TG Inter 1st Year Chemistry Answer Key 2026 LIVE: Paper Difficulty Level Analysis; Solved QuestionsTG Inter 1st Year Chemistry Exam 2026: The Telangana State Board of Intermediate Education (TSBIE) 1st Year Chemistry exam for 2026 is a crucial milestone for Junior Inter students. The theory exam was successfully held on March 12, 2026, from 9 AM to 12 PM. The Chemistry paper was for 60 marks (total 100, with 30 marks for practicals and 10 internal/ethics). As per the question paper pattern, questions carrying 2 marks, 4 marks and 8 marks were asked. The TG Inter 1st Year Chemistry Answer Key 2026, Student Reviews and Paper Analysis have been shared below.
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TG Inter 1st Year Chemistry Answer Key 2026 (Unofficial)
Here is the TG Inter 1st Year Chemistry Answer Key 2026:Question No. | Question | Answer |
|---|---|---|
1 | What is Chemical Oxygen Demand (COD)? | COD is the amount of oxygen (in mg/L) required to chemically oxidize all the organic and inorganic impurities present in a water sample using a strong oxidizing agent like acidified K2Cr2O7. |
2 | What happens when magnesium metal is burnt in air? | When Magnesium burns in air, it reacts with both oxygen and nitrogen to form a white powder consisting of Magnesium oxide and Magnesium nitride. 2Mg+O2→2MgO3Mg+N2→Mg3N2 |
3 | Write the relation between Kp and Kc. | The relationship is given by: Kp=Kc(RT)Δn(Where Δn = moles of gaseous products - moles of gaseous reactants). |
4 | State Graham’s law of diffusion. | At constant temperature and pressure, the rate of diffusion (or effusion) of a gas is inversely proportional to the square root of its density (or molar mass).r∝d1 |
5 | Calculate the weight of 0.1 mole of sodium carbonate. | Molecular weight of Na2CO3=(2×23)+12+(3×16)=106 g/mol.Weight = Moles × Molar Mass = 0.1×106= 10.6 grams. |
6 | Write the use of ZSM-5. | ZSM-5 is a zeolite catalyst used in the petroleum industry to convert alcohols directly into gasoline (petrol) by dehydrating them. |
| 7. | Write completely the electronic configurations of K and Rb. |
K (Z=19):
1s^2.2s^2.2p^6.3s^2.3p^6.4s^1
Rb (Z=37): 1s^2.2s^2.2p^6.3s^2.3p^6.4s^2.3d^10.4p^6.5s^1 |
8 | How does graphite function as a lubricant? | Graphite has a layered structure held by weak van der Waals forces. These layers can easily slide over one another, making it slippery and effective as a dry lubricant. |
9 | What is PAN? What effect is caused by it? | PAN stands for Peroxyacetyl Nitrate. It is a powerful eye irritant found in photochemical smog and is toxic to plants (causes leaf damage). |
10 | Write the IUPAC names of the given structures. |
Structure 1:
Heptan-3-one (A 7-carbon chain with a ketone at C3).
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TG Inter 1st Year Chemistry Student Reviews 2026
The student reviews of TG Inter 1st Year Chemistry exam 2026 will be made available here soon.
TG Inter 1st Year Chemistry Exam 2026 Quick Facts
Some of the details and facts related to TG Inter 1st Year Chemistry Exam 2026 can be found below:
Aspect | Details |
|---|---|
Exam Name | TG Inter 1st Year Chemistry Exam 2026 |
Board Name | Telangana State Board of Intermediate Education (TSBIE) |
Exam Date | March 12, 2026 |
Exam Time | 9 AM to 12 PM |
Mode of Examination | Offline |
Sections | Sections A, B, & C |
Questions and Marking Scheme |
|
Max Marks | 60 Marks |
TG Inter 1st Year Chemistry Exam 2026 LIVE
02 00 PM IST - 12 Mar'26
TG Inter 1st Year Chemistry Answer Key 2026 released!
The answer key of TG Inter 1st Year Chemistry 2026 exam has been released! You can cross-verify the correct answers with your responses.
12 00 PM IST - 12 Mar'26
TG Inter 1st Year Chemistry Exam 2026 Ends!
The exam has now ended. Soon after the question paper is available, the unofficial answer key for the objective-type questions will be updated here for students' reference. Refer to the detailed analysis and unofficial answer key as soon as they are released here.
11 00 AM IST - 12 Mar'26
Detailed Analysis on TG Inter 1st Year Chemistry Exam 2026 shortly!
Soon after the exam ends, the detailed analysis of the examination will be provided here for the reference of the students. Students' reviews and experts' advice will be considered to produce the analysis of the question paper for TG Inter 1st Year Chemistry Exam 2026 shall be provided here.
