Which of the following compounds can give a positive iodoform test when treated with aqueous $KOH$ solution followed by potassium hypoiodite?

The major product of the following reaction is:

The reaction of $1-$chlorobutane with alcoholic potassium hydroxide $(KOH)$ yields .....................

Which of these does not form a Grignard reagent?

On what factors does the rate (reactivity) of the $S_{N}1$ reaction depend? Explain with suitable examples.

Given below are two statements:
Statement $I$: $(CH_3)_3C-CH_2-Cl$ will undergo $S_N1$ reaction even though it is a primary halide.
Statement $II$: It will not undergo $S_N2$ reaction very easily even though it is a primary halide.
In the light of the above statements,choose the most appropriate answer from the options given below: