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

$$ \text { The correct formal charges on oxygen atoms numbered } 2,1 \text { and } 3 \text { respectively are : } $$

NEET 2026 Chemistry - Chemical Bonding and Molecular Structure Question 2 English
A

$-1,0,+1$

B

$0,+1,-1$

C

$0,0,0$

D

$+1,0,-1$

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

Phenolphthalein is used as an indicator for the titration of sodium hydroxide solution against a standard solution of oxalic acid. The colour change that is observed at an alkaline pH close to the equivalence point during this titration is:

A

pinkish red to yellow

B

yellow to pinkish red

C

pink to colourless

D

colourless to pink

3
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 $\mathrm{CO}_2$

4
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

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