10 00 AM IST - 12 Mar'26
Unofficial Answer Key for TG Inter 1st Year Chemistry Exam 2026
The CollegeDekho Subject-Experts will discuss the unofficial answer key for the TG Inter 1st Year Chemistry Exam 2026 based on the question paper soon after the exam ends. An unofficial answer key will be provided, since the official answer key will not be released. Check the unofficial answer key to know your responses.
09 00 AM IST - 12 Mar'26
TG Inter 1st Year Chemistry Exam 2026 Starts!
The exam time has now begun. As per the format, the exam will end at 12 PM after 3 hours. Students will only be allowed to leave the examination hall after the exam ends. The first 15 minutes should be dedicated to reading the question paper thoroughly and strategising to appear for the exam accordingly.
08 00 AM IST - 12 Mar'26
Reporting Opens for TG Inter 1st Year Chemistry Exam 2026
With one hour left for the exam to begin, the students have started to report to the examination hall. Last arrival will not be accepted. Students must ensure they reach the examination hall on time to avoid last-minute chaos. Make sure to carry all the necessary items.
07 00 AM IST - 12 Mar'26
TG Inter 1st Year Chemistry Exam 2026: Checklist
Make sure to carry these things along with you while reporting to the examination hall for TG Inter 1st Year Chemistry Exam 2026:
- TG Inter 1st Year Hall Ticket 2026
- Pen and Pencil
- Compass and Ruler
- Photo ID proof
- Transparent Water Bottle.
06 00 AM IST - 12 Mar'26
Post-Result Options for TG Inter 1st Year 2026
Recounting/Re-verification: If you feel your marks in Chemistry are lower than expected, you can apply for recounting or a scanned copy of your answer script through the TSBIE student portal within 10 days of the results.
Advanced Supplementary Exams: If you are unhappy with your score or fail to clear a subject, the supplementary exams are usually held in May/June 2026.
05 00 AM IST - 12 Mar'26
TG Inter 1st Year 2026 Grading System
The TG Board uses a letter grade system based on your marks:
Marks Range Grade Description 75% and above A Distinction 60% to 74% B First Division 50% to 59% C Second Division 35% to 49% D Pass Below 35% F Fail/Compartmental 04 00 AM IST - 12 Mar'26
TG Inter 1st Year 2026 Expected Result Date
For the TG Inter 1st Year 2026 exams, the results are traditionally released by the Telangana State Board of Intermediate Education (TSBIE) within 35 to 45 days after the completion of the last exam.
Expected Result Timeline
Theory Exams End: Late March 2026.
Evaluation Process: Starts in the first week of April 2026.
Result Declaration: Expected between April 20 and April 25, 2026.
03 00 AM IST - 12 Mar'26
Final Tip before TG Inter 1st Year Chemistry Exam 2026
Final Tip for the Morning: Before you enter the hall, avoid discussing "tough" questions with friends. It only creates panic. Trust the "Gunshot" list you've prepared. Your brain is like a library; the calmer you are, the easier it is to find the right book (answer) on the shelf.
02 00 AM IST - 12 Mar'26
Quick Revision Tips before TG Inter 1st Year Chemistry Exam 2026 (4)
The "Last-Look" VSAQs (2-Marks)
These are 100% memory-based and easy to lose if not refreshed:
Inorganic Benzene: Borazine (B_3N_3H_6).
Inert Pair Effect: Reluctance of s-electrons to bond in heavy p-block elements.
Acid Rain pH: Less than 5.6.
Eutrophication: Nutrient enrichment leading to oxygen depletion in water.
Lithium's Anomaly: Smallest size and highest hydration enthalpy in Group 1.
01 00 AM IST - 12 Mar'26
Quick Revision Tips before TG Inter 1st Year Chemistry Exam 2026 (3)
Organic "Quick-Fire" Name Reactions
If you see these names, you should immediately know the reagents:
- Wurtz
- Friedel-Crafts
- Ozonolysis (Look for the "break the double bond" trick).
- Decarboxylation
12 00 AM IST - 12 Mar'26
Quick Revision Tips before TG Inter 1st Year Chemistry Exam 2026 (2)
The "Must-Draw" Diagrams
Don't just read about them—visualise the labels. These are frequent sources of marks:
Bohr's Model: Energy levels (n=1, 2, 3...$) and spectrum lines (Lyman, Balmer, etc.).
Diborane Structure: Bridge hydrogens and 3-centre-2-electron bonds.
Molecular Orbital Diagrams: Specifically for O_2 (Paramagnetic) and N_2 (Diamagnetic).
VSEPR Shapes: Lone pairs vs Bond pairs for NH_3 (Pyramidal) and H_2O (Bent).
