At normal temperature,iodoform is:

In which of the following cases is the yield via $S_{N}2$ mechanism maximum?

Consider the following four reactions: $(I) C_6H_5-CHCl-CH_3 \xrightarrow{95\% \text{ acetone}, 5\% \text{ water}} C_6H_5-CH(OH)-CH_3$ $(II) C_6H_5-CHCl-CH_3 \xrightarrow{90\% \text{ acetone}, 10\% \text{ water}} C_6H_5-CH(OH)-CH_3$ $(III) C_6H_5-CHCl-CH_3 \xrightarrow{80\% \text{ acetone}, 20\% \text{ water}} C_6H_5-CH(OH)-CH_3$ $(IV) C_6H_5-CHCl-CH_3 \xrightarrow{100\% \text{ water}} C_6H_5-CH(OH)-CH_3$ Arrange these reactions in decreasing order of the proportion of inverted product and select the correct answer from the codes given below:

The major product formed in the following reaction is
$1,2-dichloro-3-methyl-5-nitrocyclopentane$ $\xrightarrow[{Heat}]{{NaOCH_3(1 \ eq.)}}$ ?

The graph which represents the following reaction is :
$(C_6H_5)_3C-Cl \xrightarrow{OH^{-} / \text{Pyridine}} (C_6H_5)_3C-OH$

Which information below regarding this reaction is applicable?
$CH_3-O-CH_2-Cl \xrightarrow{aq. OH^-, \Delta} CH_3-O-CH_2-OH$