CUET PG Chemistry Exam 2026 March 11 LIVE: Last-minute Preparation Short Notes; Practice Questions & Important Topics

12 00 PM IST - 11 Mar'26

CUET PG Chemistry Exam 2026: Reporting and Entry Protocol

• Candidates should arrive at the exam centre at least 60 to 90 minutes before the gate closing time. Once the gate is closed, candidates will not be allowed to enter the exam hall.
• Do not wear large metal buckles, thick-soled shoes, or clothes
• No jewelry is allowed inside the exam hall
• Do not bring any electronic gadgets

11 00 AM IST - 11 Mar'26

CUET PG Chemistry Exam 2026: Exam Day Guidelines

• Candidates should not forget to bring their CUET PG admit card to the exam hall
• Along with the admit card, the candidates should bring their Aadhaar Card, PAN Card, Voter ID, or passport
• Carry at least two passport-sized photographs (same pasted in the application form) on the attendance sheets
• Black or blue ballpoint pen

10 00 AM IST - 11 Mar'26

CUET PG Chemistry Exam 2026: Essential Data to Memorize

• 
• 
• Bragg’s Law: 
• Spin-only Magnetic Moment: 

09 00 AM IST - 11 Mar'26

CUET PG Chemistry Exam 2026: Time Management Strategy

08 00 AM IST - 11 Mar'26

CUET PG Chemistry Exam 2026: Last Minute Preparation Tips (1/1)

Usually, the candidates make mistakes while calculating the Physical Chemistry section; hence, they should keep in mind the following instructions:

• Double-check the units in Electrochemistry and Thermodynamics.
• Quickly review the t_1/2 relations for 1, 1st and 2nd order for Kinetics.
• Revise the Langmuir Adsorption Isotherm graph and the difference between Physisorption and Chemisorption.

07 00 AM IST - 11 Mar'26

CUET PG Chemistry Exam 2026: Toppers' tips to Follow (1/2)

• For answering the Organic Chemistry questions, candidates should focus more on the Mechanism over the Memory Approach.
• As per the toppers, candidates should solve the "one-liner" and theoretical questions (from Organic and Inorganic Chemistry) in the first 40 minutes
• Solve the rest Physical Chemistry Numericals in 65 minutes.
• To solve the "Match the Following" questions, the candidates should find one correct pair; usually, the 2 or 3 options will be eliminated immediately.
• It is better to avoid blind guessing, since there is a 1 mark deduction for every incorrect answer. So it's better to skip the questions. 

06 00 AM IST - 11 Mar'26

CUET PG Chemistry Exam 2026: Toppers' tips to Follow (1/1)

• NTA usually mixes the units. Hence, always convert the SI units before plugging values into the Arrhenius Equation or Nernst Equation
• Don't forget the first order Kinetics, that is . This is the common shortcut for CUET 
• The candidates can save their crucial time during calculations if they memorize 

05 00 AM IST - 11 Mar'26

CUET PG Chemistry Exam 2026: Practice Questions on Chemical Bonding (1/3)

Ques. Which type of intermolecular force is primarily responsible for the high boiling point of water (H₂0) compared to H₂S?

Answer. Hydrogen Bonding

Ques. What is the hybridization and the formal charge on the central Oxygen atom in the Ozone (O₃) molecule?

Answer. sp², +1

04 00 AM IST - 11 Mar'26

CUET PG Chemistry Exam 2026: Practice Questions on Chemical Bonding (1/2)

Ques. Using Fajan's rules, identify which of the following halides has the highest covalent character.

Answer. AlCl₃

Ques. What is the hybridization of the central Phosphorus atom in PCl₅ and its resulting molecular geometry?

Answer. sp³d, Trigonal bipyramidal

Ques. Which molecule possesses a non-zero dipole moment despite having polar bonds?

Answer. NH₃

03 00 AM IST - 11 Mar'26

CUET PG Chemistry Exam 2026: Practice Questions on Chemical Bonding (1)

Ques. According to VSEPR theory, what is the geometry and the number of lone pairs on the central atom in the XeF₄ molecule?

Answer. Square planar, 2 lone pairs

Ques. Which of the following species is paramagnetic according to Molecular Orbital Theory?

Answer. B₂

02 00 AM IST - 11 Mar'26

The Periodic Trend Summary Table: Cheat Sheet for Quick Revision

Property	Across a Period (----->)	Down a Group
Atomic/Ionic Radius	Decreases	Increases
Ionization Energy	Increases	Decreases
Electron Affinity	More Negative	Less Negative
Electronegativity	Increases	Decreases
Metallic Character	Decreases	Increases

01 00 AM IST - 11 Mar'26

Short notes on Periodicity of Elements for CUET PG Chemistry Exam 2026 (1/2)

Atomic and Ionic Radii: 

• Atomic Radius decreases across the period (due to the rise in Z_eff) and rises down a group (due to the new shells).
• Ionic Radius: Anions are always greater than their parent atoms (0^2->0). Cations are always smaller than the parent atoms (Mg²⁺<Mg)
• Isoelectronic Species: For the ions with a similar number of electrons, the radius decreases as the atomic number increases. 

12 00 AM IST - 11 Mar'26

Short notes on Periodicity of Elements for CUET PG Chemistry Exam 2026 (1/1)

• Effective Nuclear Charge and Shielding:
  • Slater's Rule: This rule is used for calculating the screening constant (σ); that is Z_eff= Z-σ
  • Trend: Z_eff rises across a period (leads to the smaller atoms) and remains constant down a group. 

11 00 PM IST - 10 Mar'26

Periodicity of Elements Practice questions for CUET PG Chemistry Exam 2026 (1/3)

Ques. Which of the following properties generally decreases across a period from left to right?

Answer. Atomic Radius

Ques. The electronegativity of elements on the Pauling scale is based on:

Answer. Bond dissociation energies of molecules

10 00 PM IST - 10 Mar'26

Periodicity of Elements Practice questions for CUET PG Chemistry Exam 2026 (1/2)

Ques. Why is the electron gain enthalpy of Chlorine (Cl) more negative than that of Fluorine (F)?

Answer. Chlorine has a larger atomic size.

Ques. The diagonal relationship between Beryllium (Be) and Aluminum (Al) is due to their similar:

Answer. Ionic radii and charge-to-size ratio

09 00 PM IST - 10 Mar'26

Periodicity of Elements Practice questions for CUET PG Chemistry Exam 2026 (1/1)

Ques. Which of the following elements has the highest first ionization energy?

Answer. Nitrogen.

Ques. Which factor is primarily responsible for the 'Lanthanide Contraction'?

Answer. The poor shielding effect of 4 f electrons

08 00 PM IST - 10 Mar'26

Atomic Structure Practice questions for CUET PG Chemistry Exam 2026 (1/2)

Ques. What is the total number of nodes (radial + angular) for a 4d orbital?

Answer. 3

Ques. If the velocity of a particle is doubled and its mass is halved, how does its de Broglie wavelength (λ) change?

Answer. It remains the same

07 00 PM IST - 10 Mar'26

Atomic Structure Practice questions for CUET PG Chemistry Exam 2026 (1/1)

Ques. For a hydrogen atom, which of the following expressions correctly represents the energy of an electron in the $n$-th orbit according to the Bohr model?

Answer. E_n= -13.6/n² eV

Ques. The number of radial nodes in a 3p orbital is:

Answer: 1

06 00 PM IST - 10 Mar'26

CUET PG Chemistry Exam 2026: Common Trap to Avoid in Electrochemistry Section

The "Half-Cell" Trap:

Noone should add E^o values for finding out the potential of a third half-reaction. Candidates must add the ΔG⁰ values. 