11 00 PM IST - 11 Mar'26
Quick Revision Tips before TG Inter 1st Year Chemistry Exam 2026 (1)
Since the exam is only hours away, your goal is high-speed retention. Use this checklist to run through the entire syllabus in about 45 minutes.
The "10-Minute Formula" Flash
Quickly recite these formulas; if you forget one, look it up immediately:
Atomic Structure
Gas Laws (Graham's Law)
Equilibrium
Thermodynamics
Stoichiometry
10 40 PM IST - 11 Mar'26
Revision Tips for TG Inter 1st Year Chemistry Exam 2026 (5)
The "Do Not" List for Tonight
Do NOT solve new numericals: If you haven't done them by now, just memorise the formula. Don't waste 30 minutes on one math problem.
Do NOT read full chapters: Only look at side-headings, bolded terms, and diagrams.
Do NOT drink too much caffeine: You need at least 5 hours of sleep so your brain can "save" the information you just revised.
10 20 PM IST - 11 Mar'26
Revision Tips for TG Inter 1st Year Chemistry Exam 2026 (4)
Hour 3: The 20-Mark "Sniper" Revision (Section A)
Flip through the back-of-chapter VSAQs (Very Short Answer Questions).
Environmental Chemistry: Know BOD, COD, and Greenhouse gases.
s & p Block: Memorise formulas like Plaster of Paris and Borazine
IUPAC: Look at 5-10 naming examples from the Organic chapter.
10 00 PM IST - 11 Mar'26
Revision Tips for TG Inter 1st Year Chemistry Exam 2026 (3)
Hour 2: The 24-Mark Heavy Hitters (Section B)
Pick the 6 easiest chapters to get your 6 questions.
Chemical Bonding: Quickly draw PCl_5 (Trigonal Bipyramidal) and SF_6 (Octahedral).
Diborane: Draw the "Banana Bond" structure. This is a high-probability 4-marker.
Haber’s Process: Note the conditions (200 atm, 725 K).
States of Matter: Review PV=nRT and Graham’s Law formula.
09 40 PM IST - 11 Mar'26
Revision Tips for TG Inter 1st Year Chemistry Exam 2026 (2)
Hour 1: The 16-Mark Guarantee (Section C)
Focus only on the "Big Three." Don't read the text; just practice drawing the diagrams and writing the chemical equations.
Bohr’s Atomic Model: Draw the energy levels and memorise the Rydberg formula.
Periodic Trends: Memorise why IE_2 > IE_1 and how atomic radius changes in groups/periods.
Benzene/Acetylene: Write the preparation equations three times each.
09 20 PM IST - 11 Mar'26
Revision Tips for TG Inter 1st Year Chemistry Exam 2026 (1)
Since it is already late on the eve of the exam, you need to stop reading new topics and focus on Maximum Mark Extraction. Do not try to read the whole textbook. Follow this "Triage" plan to finish in 3-4 hours and get some sleep. The 3-Hour "Power Revision" Schedule will help to complete the syllabus.
09 00 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026 Difficulty Level: 2024 vs 2025 vs 2026
2024 & 2025: The papers were balanced with no major "out-of-syllabus" shocks.
2026 Prediction: Since this is the first full-syllabus exam after some minor curriculum streamlining, the board is likely to keep the paper student-friendly to maintain a good pass percentage.
08 40 PM IST - 11 Mar'26
Section C Difficulty Level for TG Inter 1st Year Chemistry Exam 2026
Section C (8 Marks) – High Scoring
This is traditionally the easiest section because the questions are almost always from the fixed pool (Bohr’s Model, Periodic Properties, and Benzene/Acetylene). As long as you don't make mistakes in Bohr's energy levels or Organic mechanisms, these 16 marks are "guaranteed."
08 20 PM IST - 11 Mar'26
Section B Difficulty Level for TG Inter 1st Year Chemistry Exam 2026
Section B (4 Marks) – Standard & Predictable
This section is usually very standard. Expect questions on Fajan's Rules, Le Chatelier's Principle, and Diborane structure. The difficulty here is usually low, but you must be careful with diagrams and chemical equations.
08 00 PM IST - 11 Mar'26
Section A Difficulty Level for TG Inter 1st Year Chemistry Exam 2026
Section A (2 Marks) – The "Rank Decider"
This is often the trickiest section. While 7-8 questions will be direct (like defining BOD or Graham's Law), 2 questions might involve a small calculation or a specific IUPAC name that requires precision. Tip: Don't panic if one 2-marker seems new; write the related formula/concept to get step marks.
07 40 PM IST - 11 Mar'26
Expected Difficulty Level for TG Inter 1st Year Chemistry Exam 2026 (2)
Moderate (30%): This usually includes numericals from Stoichiometry or States of Matter, and some logic-based questions in Chemical Bonding.
