31.

Bactericidal antibiotic is

• ofloxacin

• chloramphenicol

• erythromycin

• tetracycline

Which of the following can absorb over 90% of its own mass of water and also does not stick to wounds?

• Saran

• Thiokol

• Rayon

• Gun cotton

Phenol gives characteristic colouration with

• iodine solution

• bromine water

• aqueous FeCl₃ solution

• ammonium hydroxide

The prosthetic group of haemoglobin is

• porphin

• globulin

• haem

• gelatin

Ziegler-Natta catalyst catalyses preparation of which of the following compounds?

• Preparation of Ti-metal

• Preparation of low density plastic

• Preparation of high resistance plastic

• Preparation of high density plastic

$2, 2-\mathrm{dichloropropane} \stackrel{\mathrm{Aq}. \mathrm{KOH} }{\to } \mathrm{A} \stackrel{\mathrm{Clemmensen} \mathrm{reduction}}{\to } \mathrm{B}, \mathrm{B} \mathrm{is}$

• propanol

• propene

• propane

• ethane

$$\begin{gathered} \mathrm{CH}\equiv \mathrm{CH} \stackrel{\mathrm{HCl} \mathrm{excess}}{\to } \mathrm{A} \underset{∆}{\overset{\mathrm{Hydrolysis}}{\to }} \mathrm{B} \underset{\mathrm{Na}-\mathrm{Hg}/ {\mathrm{H}}_2\mathrm{O}}{\overset{\mathrm{Reduction}}{\to }} \mathrm{C} \\ \mathrm{compound} \mathrm{C} \mathrm{is} \end{gathered}$$

• ethanal

• propenal

• ethanol

• 2-methyl butan-1-ol

The rate of S_N2 reaction is maximum when the solvent is

• CH₃OH

• H₂O

• DMSO

• Benzene

In the following sequence of reactions

The compound C formed will be

• butanol-1

• butanol-2

• 2-methyl propanol-1

• 1, 1-dimethylethanol

Which alcohol will give immediate turbidity on shaking with HCl at room temperature?

• 3-methyl pentan-2-ol

• 2-methyl butan-1-ol

• Butan-3-ol

• 2-methylpropan-2-ol