11.

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?

The metal X is prepared by the electrolysis of fused chloride. It reacts with hydrogen to forma colourless solid from which hydrogen is released on treatment with water. The metal is

• Al

• Ca

• Cu

• Zn

Which of the following is the most reactive towards ring nitration?

• Benzene

• Toluene

• Mesitylene

• m-xylene

Compounds (A) gives two mol acetone and glyoxal on ozonolysis?

• 2, 5-dimethyl hexyne

• 2, 5-dmethyl hex-3-ene

• 2, 5-dimethyl hex-2-yne

• 2, 5-dimethyl hexa-2, 4-diene

The degree of unsaturation of C₆H₆ and butyne-2 respectively are

• 6 and 3

• 6 and 2

• 2 and 6

• 4 and 2

The length of unit cell edge of a body-centred cubic metal crystal is 352 pm. The radius of metal atom is

• 162.4 pm

• 152.4 pm

• 142.4 pm

• 156.pm

The half-life of a radioactive element depends upon

• amount of element

• temperature

• pressure

• independent