• Correct: ΔG⁰₃= ΔG⁰₁+ΔG⁰₂
• Incorrect: E⁰₃= E⁰₁+E⁰₂ (unless n is the same for all)

05 00 PM IST - 10 Mar'26

3 One-Liners for Kinetics

• Half-Life Ratio: For a first-order reaction, the time taken for 99.9% completion will be approximately 10 times the half-life (t_99.9% 10Xt_1/2)
• Units of k: If the units of k are L²mol^-2s^-1, the reaction is third order
• Activation Energy: If E_a=0, the rate constant k becomes equivalent to the pre-exponential factor A and is independent of temperature. 

04 00 PM IST - 10 Mar'26

Numerical problem on The Reversible Intermediate (Lindemann Mechanism)

This is a classic model for unimolecular reactions:

Question: Derive the rate law for the formation of product P, assuming A* is at steady state.

03 00 PM IST - 10 Mar'26

Numerical problem on "Steady State Approximation"

Problem 1: The Multi-Step Mechanism

Consider the following decomposition of a reactant A

Question: If B is a highly reactive intermediate, what is the rate of formation of $C$ using the Steady State Approximation?

Conclusion: The reaction is First Order with respect to A.

02 00 PM IST - 10 Mar'26

CUET PG Chemistry Exam 2026: Exam Strategy for Chemical Kinetics

1. Unit Watch: The units of k change with order.
   • Zero order: mol L^-1 s^-1
   • First order: s^-1
   • Second order: L mol^-1s^-1
2. Graph Identification: A plot of log k vs 1/T is a straight line with slope - E_a/2.303 R

01 00 PM IST - 10 Mar'26

Pro Guidance Tips on Chemical Kinetics: Rate Laws and Order of Reaction

Zero Order: Rate is independent of concentration:

• Integrated Rate Law: [A]= [A]₀-kt
• Half-life: [A]₀/2k (Directly proportional to initial concentration).

First-Order: Rate is proportional to concentration.

• Integrated Rate Law: 
• Half-life: 0.693/k (Independent of initial concentration)

n-th Order Half-life: (Crucial for identifying order from data).

12 00 PM IST - 10 Mar'26

"One-Liner" questions on Phase Equilibria (Clausius-Clapeyron equation) (1/2)

Ques. For a two-component system at constant pressure, what is the 'Reduced' or 'Condensed' Phase Rule? Answer. F=C-P+1

Ques. For a one-component system, what is the maximum number of phases that can coexist at equilibrium? Answer. 3

Ques. Which assumption is made when deriving the Clausius-Clapeyron equation from the Clapeyron equation? Answer. The vapor behaves as an ideal gas, and its molar volume is much larger than the liquid's

Ques. For the sublimation of iodine, which equation would you use to find the temperature dependence of its vapor pressure? Answer. Clausius- Clapeyron equation with ΔH_sub

12 00 PM IST - 10 Mar'26

Numerical Problem on Thermodynamic Potentials & Maxwell Relations

Ques. Which of the following is equivalent to (δG/ δP)_T?

1. -S
2. V
3. T
4. -P

Answer. Option 2

11 00 AM IST - 10 Mar'26

"One-Liner" questions on Phase Equilibria (Clausius-Clapeyron equation) (1/1)

1. According to the Gibbs Phase Rule (F= C-P+2), what are the degrees of freedom for a system of pure water at its triple point? Ans. 0
2. Which form of the Clausius-Clapeyron equation correctly relates the vapor pressure (P) to temperature (T)? Ans. 
3. For the water system, why is the slope of the solid-liquid coexistence line (dP/dT) negative? Ans. The molar volume of ice is greater than that of liquid water
4. At the critical point of a substance, which phenomenon is observed? Ans. The distinction between liquid and gas disappears

10 00 AM IST - 10 Mar'26

Numerical Problem on Gibbs-Helmholtz and Spontaneity

Problem Type: For a certain reaction, ΔH= -40kJmol-1 and ΔS= -100 JK-1 mol-1. At what temperature does the reaction become non-spontaneous?

