List of top Chemistry Questions asked in CUET (PG)

The bond enthalpies for C-H, C1-C1, C-C1 and H-Cl are 99, 58, 78 and 103 kcal/mol respectively. What will be the AH for the reaction
CH_4(g) + Cl_2(g) → CH₃Cl_(g) + HCl_(g)

Select the option which is correct about photochemical reaction:
A. Temperature has very little effect on rate of reaction.
B. The presence of light is the primary requirement.
C. AG may be positive or negative for spontaneous photochemical reaction.
D. Photochemical reaction always involves emission of light radiation.
Choose the correct answer from the options given below:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Concentrated HNO₃ is colourless but often turns yellow on keeping.
Reason R: Photo chemical decomposition of HNO₃ gives NO₂.
In the light of the above statements, choose the most appropriate answer from the options given below:

The initial rate of a reaction in which the substrate, S, undergoes a reaction in the presence of catalyst C, was found to be equal to v₀ = \(\frac{K_2[S]_0[C]_0}{[S]_0+Km} \)The probable condition in which the reaction took place was

Identify the class of the following reaction.

Membrane filters are not manufactured from which of following polymers

Which of the following is NOT a cellulosic fibre?

Kronecker delta is defined by

The values of van't Hoff factors for NaCl, KCI and K₂SO₄, respectively are

The correct combination of enzyme and metal ion at the active site is

For the reaction
2N₂O₅→4NO₂+0₂
Rate of the reaction is:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: The moving boundary method yields more accurate data on transference number than does the Hittorf method.
Reason R: In moving boundary method, indicator electrolyte has same anion as principal electrolyte and is placed at the bottom due to its higher density.
In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements:
Statement I: To form interstitial alloys, the radius ratio of smaller atom/larger atom should be in the range 0.414-0.732.
Statement II: Two different metals having metallic radii differing only by 10% but similar crystal structures can form a good alloy.
In the light of the above statements, choose the most appropriate answer from the options given below:

Following anti-oxidant is used to prevent oxidative degradation of plastic :

Considering the following reactions and their reduction potentials in acidic medium

What will be the free energy change (\(\triangle\)G) of the reaction. \(IO^-_3\)→ \(\frac{1}{2}I_2\)

The properties used for calculating Pauling's electronegativity and Mullikan electronegativity, respectively are

The galvanic cell with the cell reaction
Mg(s) + 2Ag⁺ (0.001M)→ Mg²⁺ (0.65M) + 2Ag(s)
is correctly represented as

Solubility of gases (e.g oxygen in atmosphere) in liquid (e.g water in a river) is best explained by -

Which of the following vitamin is called as 'Tocopherol'.

Choose the correct statements:
(A) The pH of unpolluted natural rain water is ~5.6
(B) \(H_2SO_4\) and \(HNO_3\) are predominat acids in acid rain
(C) Acidic rainwater have pH less than 5.6
(D) Acid rain affect monuments, buildings and soil fertility
(E) Neutral pH of unpolluted natural rain water is 7
Choose the correct answer from the options given below:

The conjugate base of a strong acid is a weak base and it has least tendency to accept a proton, which one is an example of strong acid?

Which of the following is most acidic from the mentioned material?

Match List I with List II

	List I (Books)		List II (Author)
A	Iron	I	Body water balance and nerve function
B	Calcium	II	Digestion and metabolism
C	Sodium	III	Constituent of haemoglobin
D	Zinc	IV	Blood clotting and nerve transmission

Choose the correct answer from the options given below:

Which of the following zones in a river stretch will have highest biological oxidation demand?

Oxidation of H2O to produce O2 is performed by