Which one of the following has the shortest carbon-carbon bond length?                      

1. Benzene                     

2. Ethene

3. Ethyne                         

4. Ethane

Which one of the following compounds is most acidic?                                   

1. 

2. 

3. 

4. 

Which of the following represents the correct order of acidity in the given compounds?

1. F${\mathrm{CH}}_2$COOH > ${\mathrm{CH}}_3$COOH > Br${\mathrm{CH}}_2$COOH > Cl${\mathrm{CH}}_2$COOH

2. Br${\mathrm{CH}}_2$COOH > Cl${\mathrm{CH}}_2$COOH > F${\mathrm{CH}}_2$COOH > ${\mathrm{CH}}_3$COOH

3. F${\mathrm{CH}}_2$COOH > Cl${\mathrm{CH}}_2$COOH > Br${\mathrm{CH}}_2$COOH > ${\mathrm{CH}}_3$COOH

4. ${\mathrm{CH}}_3$COOH > Br${\mathrm{CH}}_2$COOH > Cl${\mathrm{CH}}_2$COOH > F${\mathrm{CH}}_2$COOH 

Among the following, the strongest acid is:

The distance between two adjacent carbon atoms is largest in

1. Benzene             

2. Ethene

3. Butane              

4. Ethyne

Increasing order of acidic strength among p-methoxyphenol (I), p-methylphenol (II) and p-nitrophenol (III) is-

1. III, I, II           

2. II, I, III             

3. III, II, I             

4. I, II, III

Which of the following represent the correct decreasing order of acidic strength of following? 

(i) Methanoic acid

(ii) Ethanoic acid

(iii) Propanoic acid

(iv) Butanoic acid

1. (i)>(ii)>(iii)>(iv)

2. (ii)>(iii)>(iv)>(i)

3. (i)>(iv)>(iii)>(ii)

4. (iv)>(i)>(iii)>(ii)

The IUPAC name of the compound,

 is-

1. 1, 3-Dibromo-3-methylbutane

2. 3-Methyl-1,2-bromobutane

3. 3-Methyl-1,3-bromopropane

4. None of the above

Which of the following is more basic than aniline?                    

1. Diphenylamine

2. Triphenylamine

3. p-nitroaniline

4. Benzylamine

The shortest C-C bond distance is found in               

1. Diamond             

2. Ethane

3. Benzene             

4. Acetylene