Difficult (10%): One or two 2-mark questions (VSAQs) might be "application-based" or from the middle of a chapter to distinguish the 60/60 scorers from the rest.
07 20 PM IST - 11 Mar'26
Expected Difficulty Level for TG Inter 1st Year Chemistry Exam 2026 (1)
For the TG Inter 1st Year Chemistry exam in 2026, the expected difficulty level is Easy to Moderate, leaning heavily toward "Scorable." The Telangana Board typically follows a very consistent pattern for Chemistry. Here is the breakdown of what to expect:
Difficulty Breakdown
Easy (60%): Direct questions from the Telugu Academy textbook exercises. If you have studied the "Gunshot" questions we discussed, you will find this portion very comfortable.
07 00 PM IST - 11 Mar'26
Verification of Details for TG Inter 1st Year Chemistry Exam 2026
When you receive your OMR sheet, it will usually come pre-printed with your details. Check these immediately:
Name & Hall Ticket Number: Ensure they match your hall ticket.
Subject: It should say "Chemistry - I".
Paper Code: Verify that the code on your question paper matches the one you bubble on the OMR.
06 45 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: Main Answer Booklet
Signature: Ensure you sign in the designated "Candidate’s Signature" box.
Invigilator Signature: Check that the invigilator has signed your OMR. An unsigned OMR is technically invalid.
Stitching: Make sure the OMR sheet is properly attached to your 24-page answer booklet.
06 30 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: OMR Sheet Instructions (3)
No Stray Marks: Do not write anything outside the provided boxes.
Do Not Fold: Do not fold, tear, or staple the OMR sheet. A crease can prevent the scanner from reading your data.
No Whitener: If you bubble the wrong circle, do not use whitener or try to scratch it off with a blade. This can damage the paper and lead to disqualification. Ask the invigilator for guidance if a mistake happens.
06 15 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: OMR Sheet Instructions (2)
Do Not Use a Pencil: Unless explicitly told otherwise by the invigilator for a specific section, use a pen.
Full Bubbling: Darken the circle completely. Do not put a tick mark, a cross, or a tiny dot. The machine won't read it.
06 00 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: OMR Sheet Instructions (1)
Filling out the OMR (Optical Mark Recognition) sheet correctly is the most important part of your first 15 minutes. Since a machine scans this, any major error could delay your results. Here are the strict guidelines for the TG Inter 1st Year Chemistry exam:
- Blue or Black Ballpoint Only: Use a ballpoint pen. Do not use gel pens (they smudge) or ink pens.
05 45 PM IST - 11 Mar'26
Avoid These Common Mistakes on TG Inter 1st Year Chemistry Exam 2026
Wallets and Purses: Most centres will ask you to leave these in a common area outside. Only carry the cash you need for travel in your pocket.
Whitener/Corrective Fluid: These are not allowed on the OMR sheet or the answer booklet. If you make a mistake, simply strike it out with a single line.
Rough Paper: Do not bring your own rough paper. The last page of your 24-page answer booklet is specifically meant for rough work—label it "ROUGH WORK" at the top.
05 30 PM IST - 11 Mar'26
Prohibited Items for TG Inter 1st Year Chemistry Exam 2026 (2)
Written Material: Bits of paper, textbooks, notebooks, or even your hall ticket with extra writing on the back.
Non-Transparent Items: Opaque pencil boxes or pouches. Use a transparent pouch or just carry your pens loose.
Digital/Programmable Watches: Stick to a basic analogue watch to keep track of time.
05 15 PM IST - 11 Mar'26
Prohibited Items for TG Inter 1st Year Chemistry Exam 2026 (1)
Electronic Gadgets: Mobile phones, smartwatches, fitness bands, earphones, or Bluetooth devices. Even if they are switched off, having them on your person is considered malpractice.
Calculators: Unlike some other boards, calculators are not allowed for TG Inter exams. You must do all Chemistry calculations (like Log values or Stoichiometry) manually on the rough page of your answer booklet.
05 00 PM IST - 11 Mar'26
Official Exam Timings for TG Inter 1st Year Chemistry Exam 2026
Since your exam is tomorrow, Thursday, March 12, 2026, timing is critical. The Telangana State Board of Intermediate Education (TGBIE) has updated its entry rules this year to help students manage stress.
Official Exam Timings
Exam Time: 9:00 AM to 12:00 PM
Reporting Time: 8:00 AM to 8:30 AM
Latest Entry Time (Revised): 9:05 AM
04 45 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: What to Carry Tomorrow
Original Hall Ticket: A printed copy is mandatory.
Writing Kit: 2-3 blue/black ballpoint pens, a pencil, and an eraser for diagrams.
Transparent Water Bottle: To stay hydrated without breaking rules.
Photo ID: Keep a school ID or Aadhaar card as a backup.
