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BITSAT Chemistry 2025 Most Important Topics and QuestionsBITSAT Chemistry 2025 Most Important Topics and Questions: There are 30 questions in the Chemistry section which accounts for a total of 23% weightage in the BITSAT Chemistry 2025 exam. Approximately 30–35% of the Chemistry section in the BITSAT exam consists of Physical Chemistry with at least 9–10 questions. The major high-weightage topics are Thermodynamics, Chemical Kinetics, Electrochemistry, the structure of Atoms and Mole Concepts. Many students find Thermodynamics and Chemical Kinetics challenging and somewhat difficult, but these topics carry higher number of questions in the Chemistry section of the exam. About 35–40%, i.e. around 11–12 questions come from Organic Chemistry, which carries the highest weightage.
The major subjects in Organic Chemistry are Hydrocarbons, General Organic Chemistry, Functional Groups that include oxygen and nitrogen, how each reaction happens and Carboxylic Acids and their compounds. Stereochemistry matters as well, though it may be challenging since it involves difficult concepts. About 7–8 questions (25–30% of the paper) are part of Inorganic Chemistry. Remember to study Chemical Bonding (10% weightage), the Periodic Table, s-block and p-block elements and Coordination Compounds. Topics like Chemical Bonding and Periodic Table are thought to be easier and students can score well in this area, however, p-block elements need to be studied in detail.
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BITSAT Chemistry 2025 Most Important Topics
Students can check below all the BITSAT Chemistry 2025 Most Important Topics that they must focus on more to gain maximum scores in this section of the exam:- Chemical Bonding (around 10%)
- Biomolecules (6-7%)
- Carboxylic Acid and Its Derivatives (6-7%)
- Atomic Structure (6%)
- p-block Elements (6-7%)
- Mole Concepts (6%)
- Alkanes, Alkenes and Alkynes (5%)
- Electrochemistry (4-5%)
- Chemical Thermodynamics (5%)
BITSAT Chemistry 2025 Most Expected Questions
Students can solve below BITSAT Chemistry 2025 Most Expected Questions to improve their overall preparation for the upcoming exam:1. Directions: Consider the following reaction.
CH 3 CHO+HCN→CH 3 CH(OH)CN (in presence of HOH) →
In this reaction, an asymmetric center is generated. The acid obtained would be:
A. 50% D + 50% L-isomer
B. 20% D + 80% L - isomer
C. D-isomer
D. L-isomer
2. An organic compound of molecular formula C 3 H 6 O forms 2,4-dinitrophenylhydrazone but gives negative tollen's test. The compound is:
A) CH 2 =CH-CH 2 -OH
B) CH 3 CH 2 CHO
C) CH 3 COCH 3
D) CH 2 = CH-OCH 3
3. lonization constant of acetic acid is 1.8x10 -5 . The concentration of H + ions in 0.1 M solution is:
A. 1.8 x 10 -3 M
B. 1.8 x 10 -5 M
C. 1.3 x 10 -3 M
D. 1.34 x 10 -3 M
4. One mole of a complex compound Co(NH 3 ) 5 Cl 3 gives 3 moles of ions on disssolution in water. One mole of the same complex reacts with two moles of AgNO 3 solution to yield two moles of AgCl (s). The structure of the complex is:
A) [Co(NH 3 ) 5 Cl] CI 2
B) [Co(NH 3 ) 3 Cl 2 ]. 2 NH 3
C) [Co(NH 3 ) 4 Cl 2 ] CI.NH 3
D) [Co(NH 3 ) 4 CI] CI 2 .NH 3
5. Select the incorrect statement (s) about the following reaction of ether synthesis.
RX + R' ONa → RO R' + NaX
A) It follows S N 2 mechanism
B) Alkyl halide (RX) should be 2° or 3° while alkoxide (RO- Na + ) should be 1°
C) Alkyl halide should be 1º while alkoxide should be 2° or 3°.
D) 2º and 3º alkyl halides may undergo E2 elimination in the presence of a strong base to form alkenes.
6. If there were three possible values (-1/2, 0, +1/2) for the spin magnetic quantum number, m, how many elements would there be in the 4th period of periodic table in 4s, 4p, 4d respectively?
A) 25
B) 30
C) 27
D) 28
7. Calculate the Rydberg constant R H if He + ions are known to have the wavelength difference between the first (of the longest wavelength) lines of Balmer and Lyman series equal to 133.7 nm.
A) 1.095 x 10 7 m -1
B) 1.52 x 10 7 m -1
С) 1.98 x 10 7 m -1
D) 1.804 x 10 7 m -1
8. Considering the reaction, C(s) + O 2 (g) → CO 2 (g) + 393.5 kJ The signs of ΔH, ΔS and ΔG respectively are
A) -,+,-
B) -, -, -
C) -,+,+
D) +, -, -
9. Highest osmotic pressure is shown by a solution of:
A) 0.1 M aluminium sulphate
B) 0.1 M potassium nitrate
C) 0.1 M magnesium chloride
D) 0.1 M barium chloride
10. The radius of the first bohr orbit (n = 1) of hydrogen atom is 53.4 pm. The radius of bohr orbit having n = 3 in Li ²+ will be:
(A) 53.4 pm
(B) 106.8 pm
(C)120.1 pm
(D) 160.2 pm
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