1
JEE Main 2025 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement (I): In partition chromatography, stationary phase is thin film of liquid present in the inert support.

Statement (II): In paper chromatography, the material of paper acts as a stationary phase.

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

Statement I is false but Statement II is true

C

Both Statement I and Statement II are false

D

Both Statement I and Statement II are true

2
JEE Main 2025 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

0.1 M solution of KI reacts with excess of $\mathrm{H}_2 \mathrm{SO}_4$ and $\mathrm{KIO}_3$ solutions. According to equation

$$ 5 \mathrm{I}^{-}+\mathrm{IO}_3^{-}+6 \mathrm{H}^{+} \rightarrow 3 \mathrm{I}_2+3 \mathrm{H}_2 \mathrm{O} $$

Identify the correct statements :

(A) 200 mL of KI solution reacts with 0.004 mol of $\mathrm{KIO}_3$

(B) 200 mL of KI solution reacts with 0.006 mol of $\mathrm{H}_2 \mathrm{SO}_4$

(C) 0.5 L of KI solution produced 0.005 mol of $\mathrm{I}_2$

(D) Equivalent weight of $\mathrm{KIO}_3$ is equal to ( $\frac{\text { Molecular weight }}{5}$ )

Choose the correct answer from the options given below :

A

(C) and (D) only

B

(A) and (B) only

C

(B) and (C) only

D

(A) and (D) only

3
JEE Main 2025 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The type of oxide formed by the element among Li, Na, Be, Mg, B and Al that has the least atomic radius is :

A

AO

B

AO2

C

A2O

D

A2O3

4
JEE Main 2025 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which one of the following reaction sequences will give an azo dye?

A
JEE Main 2025 (Online) 29th January Evening Shift Chemistry - Compounds Containing Nitrogen Question 22 English Option 1
B
JEE Main 2025 (Online) 29th January Evening Shift Chemistry - Compounds Containing Nitrogen Question 22 English Option 2
C
JEE Main 2025 (Online) 29th January Evening Shift Chemistry - Compounds Containing Nitrogen Question 22 English Option 3
D
JEE Main 2025 (Online) 29th January Evening Shift Chemistry - Compounds Containing Nitrogen Question 22 English Option 4
JEE Main Papers
2023
2021
EXAM MAP