04 30 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: Exam Day Timing (2)
8:45 AM – 9:00 AM: OMR Sheet filling. You will be given your OMR answer sheet to fill in your bio-data and hall ticket details. Be very careful here; mistakes on the OMR are hard to fix!
9:00 AM: Question paper distribution.
04 15 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: Exam Day Timing (1)
8:15 AM – 8:30 AM: Reach the exam centre. This gives you plenty of time to find your room number and seat on the notice board.
8:45 AM: Exam hall entry. Use this time to settle in, check your desk for any papers, and mentally rehearse your 8-mark organic reactions.
04 00 PM IST - 11 Mar'26
How to manage time for TG Inter 1st Year Chemistry Exam 2026?
Section Target Time Strategy Section A (10 VSAQs) 30 Minutes 3 minutes per question. Be crisp; don't write more than 2-3 lines. Section B (6 SAQs) 70 Minutes 11 minutes per question. Prioritise diagrams and equations over long paragraphs. Section C (2 LAQs) 60 Minutes 30 minutes per question. This is where you draw detailed, labelled diagrams. Buffer/Revision 20 Minutes Check for question numbers, units, and underlined keywords. 03 45 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: Important Reactions (3)
Note the important reactions from the Physical Chemistry (Equilibrium & Redox) section here for reference, and accordingly prepare for the examination. Any of these reactions is likely to be included in the 4-mark or 8-mark questions:
Haber’s Process (Ammonia)
Ion-Electron Method (Acidic Medium)
03 30 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: Important Reactions (2)
These often appear as 2-mark or 4-mark "How does X react with Y?" questions from the Inorganic Chemistry (s & p Block). Ensure to cover these reactions:
Castner-Kellner Process (NaOH Preparation)
Reaction of Diborane with Ammonia (NH_3)
Preparation of Water Gas
Preparation of Producer Gas
03 15 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: Important Reactions (1)
From Organic Chemistry (Hydrocarbons), here are the most important reactions that need to be covered by the students. Out of these, one of the reactions is most likely to be included in the 8 mark questions:
Wurtz Reaction
Friedel-Crafts Alkylation
Nitration of Benzene
Polymerisation of Acetylene
Ozonolysis of Ethylene
03 00 PM IST - 11 Mar'26
Common Pitfalls to Avoid for TG Inter 1st Year Chemistry Exam 2026
Calculation Errors: In Stoichiometry or Gas Laws, double-check your units. Ensure temperature is in Kelvin (K) and not Celsius.
Hybridisation Shapes: Don't just name the hybridisation; draw the shape. For $PCl_5$, showing the axial and equatorial bonds clearly can save you from losing a mark.
Organic Names: Ensure your IUPAC spellings are correct. A small typo in "propan-2-ol" vs "propan-2-al" changes the entire functional group.
02 45 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: Presentation Tips (2)
Keywords: In 2-mark and 4-mark answers, bold or underline technical terms like "Lanthanide Contraction," "Inert Pair Effect," or "Banana Bond."
Section A (2M): Keep it crisp. If they ask for a definition, give the definition and one example. Don't write paragraphs.
02 30 PM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: Presentation Tips (1)
Telangana Board examiners look for specific "Value Points." Give them what they want:
Section C (8M): Always start with a neat, labelled diagram (like the Bohr model or an organic reaction chart). Use a pencil for diagrams and a pen for labels.
Chemical Equations: Never write a reaction without balancing it. Underline the reagents (e.g., conc. H_2SO_4) written above the arrow.
02 15 PM IST - 11 Mar'26
Expected 2 marks questions for Chemistry TG Inter 1st Year 2026 (7)
Environmental & Organic
- Acid Rain: Which oxides cause acid rain? What is its pH value? (SO_2 and NO_x; pH < 5.6).
- COD vs. BOD: Define Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD).
- Greenhouse Gases: Name the major greenhouse gases. (CO_2, CH_4, O_3, CFCs, N_2O).
- IUPAC Nomenclature: Write the IUPAC name for CH_3-CH=CH-CH_2-OH. (But-2-en-1-ol).
02 00 PM IST - 11 Mar'26
Expected 2 marks questions for Chemistry TG Inter 1st Year 2026 (6)
Inorganic Chemistry (s & p Block)
- Borazine: What is the formula and common name of Borazine? (B_3N_3H_6, called Inorganic Benzene).
- Inert Pair Effect: Define the Inert Pair Effect. (Reluctance of s-electrons to participate in bonding in heavier p-block elements).
- Allotropy: What is Allotropy? Name the crystalline allotropes of Carbon. (Diamond, Graphite, Fullerene).
