The two structures written below represent

• pair of diastereomers

• pair of enantiomers

• same molecule

• both are optically inactive

Which of the following carbocations will be most stable ?

• ${\mathrm{Ph}}_3{\mathrm{C}}^{+}$

• ${\mathrm{CH}}_3-\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2$

• $({\mathrm{CH}}_3{)}_2\stackrel{+}{\mathrm{C}}\mathrm{H}$

• ${\mathrm{CH}}_2=\mathrm{CH}-\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2$

A compound is formed by substitution of two chlorine for two hydrogens in propane. The number of possible isomeric compounds is

• 4

• 3

• 2

• 5

1 mole of methyl amine on reaction with nitrous acid gives at NTP

• 1.0 L of nitrogen

• 22.4 L of nitrogen

• 11.2 L of nitrogen

• 5.6 L of nitrogen

The major product P in the following reaction is

CH₃-CH=CH₂ $\underset{\mathrm{Peroxide}}{\overset{\mathrm{HI}}{\to }}$ P

• CH₃CH₂CH₂I

• CH₃-CH(I)-CH₃

• CH₂(I)-CH=CH₂

• CH₂(I)-CH₂(I)

Which of the following will exhibit cis-trans isomerism?

• CH₂Br-CH₂Br

• CBr₃ - CH₃

• CHBr = CHBr

• CBr₂= CH₂

The IUPAC name of CH₃-CH=CH-C≡CH is

• pent-3-en-1-yne

• pent-3-en-4-yne

• pent-2-en-4-yne

• pent-2-en-3-yne

The correct IUPAC name of  is

• 1-cyclopropyl cyclobutane

• 1, 1-dicyclobutane

• 1-cyclobutane- 1- cyclopropane

• none of the above

Geometrical isomerism is possible in

• acetone- oxime

• isobutene

• acetophenone-oxime

• benzophenone-oxime

IUPAC name of the following compound is:

CH₃CH₂C(Br) = CH - Cl

• 2-bromo-1-chloro butene

• 1-chloro-2-bromo butene

• 3-chloro-2-bromo butene-2

• none of the above