61.

Which among the following is a chain growth polymer?

• Nylon

• Bakelite

• Terylene

• Teflon

The step which never be involved in the dehydration of alcohol is

• protonation

• elimination

• hydride transfer

• carbanion formation

Lewisite, a chemical used inchemical warfare, is obtained from

• phosphene

• acetylene

• ethylene

• zinc phosphate

Which among the following is a catalyst for the preparation of Grignard reagent ?

• Iron powder

• Iodine powder

• Activated charcoal

• Manganese dioxide

Which of the following is not a usual method for the preparation of primary amines ?

• Hofmann's method

• Gabriel phthalimide reaction

• Curtius method

• Reductive amination of >C=O

The boiling point of ethanol is higher as compared to the boiling point of diethyl ether though both have the same molecular formula. This is due to

• resonance

• -R group

• H-bonding

• covalent bonding

The chirality of the compound

• R

• S

• Z

• E

When benzaldehyde is treated with acetic anhydride, in the presence of corresponding salt of the acid, the product obtained is

• cinnamic acid

• cinnamaldehyde

• crotonic acid

• benzillic acid

Cannizaro as well as aldol condensation reaction is given by

• benzaldehyde

• 2- methylpropanal

• 2,2-dimethylpropanal

• acetaldehyde

What is the product when nitrobenzene is treated sequentially with (i) NH₄Cl/Zn dust and (ii) H₂SO₄/ Na₂Cr₂O₇ ?

• m-chloronitrobenzene

• p-chloronitrobenzene

• nitrosobenzene

• benzene