For the sequence of reactions,$A$ $\xrightarrow[{ether}]{{C_2H_5MgI}} B$ $\xrightarrow{{H_2O/H^{+}}}$ tert-Pentyl alcohol. The compound $A$ in the sequence is

The major product formed in the following reaction is:

$C_6H_5CHO + C_6H_5COCH_3 \xrightarrow[293 \ K]{OH^{-}}$ product of reaction is . . . . . . .

Identify the major product $A$ in the following reaction:
[Image of the reaction: $A$ substituted tetralin derivative with a ketone group,a chlorine atom,and a nitro group,reacting with $N_2H_4/KOH/H_2O$ (Wolff-Kishner reduction)]

For the given compound,determine the number of hydrogen atoms that are replaced by $D$ upon keeping it for a long time with $\mathop O\limits^\ominus D / D_2O$.

Identify the major product from the following reaction sequence.