JEE Main 2024 (Online) 1st February Morning Shift | Practical Organic Chemistry Question 20 | Chemistry

1

JEE Main 2024 (Online) 1st February Morning Shift

MCQ (Single Correct Answer)

+4

-1

In Kjeldahl's method for estimation of nitrogen, $\mathrm{CuSO}_4$ acts as :

A

catalytic agent

B

hydrolysis agent

C

reducing agent

D

oxidising agent

2

JEE Main 2024 (Online) 1st February Morning Shift

MCQ (Single Correct Answer)

+4

-1

Given below are two statements :

Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution.

Statement (II) : In this titration phenolphthalein can be used as indicator.

In the light of the above statements, choose the most appropriate answer from the options given below :

A

Both Statement I and Statement II are correct

B

Statement I is incorrect but Statement II is correct

C

Both Statement I and Statement II are incorrect

D

Statement I is correct but Statement II is incorrect

3

JEE Main 2024 (Online) 31st January Evening Shift

MCQ (Single Correct Answer)

+4

-1

The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. A suitable method for the extraction of these oils from the flowers is -

A

distillation

B

steam distillation

C

distillation under reduced pressure

D

crystallisation

4

JEE Main 2024 (Online) 31st January Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II

	List - I (Technique)		List - II (Application
(A)	Distillation	(I)	Separation of glycerol from spent-lye
(B)	Fractional distillation	(II)	Aniline - Water mixture
(C)	Steam distillation	(III)	Separation of crude oil fractions
(D)	Distillation under reduced pressure	(IV)	Chloroform - Aniline

Choose the correct answer from the options given below:

A

A-I, B-II, C-IV, D-III

B

A-II, B-III, C-I, D-IV

C

A-IV, B-I, C-II, D-III

D

A-IV, B-III, C-II, D-I