Hydrocarbons Practice Questions - DPP for JEE

 Page 1


PART-I (Single Correct MCQs)
1. In the given reaction
 
The X is
(a)
(b) Conc. HCl +Anhy.ZnCl
2
(c) Anh. AlCl
3
(d) KMnO
4
/OH
–
2. Ethyl hydrogen sulphate is obtained by reaction of H
2
SO
4
 on
(a) Ethylene
(b) Ethane
(c) Ethyl chloride
(d) Ethanol
3. Benzene on reaction with ozone forms __________.
(a) 2 molecules of aldehyde and 1 molecule of ketone
Page 2


PART-I (Single Correct MCQs)
1. In the given reaction
 
The X is
(a)
(b) Conc. HCl +Anhy.ZnCl
2
(c) Anh. AlCl
3
(d) KMnO
4
/OH
–
2. Ethyl hydrogen sulphate is obtained by reaction of H
2
SO
4
 on
(a) Ethylene
(b) Ethane
(c) Ethyl chloride
(d) Ethanol
3. Benzene on reaction with ozone forms __________.
(a) 2 molecules of aldehyde and 1 molecule of ketone
(b) 2 molecules of ketone and 1 molecule of aldehyde
(c) triozonide
(d) hexaozonide
4. When neo-pentyl bromide is subjected to Wurtz reaction, the product
formed is
(a) 2,2,4,4-tetramethylhexane
(b) 2,2,4,4-tetramethylpentane
(c) 2,2,5,5-tetramethylhexane
(d) 2,2,3,3-tetramethylhexane
5. The conversion of 2, 3-dibromobutane to 2-butene with Zn and alcohol
is
(a) redox reaction
(b) a-elimination
(c) ß-elimination
(d) Both (a) and (b)
6.     1, 2-Dibromocyclohexane on dehydrobromination gives :
(a)
(b)
(c)
(d) None of these
7. C
6
H
5
CH
3
  Z
In the given sequence Z is:
(a) benzaldehyde
(b) toluic acid
(c) phenyl acetic acid
Page 3


PART-I (Single Correct MCQs)
1. In the given reaction
 
The X is
(a)
(b) Conc. HCl +Anhy.ZnCl
2
(c) Anh. AlCl
3
(d) KMnO
4
/OH
–
2. Ethyl hydrogen sulphate is obtained by reaction of H
2
SO
4
 on
(a) Ethylene
(b) Ethane
(c) Ethyl chloride
(d) Ethanol
3. Benzene on reaction with ozone forms __________.
(a) 2 molecules of aldehyde and 1 molecule of ketone
(b) 2 molecules of ketone and 1 molecule of aldehyde
(c) triozonide
(d) hexaozonide
4. When neo-pentyl bromide is subjected to Wurtz reaction, the product
formed is
(a) 2,2,4,4-tetramethylhexane
(b) 2,2,4,4-tetramethylpentane
(c) 2,2,5,5-tetramethylhexane
(d) 2,2,3,3-tetramethylhexane
5. The conversion of 2, 3-dibromobutane to 2-butene with Zn and alcohol
is
(a) redox reaction
(b) a-elimination
(c) ß-elimination
(d) Both (a) and (b)
6.     1, 2-Dibromocyclohexane on dehydrobromination gives :
(a)
(b)
(c)
(d) None of these
7. C
6
H
5
CH
3
  Z
In the given sequence Z is:
(a) benzaldehyde
(b) toluic acid
(c) phenyl acetic acid
(a)
A : B : 
(b)
A : 
B : H
3
C – C = CH
(c)
A : 
B :  
(d)
(d) benzoic acid
8. Acid catalyzed hydration of alkenes except ethene leads to the
formation of
(a) mixture of secondary and tertiary alcohols
(b) mixture of primary and secondary alcohols
(c) secondary or tertiary alcohol
(d) primary alcohol
9. In reaction sequence
molecule ‘M’ and reagent ‘R’ respectively are
(a) CH
3
CH
2
Cl and NaOH
(b) CH
3
CH
2
OH and H
2
SO
4
(c) CH
2
Cl . CH
2
OH and aqueous NaHCO
3
(d) and heat
10. Predict the correct intermediate and product in the following reaction :
Page 4


PART-I (Single Correct MCQs)
1. In the given reaction
 
The X is
(a)
(b) Conc. HCl +Anhy.ZnCl
2
(c) Anh. AlCl
3
(d) KMnO
4
/OH
–
2. Ethyl hydrogen sulphate is obtained by reaction of H
2
SO
4
 on
(a) Ethylene
(b) Ethane
(c) Ethyl chloride
(d) Ethanol
3. Benzene on reaction with ozone forms __________.
(a) 2 molecules of aldehyde and 1 molecule of ketone
(b) 2 molecules of ketone and 1 molecule of aldehyde
(c) triozonide
(d) hexaozonide
4. When neo-pentyl bromide is subjected to Wurtz reaction, the product
formed is
(a) 2,2,4,4-tetramethylhexane
(b) 2,2,4,4-tetramethylpentane
(c) 2,2,5,5-tetramethylhexane
(d) 2,2,3,3-tetramethylhexane
5. The conversion of 2, 3-dibromobutane to 2-butene with Zn and alcohol
is
(a) redox reaction
(b) a-elimination
(c) ß-elimination
(d) Both (a) and (b)
6.     1, 2-Dibromocyclohexane on dehydrobromination gives :
(a)
(b)
(c)
(d) None of these
7. C
6
H
5
CH
3
  Z
In the given sequence Z is:
(a) benzaldehyde
(b) toluic acid
(c) phenyl acetic acid
(a)
A : B : 
(b)
A : 
B : H
3
C – C = CH
(c)
A : 
B :  
(d)
(d) benzoic acid
8. Acid catalyzed hydration of alkenes except ethene leads to the
formation of
(a) mixture of secondary and tertiary alcohols
(b) mixture of primary and secondary alcohols
(c) secondary or tertiary alcohol
(d) primary alcohol
9. In reaction sequence
molecule ‘M’ and reagent ‘R’ respectively are
(a) CH
3
CH
2
Cl and NaOH
(b) CH
3
CH
2
OH and H
2
SO
4
(c) CH
2
Cl . CH
2
OH and aqueous NaHCO
3
(d) and heat
10. Predict the correct intermediate and product in the following reaction :
A : B : 
11. The treatment of CH
3
MgX with  produces
(a)
(b)
(c)
(d) CH
4
12. Which of the following reagents convert propene to1-propanol?
(a) H
2
O, H
2
SO
4
(b) Aqueous KOH
(c) MgSO
4
, NaBH
4
/H
2
O
(d) B
2
H
6
, H
2
O
2
, OH
–
13. A group which deactivates the benzene ring towards electrophilic
substitution but which directs the incoming group principally to the o-
and p-positions is
(a) –NH
2
(b) –Cl
(c) –NO
2
(d) –C
2
H
5
14. The main product of the reaction is :
 
(a)
(b)
Page 5


PART-I (Single Correct MCQs)
1. In the given reaction
 
The X is
(a)
(b) Conc. HCl +Anhy.ZnCl
2
(c) Anh. AlCl
3
(d) KMnO
4
/OH
–
2. Ethyl hydrogen sulphate is obtained by reaction of H
2
SO
4
 on
(a) Ethylene
(b) Ethane
(c) Ethyl chloride
(d) Ethanol
3. Benzene on reaction with ozone forms __________.
(a) 2 molecules of aldehyde and 1 molecule of ketone
(b) 2 molecules of ketone and 1 molecule of aldehyde
(c) triozonide
(d) hexaozonide
4. When neo-pentyl bromide is subjected to Wurtz reaction, the product
formed is
(a) 2,2,4,4-tetramethylhexane
(b) 2,2,4,4-tetramethylpentane
(c) 2,2,5,5-tetramethylhexane
(d) 2,2,3,3-tetramethylhexane
5. The conversion of 2, 3-dibromobutane to 2-butene with Zn and alcohol
is
(a) redox reaction
(b) a-elimination
(c) ß-elimination
(d) Both (a) and (b)
6.     1, 2-Dibromocyclohexane on dehydrobromination gives :
(a)
(b)
(c)
(d) None of these
7. C
6
H
5
CH
3
  Z
In the given sequence Z is:
(a) benzaldehyde
(b) toluic acid
(c) phenyl acetic acid
(a)
A : B : 
(b)
A : 
B : H
3
C – C = CH
(c)
A : 
B :  
(d)
(d) benzoic acid
8. Acid catalyzed hydration of alkenes except ethene leads to the
formation of
(a) mixture of secondary and tertiary alcohols
(b) mixture of primary and secondary alcohols
(c) secondary or tertiary alcohol
(d) primary alcohol
9. In reaction sequence
molecule ‘M’ and reagent ‘R’ respectively are
(a) CH
3
CH
2
Cl and NaOH
(b) CH
3
CH
2
OH and H
2
SO
4
(c) CH
2
Cl . CH
2
OH and aqueous NaHCO
3
(d) and heat
10. Predict the correct intermediate and product in the following reaction :
A : B : 
11. The treatment of CH
3
MgX with  produces
(a)
(b)
(c)
(d) CH
4
12. Which of the following reagents convert propene to1-propanol?
(a) H
2
O, H
2
SO
4
(b) Aqueous KOH
(c) MgSO
4
, NaBH
4
/H
2
O
(d) B
2
H
6
, H
2
O
2
, OH
–
13. A group which deactivates the benzene ring towards electrophilic
substitution but which directs the incoming group principally to the o-
and p-positions is
(a) –NH
2
(b) –Cl
(c) –NO
2
(d) –C
2
H
5
14. The main product of the reaction is :
 
(a)
(b)
(c)
(d)
15. In the following reaction, the major product is
(a)
(b)
(c)
(d)
16. Which of these will not react with acetylene?
(a) NaOH
(b) ammonical AgNO
3
(c) Na
(d) HCl