CUET · CHEMISTRY · PYQ PAPER 2025

The gas evolved when methylamine reacts with nitrous acid is

A \(H_2\)
B \(C_2H_6\)
C \(N_2\)
D \(NH_3\)

Verified Solution

Answer & Solution

Correct Answer

(C) \(N_2\)

Step-by-step Solution

Detailed explanation

\(N_2\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Which of the following gives a yellow precipitate when treated with \(\text{I}_2\) in presence of \(\text{NaOH}\) ?

CUET 2023 Easy
Magnetic moment values for \([\text{Fe}(\text{H}_2\text{O})_6]^{3+}\) and \([\text{Fe}(\text{CN})_6]^{3-}\) are

CUET 2023 Easy
The rate determining step for a complex reaction is:

CUET 2025 Medium
Which will form the most stable complex ?

CUET 2023 Hard
Curium (Cm) belongs to 5f series. Its atomic number is 96. Which of the following is the correct electronic configuration of Curium?

CUET 2025 Hard
Certain Aldehydes, Retore and certain alcohol undergo iodoform test. Certain Aldehydes ketones undergo aldol condensation. While certain aldehydes undergo Cannizaro's reaction. Aldehydes responds to tollen reagent and fehling reagent test.
Which amongst the following will respond to Tollens' reagent test?
A. Benzaldehyde \((C_6H_5CHO)\)
B. Formaldehyde \((HCHO)\)
C. Formic acid \((HCOOH)\)
D. Acetone \((CH_3COCH_3)\)
Choose the correct option

CUET 2023 Easy

Explore more questions on app

From CUET

Calculate the molality of KI if the density of 20% (mass/mass) aqueous solution of KI is 1.202 g mL^-1.
(Molar mass of KI is 166 g mol^-1)

CUET 2025 Medium
If \(f: R \rightarrow R\) is defined by \(f(x)=\left(4-x^2\right)^{1 / 2}\), then\(f o f(x)\) is :

CUET 2023 Easy
Answer the question on the basis of passage given below :
There are three kinds of amines which are primary, secondary and tertiary amines. These amines may have alkyl group or aryl group or both alkyl and aryl groups. These amines can be distinguished from one another by various chemical tests.
An amine A on treatment with benzene sulphonyl chloride gives a compound B which easily dissolves in an alkali : then A is :

CUET 2023 Easy
The normal distribution curve is symmetrical about[ \(\mu=\) mean, \(\sigma=\) standard deviation]

CUET 2025 Medium
For the matrix \(A=\left[\begin{array}{ll}3 & 1 \\ 7 & 5\end{array}\right], 8 A^{-1}=\) ‾‾‾‾‾‾‾‾‾‾

CUET 2023 Hard
Which of the following is not categorized under narrowly utilitarian benefit for conserving biodiversity?

CUET 2023 Easy

Explore more questions on app