Conformations of Butane

Q. why PH3+ show resonance while attached to a benzene ring but NH3+ positive does not show?

Q. Ethyl chloride and iso butyl chloride are members of homologous pairs

Q. Which of the following conformers for ethylene glycol is most stable?

1. 
2. 
3. 
4. 

Q.

Which of the following is correct order of stability?

1. Gauche > Fully Eclipsed > Anti

2. Anti > Gauche > Fully Eclipsed

3. Fully Eclipsed > Gauche > Anti

4. Anti > Fully Eclipsed > Gauche

Q. Sort the following butane conformations according to stability.

1. Anti form
2. Fully eclipsed
3. Partial eclipsed
4. Gauche form

Q.

Gauche Conformation of butane is:

1. 

2. 

3. 

4. 

Q. In the following, the most stable conformation of n-butane is:

1. 
2. 
3. 
4.