When propyne is treated with dilute $H_2SO_4$ and $HgSO_4$,the major product is

In the reaction $CaC_2 + H_2O \to A \xrightarrow{H_2SO_4/HgSO_4} B$,what are $A$ and $B$?

The reaction $R-C \equiv C-R \xrightarrow{H_2 / \text{Lindlar's catalyst}}$ gives the major product as ..............

For the alkyne with formula $C_6H_{10}$,the number of alkynes with acidic hydrogens is $x$ and the number of alkynes with no acidic hydrogens is $y$. $x$ and $y$ are respectively:

Which one of the following compounds will react with methyl magnesium iodide?

Which of the following compounds do not react with $NaNH_2$? Why?
$CH_3-C \equiv C-CH_3, CH_3-CH_2-C \equiv CH, C_2H_5-C \equiv C-C_2H_5, HC \equiv CH, CH_3-CH=CH_2, CH_2=CH-C \equiv CH$