Expert Solution:

• Identify the Equilibrium Point: A reaction changes spontaneity at ΔG=0
• Set up the equation:
  • 0=ΔH - TΔS------> T= ΔH/ΔS
• Check Units (The Trap): ΔH is in kJ, ΔS is in J. Convert ΔH to J. T= (-40000J)/(-100 JK^-1)= 400 K
• Analyze the Trend: Since both ΔH and ΔS are negative, the reaction is spontaneous at low temperatures (T<400 K) and becomes non-spontaneous at T>400 K. 

09 00 AM IST - 10 Mar'26

Numerical problems on Carnot Efficiency

Problem Type: A Carnot engine operates between a source at 527 °C and a sink at 127 °C. If it absorbs 1000 J of heat from the source, how much work is done?

Expert Solution:

1. Convert to Kelvin (Mandatory):
   • T_hot= 527+273= 800 K
   • T_cold= 127+273= 400 K
2. Calculate Efficiency= 1- T_cold/T_hot= 1- (400/800)= 0.5 (or 50%)
3. Calculation of Work (W): 
   • Efficiency= W/q_in------> 0.5= W/1000
   • W= 500J

08 45 AM IST - 10 Mar'26

CUET PG Chemistry Exam 2026: Expert Tips for Thermodynamics

• State vs. Path Functions: Candidates should note it down that q and w are path functions; whereas U, H, S, G, and A are state functions.
• Cyclic Process: For the cyclic process, the change in any state function is always zero.
• Efficiency of Carnot Engine: n=1-T_cold/T_hot=w/q_hot. Temperatures must always be in Kelvin.

08 30 AM IST - 10 Mar'26

CUET PG Chemistry Ionic Equilibria: Final Revision Checklist

• Log Values: Memorize log 2(0.3), log 3 (0.48), and log 5 (0.7)
• Alpha (α): Candidates should check if the approximation 1-α1 is valid (usually if K_a/C<10^-3)
• Temperature Dependency: Keep in mind that K_w rises when the temperature rises, which means pH+pOH will be less than 14 at temperatures above 298 K.

08 15 AM IST - 10 Mar'26

CUET PG Chemistry Ionic Equilibria: Indicators and Titration

08 00 AM IST - 10 Mar'26

Salt Hydrolysis: The Shortcut Table

07 45 AM IST - 10 Mar'26

CUET PG Chemistry Ionic Equilibria: The "Dilution Trap" in pH Calculations

• The Concept: The candidates cannot simply take -log(10^-8). They should account for the [H⁺] contributed by the auto-ionization of water (10^-7M)
• The Math: Total [H⁺]= [H⁺]_acid+ [H⁺]_water
• The Result: The pH of 10^-8 M HCl is approximately 6.98, not 8. An acidic solution would not be a basic pH.

07 30 AM IST - 10 Mar'26

Quick list of "One-Liner" facts for Organometallic Chemistry (Inorganic) (1/4)

18-Electron Calculation Tip: For the Neutral Atom Method, are highlighted in the following section-

CO= 2 electrons

n⁵-Cp= 5 electrons

CH₃= 1 electron

PPh₃= 2 electrons

07 15 AM IST - 10 Mar'26

Quick list of "One-Liner" facts for Organometallic Chemistry (Inorganic) (1/3)

• Reductive Elimination: This is the exact opposite of the oxidative addition, and this is the final step of many cycles (such as Monsanto Process), where the product is released.
• Oxidative Addition: During this step of the catalytic cycle, both the formal oxidation state and the coordination number of the metal will be increased by two. 
• Monsanto vs. Cativa Process: Both produce the Acetic Acid; nonetheless, Monsanto uses a Rhodium catalyst, while the Cativa process uses a more efficient Iridium catalyst.

