151.

Acetylene and HCHO react in presence of copper acetylide catalyst to form

• But-2-yne-1, 2-diol

• But-1-yne-1, 4-diol

• But-2-ene-1, 4-diol

• 2-butyne-1, 4-diol

Which of the following substance is not related with HVZ reaction?

• α-bromo acetic acid

• Zn/ Hg

• Cl₂

• Red P

Which of the following compound show acidic nature?

• but-1-yne

• but-2-yne

• but-1-ene

• buta-1, 3-diene

Compound A on ozonolysis gives acetone and glyoxal. The compound A is

• 2, 5-dimethyl hex-2, 4-dene

• 2, 5-dimethyl hex-1, 5-diene

• 2, 5-dimethyl hex-3, 4-diene

• 2, 5-dimethyl but-2, ene

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{C}\equiv \mathrm{CH}\underset{\mathrm{B}}{\overset{\mathrm{A}}{\rightleftharpoons }} {\mathrm{CH}}_3\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3$, A and B are

• alc KOH and SeO₂

• NaNH₂ and lindlar catalyst

• alc KOH and NaNH₂

• Lindlar catalyst and NaNH₂

Tetrabromoethane on heating with Zn gives

• ethyl bromide

• ethane

• ethyne

• ethene

Which compound does not form 2-methyl but-2-ene on heating with alc. KOH?

• 1-bromo-2 methyl propane

• 2-bromo-3-methyl butane

• 2-bromo-2-methyl butane

• None of the above

In the reaction,

$\mathrm{Acetylene} \underset{{\mathrm{NH}}_4\mathrm{Cl}}{\overset{\mathrm{CuCl}}{\to }} {\mathrm{H}}_2\mathrm{C}=\mathrm{CH}-\mathrm{C}\equiv \mathrm{CH}\stackrel{\mathrm{Lindlar}\text{'}\mathrm{s} \mathrm{catalyst}(\mathrm{Pd}/{\mathrm{CaCO}}_3)}{\to }\mathrm{A}$

The final product A is:

• butene

• butyne-2

• butyne-1

• buta-1, 3-dene

The olefin which on ozonolysis gives CH₃CH₂CHO and CH₃CHO is

• 2-butene

• 1-pentene

• 1-butene

• 2-pentene

Which one of the following alkenes will react faster with H₂ under catalytic hydrogenation conditions?