Which of the following compound of xenon has pyramidal geometry?

• XeOF₄

• XeF₂

• XeO₃

• XeF₄

42.

After adding non-volatile solute freezing point of water decreases to -0.186C. Calculate ΔT_b if K_f = 1.86 K kg mol^-1 and K_b =0.521 K kg mol^-1.

• 0.521

• 0.0521

• 1.86

• 0.0186

Adenosine is an example of

• nucleotide

• purine base

• pyrimidine base

• nucleoside

Orlon has monomeric unit

• acrolein

• glycol

• Vinyl cyanide

• Isoprene

In the given set of reactions, $2-\mathrm{bromopropane} \underset{\mathrm{Alc}./\mathrm{Heat}}{\overset{\mathrm{AgCN}}{\to }} \mathrm{X} \stackrel{{\mathrm{LiAlH}}_4}{\to } \mathrm{Y}$. The IUPC name of product Y is

• N-methylpropanamine

• N-isopropylmethanamine

• Butan-2-amine

• N-methylpropan-2-amine

The hydrolysis of optically active 2-bromobutane with aqueous NaOH result in the formation of

• (+) butan -2-ol

• (-) butan-2-ol

• (±) butan-1-ol

• (±) butan-2-ol

The distinguishing test between methanoic acid and ethanoic acid is

• litmus test

• Tollen's test

• esterficiation test

• sodium bicarbonate test

Glycogen is

• a polymer of β-D-glucose units

• a structural polysaccharide

• structurally very much similar to amylopectin

• structurally similar to amylopectin but extensively branched

. The product B is

• 

• 

• 

• None of these

The formation of cyanohydrins from a ketone is an example of

• nucleophilic substitution

• nucleophilic addition

• electrophilic addition

• electrophilic substitution