Chapter 12

The treatment of \(\mathrm{CH}_{3} \mathrm{MgX}\) with \(\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{C}-\mathrm{H}\) produces: (a) \(\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}\) (b) \(\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3}\) (c) (d) \(\mathrm{CH}_{4}\)

Toluene in nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotized and then heated with cuprous bromide. The reaction mixture so formed contains: (a) Mixture of o- and p-bromotoluenes (b) Mixture of o- and p-dibromobenzenes (c) Mixture of o- and p-bromoanilines (d) Mixture of o- and m-bromotoluenes

In the following sequence of reactions, the alkene affords the compound ' \(\mathrm{B}\) ' \(\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHCH}_{3} \stackrel{\mathrm{O}_{3}}{\longrightarrow}(\mathrm{A}) \stackrel{\mathrm{H}_{2} \mathrm{O}}{\mathrm{Zn}}\) The compound (B) is (a) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHO}\) (b) \(\mathrm{CH}_{3} \mathrm{COCH}_{3}\) (c) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{3}\) (d) \(\mathrm{CH}_{3} \mathrm{CHO}\)

The hydrocarbon which can react with sodium in liquid ammonia is: (a) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}\) (b) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CH}\) (c) \(\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHCH}_{3}\) (d) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CCH}_{2} \mathrm{CH}_{3}\)

Which of the following most readily undergoes \(\mathrm{E} 2\) elimination with a strong base? (a) 2 - bromo - 3 - methylbutane (b) 2 - bromopentane (c) 2 - bromo-2-methylbutane (d) 1 - bromo- 2,2 - dimethylpropane

The correct decreasing order towords reaction with HBr for the given all kones is given as: C=C(C)C C=C(C)OC 1 2 C=C(C)NC 3 4 (a) \(3>1>2>4\) (b) \(3>2>1>4\) (c) \(2>3>1>4\) (d) \(4>2>1>3\)

2- methyl pent \(-2\) - ene on ozonolysis gives: (a) Propanal only (b) Propanal and methanal (c) Propan \(-2\) - one and propanal (d) Propan \(-2\) - one and ethanal

Hexa 2,4 di-one on ozonolysis by using \(\mathrm{O}_{3} / \mathrm{CCl}_{4}\) following by \(\mathrm{H}_{2} \mathrm{O} / \mathrm{Zn}\) gives: (a) Acetaldehyde (b) Glyoxal (c) Formaldehyde (d) Both A and B