1
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statement :

Statements I : Bromination of phenol in solvent with low polarity such as $$\mathrm{CHCl}_3$$ or $$\mathrm{CS}_2$$ requires Lewis acid catalyst.

Statements II : The Lewis acid catalyst polarises the bromine to generate $$\mathrm{Br}^{+}$$.

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

A
Statement I is true but Statement II is false
B
Both Statement I and Statement II are true
C
Statement I is false but Statement II is true
D
Both Statement I and Statement II are false
2
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The incorrect postulates of the Dalton's atomic theory are :

(A) Atoms of different elements differ in mass.

(B) Matter consists of divisible atoms.

(C) Compounds are formed when atoms of different element combine in a fixed ratio.

(D) All the atoms of given element have different properties including mass.

(E) Chemical reactions involve reorganisation of atoms.

Choose the correct answer from the options given below :

A
(B), (D) only
B
(A), (B), (D) only
C
(B), (D), (E) only
D
(C), (D), (E) only
3
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement I : Nitration of benzene involves the following step -

JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Hydrocarbons Question 22 English

Statement II : Use of Lewis base promotes the electrophilic substitution of benzene.

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 incorrect
B
Statement I is correct but Statement II is incorrect
C
Statement I is incorrect but Statement II is correct
D
Both Statement I and Statement II are correct
4
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following gives a positive test with ninhydrin ?

A
Polyvinyl chloride
B
Cellulose
C
Egg albumin
D
Starch
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