List of top Chemistry Questions asked in CUET (UG)

Identify 'X' along with the oxidation state of the halogen in the given reaction:
\[ 3\text{Cl}_2 + 6\text{NaOH} \rightarrow 5\text{NaCl} + X + 3\text{H}_2\text{O} \quad \text{(hot and conc.)} \]

The oxoacid of sulphur which has a lone pair of electrons on the sulphur atom is:

The half-life of a first-order reaction is 25 minutes. Its rate constant is:

Acetaldehyde and benzaldehyde can be best distinguished by:

The minimum concentration of an electrolyte in millimoles per litre which is required to cause the precipitation of a sol in two hours is called as:

In amines, the nitrogen atom is A and B hybridised, making geometry of amines as C. Then A, B, and C respectively are:

Aspartame is the most successful artificial sweetener but is only limited to cold food and cold drinks because:

Which alloy is used for making bullets and lighter flints?

In the cyanide extraction process of silver, the oxidising and reducing agents used are:

Chemical formula of laughing gas is:

Which of the following reactions will not produce ketones?

Basic hydrolysis of esters produces:

The quantity of charge required to obtain 2 mol of Mn$^{2+}$ from MnO$_4^{-}$ is:

The standard reduction potential for Sn$^{4+}$/Sn$^{2+}$ is +0.15 V and for Cr$^{3+}$/Cr is -0.74 V. These two half-cells, coupled in their standard states, are connected to make a cell. The galvanic cell can be correctly represented by:

Ammonia is manufactured by:
\[ \text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g) \quad \Delta H_f^\circ = -46.1 \, \text{kJ/mol} \] The various steps involved are:
(A) Condensation of mixture of gases
(B) Passing the gaseous mixture over catalyst
(C) Compression of the mixture of gases
(D) Recirculation of the gaseous mixture
Choose the correct answer from the options given below:

In case of phosphorus, PCl$_{3}$ and PCl$_{5}$ are possible while nitrogen only forms NCl$_{3}$ and not NCl$_{5}$. This is due to:

The rate constants of a reaction at 200 K and 300 K are 0.02 s^-1 and 0.04 s^-1. Ea for this reaction will be:

Order and molecularity in the given reaction is
CHCl₃ + Cl₂ → CCl₄ + HCl
Rate = \(k[CHCl^3][Cl_2]^{\frac{1}{2}}\)

Electronic configuration of d⁶ when Δ_a < P

Cyclopropanol
Identify D

Which of the following statements relating to the acidic character of alcohols is not true ?

The canary bird is used to detect ________ gas in the Singareni coal of fields.