The prefix name of -SH group in the IUPAC system is:

1. mercapto             
2. thiol
3. sulfide 
4. None of these

Which of the following will exhibit chirality?             

(1) 2-methyl hexane

(2) 3-methyl hexane

(3) Neopentane

(4) Isopentane

The property by virtue of which a compound can turn the plane of polarization of light is known as:

(1) photolysis              (2) phosphorescence

(3) optical activity           (4) polarization

How many primary carbon atoms are there in the compound,

(a) 6               (b) 2

(c) 4               (d) 3

The (R)- and (S)-enantiomers of an optically active compound differ in

(1) their solubility in a chiral solvent

(2) their reactivity with a chiral reagent

(3) their optical rotation of plane polarised light

(4) their melting points

The cylindrical shape of an alkyne is due to 

(1) three sigma C-C bonds

(2) three π C-C bonds

(3) two sigma C-C and one π C-C bonds

(4) one sigma C-C and two π C-C bonds

Maximum enol content is in 

1. 

2.

3.

4. 

Which order for basic character of amine is correct for following compounds?

1. 3>1>2>5>4              2. 3>2>1>5>4

3. 3>1>2>4>5              4. 3>2>1>4>5

Which of the following is the most stable carbocation

1. 

2. 

3. ${\mathrm{CH}}_2=\mathrm{CH}-\stackrel{\oplus }{\mathrm{C}}{\mathrm{H}}_2$

4. ${\mathrm{CH}}_2=\stackrel{\oplus }{\mathrm{C}}\mathrm{H}$

In the following compounds

The order of acidity is

1. III>IV>I>II              2. I>IV>III>II

3. II>I>III>IV              4. IV>III>I>II