07 00 AM IST - 10 Mar'26

Quick list of "One-Liner" facts for Organometallic Chemistry (Inorganic) (1/2)

• IR Stretching Frequency (v_CO): As π-backbonding rises, the M-C bond becomes stronger, but the CO bond becomes weaker, and decreases the IR stretching frequency. 
• Wilkinson’s Catalyst: It is a 16-electron, square planar complex used for the hydrogenation of alkenes. The formula is represented as 
• Zeise’s Salt: It was the first organometallic compound to involve an alkene ligand, and the formula is 

06 45 AM IST - 10 Mar'26

Quick list of "One-Liner" facts for Organometallic Chemistry (Inorganic) (1/1)

• The 18-Electron Rule: The most stable transition metal organometallic complexes, such as Metal Carbonyls, follow the 18-Electron rule. This is equivalent to the octet rule.
• Synergic Bonding: In Metal Carbonyls, (M-CO), strength is gained by CO----->m σ- donation and m----->CO λ-backbonding. 

06 30 AM IST - 10 Mar'26

CUET PG Chemistry Exam 2026: Emergency Revision Formula (1/3)

• Particle in a 1D Box:  Note that energy is proportional to n² and inversely proportional to L². 
• Bragg’s Law: nλ= 2dsinθ
• Colligative Properties: 
  • Boiling point elevation: ΔT_b=iK_bm
  • Freezing point depression: ΔT_f=iK_fm

06 15 AM IST - 10 Mar'26

CUET PG Chemistry Exam 2026: Emergency Revision Formula (1/2)

Chemical Kinetics & Electrochemistry: 

• Zero Order: 
• First Order: 
• Arrhenius Equation: .  A common question involves calculating E_a from two different temperatures.
•  Nernst Equation: (at 298 K)
• Kohlrausch’s Law: .  Very useful for calculating the molar conductivity of weak electrolytes at infinite dilution.

06 00 AM IST - 10 Mar'26

CUET PG Chemistry Exam 2026: Emergency Revision Formula (1/1)

Thermodynamics & Chemical Equilibrium:

• First Law: ΔU= q+w (Remember: w= -PΔV for expansion)
• Entropy (ΔS): Know the formula for phase changes, ΔS= q_rev/T, and for ideal gas expansion, ΔS= nRIn(V₂/V₁)+nC_vIn (T₂/T₁)
• Gibbs Free Energy: ΔG= ΔH-TΔS [If ΔG<0, the reaction is spontaneous]
• Van't Hoff Equation: In(K₂/K₁)= ΔH⁰/R (1/T₁-1/T₂). Use this for temperature dependence of equilibrium constants.

05 45 AM IST - 10 Mar'26

CUET PG Chemistry Exam 2026: Constants to Remember

For Energy/Work: R= 8.314 JK^-1mol^-1

For Gas Laws/ Pressure: R= 0.0821 atm K^-1mol^-1

Faraday’s Constant: F= 96500 C mol^-1

05 30 AM IST - 10 Mar'26

CUET PG Chemistry Exam 2026: Expert Tip for Final Revision

As per the recent paper pattern, the general section that is Part A was removed in the recent cycle, and the competition will be done solely on the Chemistry Knowledge. 

• Candidates should be careful with the units in Physical Chemistry. A small mistake in converting R (Gas Constant) values will lead to choosing the incorrect option.
• Solve previous years' papers: It is wise to solve the 2025 and 2024 question papers, since NTA sometrimes repeat the conceptual patterns. 

05 15 AM IST - 10 Mar'26

What are the high yields Organic Chemistry Topics? (1/2)

05 00 AM IST - 10 Mar'26

What are the high yields Organic Chemistry Topics? (1/1)

04 45 AM IST - 10 Mar'26

What are the high yields Inorganic Chemistry Topics? (1/2)

04 30 AM IST - 10 Mar'26

What are the high yields Inorganic Chemistry Topics? (1/1)

04 15 AM IST - 10 Mar'26

What are the high yields Physical Chemistry Topics? (1/2)

04 00 AM IST - 10 Mar'26

What are the high yields Physical Chemistry Topics? (1/1)

The Physical Chemistry section contains 30% to 35% weightage of the paper, and this is the numerical and conceptual section. Check out the chapter-wise most important topics here: