1
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

When $1 \mathrm{dm}^3$ of CO2 gas is passed over hot coke the volume of gaseous mixture after complete reaction at STP becomes $1.4 \mathrm{dm}^3$. The composition of the gaseous mixture at STP is :

A

$0.8 \mathrm{dm}^3$ of $\mathrm{CO}, 0.8 \mathrm{dm}^3$ of $\mathrm{CO}_2$

B

$0.8 \mathrm{dm}^3$ of $\mathrm{CO}, 0.6 \mathrm{dm}^3$ of $\mathrm{CO}_2$

C

$0.6 \mathrm{dm}^3$ of $\mathrm{CO}, 0.8 \mathrm{dm}^3$ of $\mathrm{CO}_2$

D

$0.6 \mathrm{dm}^3$ of $\mathrm{CO}, 0.4 \mathrm{dm}^3$ of $\mathrm{CO}_2$

2
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

The major product Z formed in the following sequence of reactions is

NEET 2026 Chemistry - Organic Compounds Containing Nitrogen Question 2 English
A

$\mathrm{C}_2 \mathrm{H}_5 \mathrm{NO}_2$

B

$\mathrm{C}_2 \mathrm{H}_5-\mathrm{N}=\mathrm{N}-\mathrm{OH}$

C

$\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$

D

$\mathrm{C}_2 \mathrm{H}_5 \mathrm{NH}_2$

3
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below is an expression for the rate constant of a first-order reaction occurring at a certain temperature, $\mathrm{T}(\mathrm{K})$.

$$ \operatorname{lnk}=14.34-\frac{1.25 \times 10^4}{T} $$

The energy of activation in $\mathrm{kcal} \mathrm{mol}^{-1}$ for the reaction is :

(Given: $\mathrm{k}^{-1} \mathrm{~s} \mathrm{~s}^{-1}, \mathrm{R}=1.987 \mathrm{cal} \mathrm{mol}^{-1} \mathrm{~K}^{-1}$ )

A

24.84

B

14.34

C

18.63

D

12.42

4
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language
Given below are certain reactions. Identify the reaction for which $K_P \neq K_C$.
A

$\mathrm{H}_2 \mathrm{O}(\mathrm{g})+\mathrm{CO}(\mathrm{g}) \rightleftharpoons \mathrm{H}_2(\mathrm{~g})+\mathrm{CO}_2(\mathrm{~g})$

B

$\mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_3(\mathrm{~g})$

C

$\mathrm{H}_2(\mathrm{~g})+\mathrm{I}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{g})$

D

$\mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g})$