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

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

The distance between two adjacent carbon atoms is largest in

1. Benzene             

2. Ethene

3. Butane              

4. Ethyne

Among the following the strongest acid is                                 

1. CH₃COOH

2. CH₂ClCH₂COOH

3. CH₂ClCOOH

4. CH₃CH₂COOH

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 

Which one of the following compounds is most acidic?                                   

1. 

2. 

3. 

4. 

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

1. Benzene                     

2. Ethene

3. Ethyne                         

4. Ethane

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