The number of chiral carbon atoms in the given compound is are

1. 2

2. 3

3. 4

4. 1

In the following reaction, 

${\mathrm{CH}}_3\mathrm{CHO}+\mathrm{HCN}\to {\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{OH}\right)\mathrm{CN}\stackrel{{\mathrm{H}}^{+}/{\mathrm{H}}_2\mathrm{O}}{\to } {\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{OH}\right)\mathrm{COOH}$

an asymmetric center is generated. The acid obtained would be

1. L-isomer
2. D-isomer
3. 20% D+ 80% L-isomer
4. 50% D+ 50 % L-isomer

Hybridization ${\mathrm{sp}}^2-{\mathrm{sp}}^2-\mathrm{sp}-\mathrm{sp}$ is applicable on a set among the following from left to right is -

1. ${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{C}\equiv \mathrm{CH}$

2. $\mathrm{CH}\equiv \mathrm{C}-\mathrm{C}\equiv \mathrm{N}$

3. ${\mathrm{CH}}_2=\mathrm{C}=\mathrm{C}={\mathrm{CH}}_2$

4. 

The hydrocarbons having the lowest dipole moment among the following is:

1. 

2. CH₃ - C ≡ C - CH₃

3. CH₃ CH₂ CH = CH₂

4. CH₂ = CH - C ≡ CH

In the compound, ${\mathrm{CH}}_2=\mathrm{CH}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{C}\equiv \mathrm{CH},$ the ${\mathrm{C}}_2-{\mathrm{C}}_3$ bond is of the type

1. $\mathrm{sp}-{\mathrm{sp}}^2$

2. ${\mathrm{sp}}^3-{\mathrm{sp}}^3$

3. $\mathrm{sp}-{\mathrm{sp}}^3$

4. ${\mathrm{sp}}^2-{\mathrm{sp}}^3$

An organic compound ${\mathrm{C}}_4{\mathrm{H}}_8\mathrm{O}$ is found to be optically active. Which of the following is the correct structure of the given compound?

1. ${(\mathrm{CH}}_{}$₃)2CHCHO

2. ${\mathrm{CH}}_2 = \mathrm{CH} — \mathrm{CH}\left(\mathrm{OH}\right){\mathrm{CH}}_3$

3. ${\mathrm{CH}}_3{\mathrm{COCH}}_2{\mathrm{CH}}_3$

4. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{CHO}$

The number of optical isomers formed by hydrogenation of the compound, ${(\mathrm{CH}}_{}$₃)2C=CHCH3 are

1. 0

2. 1

3. 2

4. 3

The number and type of bonds between two carbon atoms in ${\mathrm{CaC}}_2$ are

1. One sigma and one $\mathrm{\pi }$ bond

2. One sigma and two $\mathrm{\pi }$ bond

3. One sigma and one and a half $\mathrm{\pi }$ bonds

4. One sigma bond

Which of the following has the least hindered rotation about carbon-carbon bond?

1. Ethane

2. Ethylene

3. Acetylene

4. Hexachloroethane

The Cl — C — Cl angles in 1,1,2,2-tetrachloroethene and tetrachloromethane will be about :

1. $120°$ $\mathrm{and}$ $109.5°$

2. $90°$ $\mathrm{and}$ $109.5°$

3. $109.5°$ $\mathrm{and}$ $90°$

4. $109.5°$ $\mathrm{and}$ $120°$