In the given hydrocarbon, 

 
The state of hybridization of carbons 1, 3, and 5 are:

1. sp², sp, sp³

2. sp, sp³, sp²

3. sp, sp², sp³

4. sp³, sp², sp

The molecule among the following that has the hybridization ${\mathrm{sp}}^2, {\mathrm{sp}}^2, \mathrm{sp},\; and \mathrm{sp}$ from left to right atoms is:

1. $\mathrm{HC}\equiv \mathrm{C}-\mathrm{C}\equiv \mathrm{H}$

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

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

4. ${\mathrm{CH}}_2-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

The C – H bond and C – C bond in ethane are formed by overlapping of -

1. ${\mathrm{sp}}^3-\mathrm{s} \mathrm{and} {\mathrm{sp}}^3-{\mathrm{sp}}^3$

2. ${\mathrm{sp}}^2-\mathrm{s} \mathrm{and} {\mathrm{sp}}^2-{\mathrm{sp}}^2$

3. sp – sp and sp – sp 

4. p–s and p – p

A compound possessing optical isomerism provided it has the molecular formula C₇H₁₆, would be:

The compound that has least hindered rotation around carbon-carbon bond is-

Arrange the following carbanions in order of their decreasing stability:

A. \(\mathrm{H}_3 \mathrm{C}-\mathrm{C} \equiv \mathrm{C}^{-}\)
B. \(\mathrm{H}-\mathrm{C} \equiv \mathrm{C}^{-}\)
C. \(\mathrm{H}_3 \mathrm{C}-\mathrm{\bar{C}H_2}\)

1. A>B>C

2. B>A>C

3. C>B>A

4. C>A>B

An organic molecule necessarily shows optical activity if it -

1. Contains asymmetric carbon atoms

2. Is non-planar

3. Is non-superimposable on its mirror image

4. Is superimposable on its mirror image

An alkene among the following that reacts fastest with H₂ under catalytic conditions is -

1.		2.
3.		4.

The most stable conformation of the product of the following reaction is:

1.		2.
3.		4.