CUET · CHEMISTRY · PYQ PAPER 2023

Positive carbylamine test is shown by :

A N-Methylaniline
B N,N-Dimethylaniline
C Triethylamine
D p-Methylbenzylamine

Verified Solution

Answer & Solution

Correct Answer

(D) p-Methylbenzylamine

Step-by-step Solution

Detailed explanation

p-Methylbenzylamine

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

Consider the following statements regarding osmotic pressure:
(A) Molar mass of a protein can be determined using the osmotic pressure method.
(B) The osmotic pressure is proportional to the molarity.
(C) Reverse osmosis occurs when a pressure larger than osmotic pressure is applied to the concentrated solution side.
(D) Edema occurs due to retention of water in tissue cells as a result of osmosis.
Choose the correct statements with reference to osmotic pressure:

CUET 2024 Medium
Answer the question on the basis of passage given below :
There are some deposits of nitrates and phosphates in the earth’s crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under laboratory conditions, but microbes do it easily. Ammonia forms a large number of complexes with transition metals. Hybridisation easily explains the ease of sigma donation capability of NH₃ and PH₃. Phosphine is an inflammable gas, it is prepared from white phosphorus.
White phosphorus on reacting with NaOH gives \(NaH _2 PO _2\) and \(PH _3\) as products. This is an example of.

CUET 2023 Medium
What is the structural formula for Freon-12.

CUET 2025 Medium
The Lucas reagent will react fastest with:

CUET 2025 Medium
According to the collision theory which one of the following statements is correct?

CUET 2025 Easy
Collision frequency is :

CUET 2023 Easy

Explore more questions on app

From CUET

The primary oocytes are arrested at which stage of meiosis before birth?

CUET 2025 Easy
The energy of a Hydrogen atom in its first excited state is

CUET 2025 Medium
Which of the following is known as Hinsberg's reagent?

CUET 2023 Hard
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 \(\text{NaNO}_2\) and \(\text{HCl}\) at 273-277 K, followed by treatment with ethyl alcohol, gives a compound B with empirical formula CH and molecular mass 78.
A is :

CUET 2023 Hard
Trichoderma species is:
(A) Free living fungi
(B) Very common in the root ecosystem
(C) Effective biocontrol agent
(D) Resistance to insects
Choose the correct answer from the options given below:

CUET 2025 Hard
A light with an energy flux of 25 \( W/cm^2 \) falls on a non-reflecting surface at normal incidence. If the surface has an area of 50 \( cm^2 \) and the total energy falling on the surface is \( 10 \times 10^5 \) J. The total duration of time of the incidence of light is

CUET 2025 Easy

Explore more questions on app