Of the following,which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

What is the product obtained when $m$-chlorobenzaldehyde is treated with a $50\% KOH$ solution?

Which of the following reducing reagents will be suitable for the conversion shown below?
(Structure: $3-$methylcyclohexanone to methylcyclohexane)

For the sequence of reactions $A$ $\xrightarrow{C_2H_5MgI} B$ $\xrightarrow{H_2O / H^{+}} \text{tert-pentyl alcohol}$. The compound $A$ in the sequence is

An organic compound having the molecular formula $C_8H_{10}O$ on being heated with $I_2$ and dilute $NaOH$ gives a yellow precipitate. The expected compound is

Which of the following is the structural formula of mesityl oxide?