01 45 PM IST - 11 Mar'26
Expected 2 marks questions for Chemistry TG Inter 1st Year 2026 (5)
Inorganic Chemistry (s & p Block)
- Lithium Salts: Why are Lithium Salts mostly hydrated? (Small size of Li+ ion results in high hydration enthalpy).
- Gypsum & Cement: Why is gypsum (CaSO_4 - 2H_2O) added to cement? (To slow down the setting process).
- Plaster of Paris: Write the formula and two uses of Plaster of Paris (CaSO_4 /{1}{2}H_2O).
01 30 PM IST - 11 Mar'26
Expected 2 marks questions for Chemistry TG Inter 1st Year 2026 (4)
Stoichiometry & Equilibrium
Ionic Product of Water (K_w): Define K_w. What is its value at 25{C}? (1.0 \10{-14}{mol}2/{L}2).
Lewis Acids & Bases: Define Lewis acids and bases. Give one example for each (e.g., BF_3 as acid, NH_3 as base).
Homogeneous vs. Heterogeneous Equilibrium: Define and give one example for each.
01 15 PM IST - 11 Mar'26
Expected 2 marks questions for Chemistry TG Inter 1st Year 2026 (3)
Stoichiometry & Equilibrium
- Molar Mass Calculation: How many moles of Glucose (C_6H_{12}O_6) are present in 540{g} of Glucose? (Answer: 3\{moles}, since molar mass is 180{g/mol}).
- Redox Concept: Assign oxidation numbers to the underlined elements: (a) K\underline{Mn}O_4 and (b) Na_2\{S_2}O_7.
01 00 PM IST - 11 Mar'26
Expected 2 marks questions for Chemistry TG Inter 1st Year 2026 (2)
States of Matter & Thermodynamics
Third Law of Thermodynamics: State the Third Law of Thermodynamics. (Entropy of a perfectly crystalline substance is zero at 0{K}.
Entropy Change: What is the sign of S for the process: H_2O_{(l)} -H_2O_{(g)}? (Answer: Positive, because randomness increases).
12 45 PM IST - 11 Mar'26
Expected 2 marks questions for Chemistry TG Inter 1st Year 2026 (1)
States of Matter & Thermodynamics
Boltzmann’s Constant: What is Boltzmann’s constant (k_B)? Give its value. (k_B = 1.38\10{-23}\{ J/K})
RMS Speed vs. Average Speed: Give the ratio of RMS speed, average speed, and most probable speed of gas molecules. (1.224:1.128:1)
Graham’s Law (Application): Which of the gases diffuses faster among N_2, O_2, and CH_4? Why? (Answer: CH_4, because it has the lowest molar mass).
12 30 PM IST - 11 Mar'26
Expected 4 marks questions for Chemistry TG Inter 1st Year 2026 (5)
9. Ion-Electron Method (Redox Balancing)
Balance a redox reaction in either an acidic or basic medium. A classic example is:
MnO_4- + Fe{2+} -Mn{2+} + Fe{3+} (in acidic medium)
10. Empirical and Molecular Formula Calculation
Practice calculating the Empirical Formula and Molecular Formula when given the percentage composition and molar mass of a compound (e.g., a compound with C, H, and Cl).
12 15 PM IST - 11 Mar'26
Expected 4 marks questions for Chemistry TG Inter 1st Year 2026 (4)
7. Conjugate Acid-Base Pairs
Define a Conjugate Acid-Base pair according to the Bronsted-Lowry theory. Give two examples (like HCl/Cl- or NH_3/NH_4+) and explain how they differ by only one proton (H+).
8. Structure of Diborane (B_2H_6)
Explain the structure of Diborane. Mention the 3-centre-2-electron bonds (Banana bonds), the terminal B-H bonds, and the hybridisation of Boron (sp3).
12 00 PM IST - 11 Mar'26
Expected 4 marks questions for Chemistry TG Inter 1st Year 2026 (3)
5. Hess’s Law of Constant Heat Summation
State Hess’s Law from the Thermodynamics chapter. Provide an example (like the formation of CO_2 in one step vs. two steps) to illustrate that the total enthalpy change remains the same regardless of the path.
6. Le Chatelier’s Principle (Ammonia Synthesis)
Explain Le Chatelier's Principle. Apply it to the industrial synthesis of Ammonia by Haber’s Process (N_2 + 3H_2 - 2NH_3). Mention the optimum conditions of temperature (725{ K}), pressure (200), and the catalyst used.
11 45 AM IST - 11 Mar'26
Expected 4 marks questions for Chemistry TG Inter 1st Year 2026 (2)
3. Graham’s Law of Diffusion
State Graham’s Law. Explain its applications (like the separation of isotopes or detecting gas leaks) and solve a simple numerical problem comparing the rates of two gases like CH_4 and SO_2.
