91.

Natural rubber is

• butadiene

• isoprene

• neoprene

• None of the above

Monomer of polythene is

• ethylene

• propylene

• vinyl chloride

• None of the above

Nylon obtained by the condensation of adipic acid with hexamethylene diamine

• nylon 6, 6

• nylon 7, 6

• nylon 6, 5

• nylon 9, 7

Percentage of oxygen in phenol is

• 17.02

• 15.2

• 16

• 15

C₆H₆ + Cl₂ $\stackrel{\mathrm{Sunlight}}{\to }$ Product

• BHC

• Chloro benzene

• Dichloro benzene

• None of the above

Aniline reacts with chloroform in the presence of KOH to give

• phenol

• chlorobenzene

• phenyl cyanide

• phenyl isocyanide

When methyl cyanide is hydrolysed in presence of alkali, the product is

• acetamide

• methane

• CO₂ + H₂O

• acetic acid

Which compound is not a lipid?

• Lecithin

• Lysine

• Cerebroside

• Cephalin

Which one of the following notations shows product incorrectly?

• ${}_{96}{}^{242}\mathrm{Cm} (\mathrm{\alpha }, 2\mathrm{n}) {}_{97}{}^{243}\mathrm{Bk}$

• ${}_5{}^{10}\mathrm{B} (\mathrm{\alpha }, \mathrm{n}) {}_7{}^{13}\mathrm{N}$

• ${}_7{}^{14}\mathrm{N} (\mathrm{n}, \mathrm{p}) {}_6{}^{14}\mathrm{C}$

• ${}_{14}{}^{28}\mathrm{Si} (\mathrm{d}, \mathrm{n}) {}_{15}{}^{29}\mathrm{P}$

Reduction of methyl isocyanide gives

• ethylamine

• methylamine

• dimethylamine

• trimethylamine