Which of the following compounds will give a yellow precipitate with iodine and alkali?

Predict the major product of the following reaction:
$1,3$-benzodioxole $\xrightarrow[(ii) CHCl_3, NaOH]{(i) HI \text{ (excess)}}$ ?

Benzene on reaction with acetyl chloride in the presence of anhydrous $AlCl_3$ gave the product $P$. The product $P$ on reaction with methyl magnesium bromide followed by treatment with water furnished the product $Q$. The molecular formula of $Q$ is

Ketones react with $Mg-Hg$ followed by treatment with water to give:

An alkene $A$ $(C_4H_8)$ exhibits cis/trans isomerism. $A$ on ozonolysis gives $B$,which when reacted with $NaOH$ followed by hydroxylamine gives $C$. What are $B$ and $C$?

Predict the product $X$ for the following reaction:
$2\text{-oxocyclohex-3-en-1-yl} \text{ acetate derivative} \rightarrow{NaBH_4, MeOH} X$