41.

Fibrous protein are not present in

• myosin

• albumins

• collagen

• fibroin

Product C is

In the reaction,

CH₃CHO $\stackrel{\left[\mathrm{O}\right]}{\to } \mathrm{A} \stackrel{\mathrm{P}, {\mathrm{Cl}}_2}{\to } \mathrm{B} \stackrel{\mathrm{KCN}}{\to } \mathrm{C} \stackrel{{\mathrm{H}}^{+}, {\mathrm{H}}_2\mathrm{O}}{\to }$ D

The end product D is

• crotonic acid

• lactic acid

• malonic acid

• tartaric acid

Inorganic preservative is

• benzoic acid

• sucrose

• vinegar

• potassium bisulphite

2-acetoxy benzoic acid is

• antiseptic

• analgesic

• antibiotic

• hypnotic

Which of the following is not present in DNA?

• Adenine

• Guanine

• Uracil

• Thymine

C₂H₂ $\underset{{\mathrm{H}}_2{\mathrm{SO}}_4, {\mathrm{H}}_2\mathrm{O}}{\overset{{\mathrm{Hg}}^{2+}}{\to }} \mathrm{A} \stackrel{\left[\mathrm{O}\right]}{\to } \mathrm{B}$

The compound B is

• an acid

• an aldehyde

• ketone

• ethanol

Hinsberg's reagent is

• benzene sulphonyl chloride

• benzene sulphonic acid

• phenyl isocyanide

• benzene sulphonamide

Which of the following does not give silver mirror test?

• HCOOH

• CH₃CH₂CHO

• CH₃CHO

• CH₃COCH₃

Cetyltrimethyl ammonium bromide (TAB) is popular is

• antioxidant

• antibiotic

• surfactant

• tranquillizer