The correct order of –I effect is:

IUPAC  name of  is: 

1. 2-Chloro-3-iodo-2-pentene

2. 2-Chloro-3-iodo-3-pentene

3.  2-Iodo-3-chloro-pentene

4.  None of the above

Which of the following is most reactive towards electrophilic substitution reaction?

1.		2.
3.		4.

The chiral centre is absent in:

1. DCH₂-CH₂-CH₂-Cl

2. CH₃-CHD-CH₂-Cl

3. CH₃-CHCl-CH₂D$\mathrm{<mspace\; width="1em"></mspace>\; <mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>}$

4. CH₃-CHOH-CH₂-CH₃

The structure of trans-2-hexenal among the following is:

1.
2.
3.
4.	None of the above

The chiral compound among the following is:

Polarisation of electrons in acrolein may be written as:

1.  $\stackrel{+\delta }{C}{H}_2=CH-\stackrel{-\delta }{C}HO$

2.  $\stackrel{-\delta }{C}{H}_2=CH-\stackrel{+\delta }{C}HO$

3.  $\stackrel{-\delta }{C}{H}_2=CH-\stackrel{}{C}\stackrel{+\delta }{H}O$

4.  $\stackrel{+\delta }{C}{H}_2=CH-CH\stackrel{-\delta }{O}$

The correct order of stability is:

2-Butene shows geometrical isomerism due to:

1. Restricted rotation about double bond

2. Free rotation about double bond

3. Free rotation about single bond

4. Chiral carbon

Find the dihedral angle in the staggered form of ethane.

1. $0°$

2. $120°$

3. $60°$

4. $180°$