Which of the following statements is not correct?

The major products $P$ and $Q$ are

Total number of possible isomers (both structural as well as stereoisomers) of cyclic ethers with the molecular formula $C_4H_8O$ is:

Which of the following compounds will give a tribromo derivative upon reaction with bromine water?

Which of the following statements are correct for phenol?
$(A)$ In general,phenol is more acidic than alcohol.
$(B)$ Phenol is used in the production of melamine plastic.
$(C)$ Phenol gives violet colour with neutral ferric chloride solution.
$(D)$ Phenol when heated with acetyl chloride gives phenetole.

Which of the following reactions will yield $2-propanol$? Select the correct answer from $a, b, c$ and $d$.
$I. \, CH_2 = CH - CH_3 + H_2O \xrightarrow{H^+} $
$II. \, CH_3 - CHO \xrightarrow[(ii) \, H_2O]{(i) \, CH_3MgI} $
$III. \, CH_2O \xrightarrow[(ii) \, H_2O]{(i) \, C_2H_5MgI} $
$IV. \, CH_2 = CH - CH_3 \xrightarrow{KMnO_4} $