The correct order of –I effect is:

1. -NR₃⁺ > -OR  > -F

2. -F > -NR₃⁺ > -OR  

3.-NR₃⁺ > -F  > -OR  

4. -OR  > -NR₃⁺ > -F

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$\mathrm{ \; }$

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

Dihedral angle in staggered form of ethane is:

1. $0°$

2. $120°$

3. $60°$

4. $180°$