Which of the following compounds on hydration (addition of $H_2O$) with $H_2SO_4/HgSO_4/H_2O$ gives an aldehyde as the major product?

Carbon-carbon bond length is minimum in

The products of the reaction $CH_3 - C \equiv C - CH_2CH_3 \xrightarrow[(ii) \text{ Hydrolysis}]{(i) O_3}$ are .....

Schemes $1$ and $2$ describe the sequential transformation of alkynes $M$ and $N$. Consider only the major products formed in each step for both the schemes.
$1.$ The product $X$ is:
$2.$ The correct statement with respect to product $Y$ is:
$(A)$ It gives a positive Tollens test and is a functional isomer of $X$.
$(B)$ It gives a positive Tollens test and is a geometrical isomer of $X$.
$(C)$ It gives a positive iodoform test and is a functional isomer of $X$.
$(D)$ It gives a positive iodoform test and is a geometrical isomer of $X$.

Which compound will react with an aqueous solution of $Ag(NH_3)_2^+ OH^-$?

Which of the following gases is used for welding?