List of top Chemistry Questions on Chemical Reactions asked in CBSE CLASS XII

Arrange the following compounds in increasing order of their reactivity towards \( S_N2 \) displacement: 2-Bromo-2-methylbutane, 1-Bromopentane, 2-Bromopentane.

In the following pair of halogen compounds, which compound undergoes \( S_N1 \) reaction faster and why?

Assertion (A): Aromatic primary amines cannot be prepared by Gabriel Phthalimide synthesis.
Reason (R): Aryl halides do not undergo nucleophilic substitution reaction with the anion formed by phthalimide.

Write the IUPAC name of the compound: \[ \text{CH}_3-CH_2-CH(CH_3)-CH_2-CH_2-CH_3 \]

Write balanced chemical equations for the following:
(a) Reaction of white phosphorus with chlorine
(b) Reaction of orthophosphoric acid on heating

Of the \( d^4 \) species, Cr\(^{2+}\) is strongly reducing while Mn\(^{3+}\) is strongly oxidizing.

(a) In the following pair of halogen compounds, which compound undergoes \( S_N1 \) reaction faster and why?
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(b) Arrange the following compounds in increasing order of their reactivity towards \( S_N2 \) displacement: 2-Bromo-2-methylbutane, 1-Bromopentane, 2-Bromopentane.

Assertion (A): Aromatic primary amines cannot be prepared by Gabriel Phthalimide synthesis. Reason (R): Aryl halides do not undergo nucleophilic substitution reaction with the anion formed by phthalimide.