51.

Monomers of nylon 2-nylon 6 are

• glycine and amino caproic acid

• glycine and caproic acid

• hexamethylene diamine and adipic acid

• alanine and amino caproic acid.

Maltose is made of the units

•  $\mathrm{\alpha }$-D glucose and $\mathrm{\beta }$-D glucose

•  $\mathrm{\alpha }$-D glucose and $\mathrm{\beta }$-D fructose

• $\mathrm{\alpha }$-D glucose and $\mathrm{\beta }$-D glucose

• $\mathrm{\alpha }$-D glucose and $\mathrm{\beta }$-D galactose.

Which does not give Cannizzaro reaction?

• HCHO

• ${\mathrm{C}}_6{\mathrm{H}}_5\underset{\mathrm{O}}{\underset{\parallel }{\mathrm{C}}}-\mathrm{CHO}$

• Ph-CHO

• Ph-CH₂-CHO

Which one of the following is an example for homogeneous catalysis?

• Manufacture of ammonia by Haber's process.

• Manufacture of sulphuric acid by contact process.

• Hydrogenation of oil.

• Hydrolysis of sucrose in presence of dilute hydrochloric acid.

Which one of the following is not employed as antihistamine?

• Dimetane

• Chloramphenicol

• Seldane

• Both (a) and (b

During the dehydration of alcohols to alkenes by heating with conc. H₂SO₄ the initiating step is

• elimination of water

• protonation of an alcohol molecule

• formation of an ester

• formation of carbocation.

In Clemmensen reduction, compound is treated with

• zinc amalgam + HCI

• sodium amalgam+ HCI

• zinc amalgam + HNO₄

• sodium amalgam + HNO₃

Assertion: Insulin is water soluble.

Reason: Insulin is a globular protein.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false

Assertion : (CH₃)₃CCOOH does not give HVZ reaction.

Reason: (CH₃)₃CCOOH does not have $\text{α}$-hydrogen atom.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Assertion: Natural rubber is a polymer of isoprene.

Reason: Isoprene is a pentene.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.