4. Hydrogen Bonding
Define Hydrogen Bonding. Explain the two types—Intermolecular (e.g., H_2O, NH_3) and Intramolecular (e.g., o-nitrophenol)—and discuss their effect on the physical properties of substances.
11 30 AM IST - 11 Mar'26
Expected 4 marks questions for Chemistry TG Inter 1st Year 2026 (1)
1. Hybridisation of PCl_5 and SF_6
Explain the hybridisation involved in PCl_5 (sp3d) and SF_6 (sp3d2). Be sure to draw the geometry (Trigonal bipyramidal for PCl_5 and Octahedral for SF_6) and mention the bond angles.
2. Dalton’s Law of Partial Pressures
State Dalton’s Law and derive its relationship with the mole fraction of a gas (P_i = X_i \cdot P). This is a frequent visitor from the States of Matter chapter.
11 15 AM IST - 11 Mar'26
Expected 8 marks questions for Chemistry TG Inter 1st Year 2026 (9)
10. Stoichiometry & Redox (Combined)
(a) Define Empirical Formula and Molecular Formula. A compound contains 4.07% hydrogen, 24.27% carbon, and 71.65% chlorine. Its molar mass is 98.96 g. Find its molecular formula.
(b) Balance the following redox reaction by the Ion-Electron Method in an acidic medium:
MnO_4- + Fe{2+} - Mn{2+} + Fe{3+}
11 00 AM IST - 11 Mar'26
Expected 8 marks questions for Chemistry TG Inter 1st Year 2026 (8)
9. Organic Chemistry: Alkyne Preparations
Describe two methods for the preparation of Acetylene (C_2H_2). Explain its reaction with:
Water in the presence of H_2SO_4/HgSO_4
Ozone (Ozonolysis)
Bromine (Br_2/CCl_4)
Ammoniacal AgNO_3 (Tollen’s reagent)
10 45 AM IST - 11 Mar'26
Expected 8 marks questions for Chemistry TG Inter 1st Year 2026 (7)
7. Periodic Property Variations (Extended)
Explain what a periodic property is. Discuss the variation of the following properties in a Group and a Period:
Metallic Character
Nature of Oxides
Electron Gain Enthalpy
Electronegativity
8. Kinetic Molecular Theory of Gases
State the Postulates of Kinetic Molecular Theory of Gases. How does this theory explain the gas laws (Boyle’s Law and Charles’s Law)?
10 30 AM IST - 11 Mar'26
Expected 8 marks questions for Chemistry TG Inter 1st Year 2026 (6)
6. Molecular Orbital Theory (MOT)
Describe the main features of Molecular Orbital Theory. Draw the Molecular Orbital Energy Level Diagrams for:
N_2 (Nitrogen)
O_2 (Oxygen)
Calculate their Bond Order and explain their Magnetic Nature (Paramagnetic vs. Diamagnetic).
10 15 AM IST - 11 Mar'26
Expected 8 marks questions for Chemistry TG Inter 1st Year 2026 (5)
5. Hybridisation (s and p Orbitals)
What is Hybridisation? Explain the following types with one example each:
sp hybridization (BeCl_2 or C_2H_2)
sp2 hybridization (BF_3 or C_2H_4)
sp3 hybridization (CH_4)
10 00 AM IST - 11 Mar'26
Expected 8 marks questions for Chemistry TG Inter 1st Year 2026 (4)
4. VSEPR Theory & Shapes
Explain VSEPR (Valence Shell Electron Pair Repulsion) Theory. Predict the shapes and bond angles of the following molecules based on this theory:
BeCl_2 (Linear)
BF_3 (Trigonal Planar)
CH_4 (Tetrahedral)
NH_3 (Pyramidal)
H_2O (Bent/V-shape)
09 45 AM IST - 11 Mar'26
Expected 8 marks questions for Chemistry TG Inter 1st Year 2026 (3)
3. Organic Chemistry (Hydrocarbons)
Benzene: Describe any two methods of preparation for Benzene. Explain the following chemical properties with equations:
Halogenation
Nitration
Sulphonation
Friedel-Crafts Alkylation & Acylation
Acetylene/Ethylene: Describe two methods of preparation for Acetylene (or Ethylene). Explain its reactions with:
Water (H_2O) in the presence of Hg{2+}/H+
Ozone (O_3) — Ozonolysis
Hydrogen Halides (HX)
09 30 AM IST - 11 Mar'26
Expected 8 marks questions for Chemistry TG Inter 1st Year 2026 (2)
2. Classification of Elements
Ionization Enthalpy ($IE$): Define IE_1 and IE_2. Why is IE_2 always greater than IE_1? Discuss the factors (like atomic radius, nuclear charge, screening effect) that influence Ionization Enthalpy.
