An organic compound of molecular formula ${\mathrm{C}}_3{\mathrm{H}}_7\mathrm{N}$ was analysed for nitrogen by Dumas method. Find the volume (in $\mathrm{mL}$) of nitrogen evolved at $\mathrm{NTP}$ from $2 \mathrm{g}$ of the substance.

How many of the following compounds exhibit tautomerism ?

How many alcohols from the following set gives geometric isomers on dehydration?

1. propan$-2-$ol

2. $2-$methyl propan$-1-$ol

3. pentan$-2-$ol

4. ethanol

5. propan$-1-$ol

6. $2-$methyl propan$-2-$ol

7. butan$-1-$ol

8. butan$-2-$ol

9. hexan$-3-$ol

How many of the following compounds will not show stereoisomerism:

Find the total number of $\mathrm{C}-\mathrm{C}$ bonds of equal length in the dianion of squaric acid,