Chapter 1

The dominant species obtained when is dissolved in ${\mathrm{H}}_2\mathrm{O}$ at $\mathrm{pH}=2,\mathrm{pH}=7$ and at $\mathrm{pH}=12$

Salicyclic acid in aqueous $\mathrm{NaOH}$ exist as

The most acidic compound is (A) $\mathrm{HCOOH}$ (B) $\mathrm{Ph}-\mathrm{COOH}$ (C) ${\mathrm{CH}}_3-\mathrm{COOH}$ (D) ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{OH}$

$p{K}_b$ of compound would be lowest when -Me group is substituted at (A) Ortho (B) Meta (C) Para (D) Both ortho

Which of the following will highly increase acidity of phenol? (A) Alkylation of phenol (B) Nitration of phenol (C) Chlorination of phenol (D) Acylation of phenol

The correct acidic strength order is Pentane-2,4-dione $$ Pentan-2-ol $$ 1-Pentyne $$ 1-Pentene (A) $\mathrm{II}>\mathrm{I}>\mathrm{III}>\mathrm{IV}$ (B) $\mathrm{I}>\mathrm{II}>\mathrm{III}>\mathrm{IV}$ (C) II > III > I > IV (D) III > II > I > IV

What species will be formed if one equivalent of $\mathrm{HCl}$ is added to ${\mathrm{HOCH}}_2{\mathrm{CH}}_2{\mathrm{NH}}_2?$ (A) $[{\mathrm{H}}_2\stackrel{\oplus }{\mathrm{O}}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{NH}}_2]{\mathrm{Cl}}^{-}$ (B) $\mathrm{Cl}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{NH}}_2$ (C) (D) $\mathrm{HO}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\stackrel{\oplus }{\mathrm{N}}{\mathrm{H}}_3{\mathrm{Cl}}^{-}$

The pair in which compound-I contains higher resonance energy than compound-II is

A compound of molecular formula $\left({\mathrm{C}}_8{\mathrm{H}}_6{\mathrm{O}}_4\right)$ is a benzene dicarboxylic acid which can form anhydride on heating. The correct statement regarding this compound is (A) Most acidic among all isomeric dicarboxylic acid (B) Less acidic than ${\mathrm{CH}}_3\mathrm{COOH}$ (C) Less acidic than $\mathrm{PhCOOH}$ (D) None of these

The given order is not a correct for their: $${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{CH}={\mathrm{CH}}_2>{\mathrm{CH}}_2={\mathrm{CH}}_2$$ (A) Heat of hydrogenation (B) Bond length of $\mathrm{C}=\mathrm{C}$ bond (C) Heat of hydrogenation per mole of ${\mathrm{H}}_2$ (D) Heat of combustion