The optically active alkane with lowest molar mass is:

1. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{C}\equiv \mathrm{CH}$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2-\stackrel{{\mathrm{CH}}_3}{\stackrel{|}{\mathrm{CH}}}-{\mathrm{CH}}_3$

3. 

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

a-D-(+)-glucose and β-D-(+)-glucose are :

(a) enantiomers

(b) conformers

(c) epimers

(d) anomers

The IUPAC name of the compound

is....

1. 3-keto-2-methylhex-4-enal

2. 5-formylhex-2-en-3-one

3. 5-methyl-4-oxohex-2-en-5-al

4. 3-keto-2-methylhex-5-enal

The correct order of strengths of the carboxylic acids :-


(a) I>II>III
(b) II>III>I
(c) III>II>I
(d) lI>I>IlI

Given,

Which of the given compounds can exhibit tautomerism?

(1) I and II            

(2) I and III

(3) II and III           

(4) I, II and III

Which of the following statements is not correct for a nucleophile?

(1) Nucleophile is a Lewis acid

(2) Ammonia is a nucleophile

(3) Nucleophiles attack low electrons density sites

(4) Nucleophiles are not electron seeking

Which one is most reactive towards nucleophilic addition reaction?

1.       2.

3.           4.

The radical  is aromatic because it has:

1. 6 p-orbitals and 6 unpaired electrons

2. 7 p-orbitals and 6 unpaired electrons

3. 7 p-orbitals and 7 unpaired electrons

4. 6 p-orbitals and 7 unpaired electrons

Which of the following does not exhibit optical isomerism?

(1) Maleic acid      

(2) α-amino acids

(3) Lactic acid       

(4) Tartaric acid

Which one of the following is most reactive towards electrophilic reagent?