Periodic Property Trends: Define periodic property. Explain how the following properties vary in a group and a period:
Atomic Radius
Electron Gain Enthalpy
Electronegativity
s, p, d, f Block Elements: Write an essay on the classification of elements into s, p, d, and f blocks based on their electronic configurations.
09 15 AM IST - 11 Mar'26
Expected 8 marks questions for Chemistry TG Inter 1st Year 2026 (1)
1. Atomic Structure
Bohr’s Model of Hydrogen Atom: Write the postulates of Bohr’s theory. Explain how this model accounts for the various series of lines in the hydrogen spectrum (Lyman, Balmer, Paschen, etc.).
Quantum Numbers: Explain the significance of the four quantum numbers (n, l, m_l, and s) and how they are used to describe an electron in an atom.
09 00 AM IST - 11 Mar'26
Chapter-wise Weightage for TG Inter 1st Year Chemistry Exam 2026 (3)
The detailed chapter-wise blueprint is provided here as per the official marks distribution:
Chapter Name VSAQ (2M) SAQ (4M) LAQ (8M) Total Marks s-Block Elements 2 - - 4 p-Block Elements (Group 13) 1 - - 2 p-Block Elements (Group 14) 1 - - 2 Environmental Chemistry 2 - - 4 Organic Chemistry (Hydrocarbons) - 1 1 12 08 45 AM IST - 11 Mar'26
Chapter-wise Weightage for TG Inter 1st Year Chemistry Exam 2026 (2)
The detailed chapter-wise blueprint is provided here as per the official marks distribution:
Chapter Name VSAQ (2M) SAQ (4M) LAQ (8M) Total Marks Stoichiometry 1 1 - 6 Thermodynamics 1 1 - 6 Chemical Equilibrium & Acids-Bases 1 1 - 6 Hydrogen & its Compounds 1 1 - 6 08 30 AM IST - 11 Mar'26
Chapter-wise Weightage for TG Inter 1st Year Chemistry Exam 2026 (1)
The detailed chapter-wise blueprint is provided here as per the official marks distribution:
Chapter Name VSAQ (2M) SAQ (4M) LAQ (8M) Total Marks Atomic Structure - - 1 8 Classification of Elements - - 1 8 Chemical Bonding - 2 - 8 States of Matter (Gases & Liquids) 1 1 - 6 08 15 AM IST - 11 Mar'26
Preparation Strategy for TG Inter 1st Year Chemistry Exam 2026 (2)
Balance Equations: In the Stoichiometry and Redox Reactions chapters, practice balancing equations using the ion-electron method.
Previous Papers: Solve model papers from 2023, 2024, and 2025. Many questions, especially the 2-mark ones, are repeated.
Nodal Planes & Shapes: For the 2-mark and 4-mark sections, be ready to draw shapes of s, p, and d orbitals.
08 00 AM IST - 11 Mar'26
Preparation Strategy for TG Inter 1st Year Chemistry Exam 2026 (1)
Master the Textbooks: Stick strictly to the Telangana SCERT/Telugu Academy textbook, as 100% of questions are derived from it.
Practice 8-Mark Questions: There are only about 5-6 standard 8-mark questions (Bohr's model, Periodic properties, Organic preparations). Master these first to secure 16 marks instantly.
07 45 AM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: High-Weightage Chapters (2)
Organic Chemistry: Basic Principles & Hydrocarbons (8 Marks)
This is a major section. Focus on Isomerism, IUPAC nomenclature, and the preparation of Benzene, Ethylene, and Acetylene.
Chemical Bonding (4-8 Marks)
Key topics: VSEPR Theory, Hybridisation, and Molecular Orbital Theory (MOT).
07 30 AM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: High-Weightage Chapters (1)
Atomic Structure (8 Marks)
Expect a Long Answer Question (LAQ) on Bohr’s Model of Hydrogen Atom or Quantum Numbers.
Classification of Elements & Periodicity (8 Marks)
Focus on the Modern Periodic Table and periodic properties like Ionization Enthalpy, Electronegativity, and Atomic Radii.
07 15 AM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026: Exam Pattern & Marks Distribution
The Chemistry paper is for 60 marks (total 100, with 30 marks for practicals and 10 internal/ethics). The theory paper consists of three sections:
Section Question Type No. of Questions Marks per question Total Section A Very Short Answer (VSA) 10 (No Choice) 2 20 Section B Short Answer (SA) 6 out of 8 4 24 Section C Long Answer (LA) 2 out of 3 8 16 Total 18 60 07 00 AM IST - 11 Mar'26
TG Inter 1st Year Chemistry Exam 2026 Tomorrow!
The TSBIE has scheduled the TG Inter 1st Year Chemistry Exam 2026 to be held on March 12, 2026. Students appearing for the exam shall note the list of important topics and formulas here, along with important questions for reference. Prepare well for the exam to score good marks.
