81.

DDT is related to

• insecticide

• fungicide

• chlorination

• florination

Number of peptide bonds in dipeptide is

• 2

• 1

• 3

• 4

Blood sugar is

• fructose

• maltose

• haemoglobin

• glucose

Lactose sugar is formed from

• d-galactose

• d-glucose

• d-galactose and d-glucose

• d-glucose and d-fructose

Vitamin-B₁₂ contains

• CO

• Fe

• Zn

• Ca

Night blindness is caused due to the deficiency of

• B₁₂

• A

• C

• D

RNA does not contain

• thymine

• adenine

• guanine

• uracil

Reaction of dry HCl with acetone gives

• aldol

• chloritone

• isopropyl alcohol

• None of the above

C₂H₅OH $\underset{\mathrm{NaOH}}{\overset{{\mathrm{I}}_2}{\to }} \mathrm{A} \underset{\mathrm{KOH}}{\overset{\mathrm{Aqueous}}{\to }}$ B

In equation given above A and B respectively are:

• CHI₃ and HCOOK

• CHI₃ and CH₃COOK

• CH₄ and HCOOK

• CHI₃ and H₂

Trioxane has the formula , it is prepared from

• formaldehyde

• methanol

• dichloromethane

• vinyl alcohol