Punjab 12th Class Chemistry Chapter 10 Alkyl Halides Mcqs Test Online

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Chemistry

1. In primary alkyl halides, the halogen atom is attached to a carbon which is further attached to how many carbon atoms:

1.Three

2.Two

3.One

4.Four

Question 1 of 20

2. The benzene diazonium ones readly decomposes above:

1.5°C

2.10°C

3.40°C

4.20°C

Question 2 of 20

3. For which mechanisms, the first step invalid is the same:

1.E₁ and SN1

2.E₁ and SN2

3.E₂ and SN2

4.E₁ and E₂

Question 3 of 20

4. Action of alkyl halides with NA metal yield:

1.Alkones

2.Alkenes

3.Alcohols

4.Phenols

Question 4 of 20

5. Nucleophilic addition of a primary amine gives:

1.Nitrobenzene

2.Urea

3.Ammonia

4.Imine

Question 5 of 20

6. The rate of E₁ reaction depends upon:

1.The concentration of substrate as well as nucleophile

2.The concentration of substrate

3.The concentration of nucleophile

4.None of these

Question 6 of 20

7. Which is used as anesthetic:

1.Methyl chloride

2.Propanol

3.Ethyl chloride

4.Butyl chloride

Question 7 of 20

8. Grignord’s reagent on treatment with chloramines gives;

1.Urea

2.Primary amine

3.Secondary amine

4.Acetamide

Question 8 of 20

9. Grignord’s reagent gives alkane with:

1.Ethylamine

2.All of these

3.Ethanol

4.Water

Question 9 of 20

10. CD’s are made from:

1.Proponyl chloride

2.Ethyl chloride

3.Acetyl chloride

4.Vinyl chloride

Question 10 of 20

11. Which one of the following is not a nucleophile:

1.H₂O

2.H₂S

3.BF₃

4.NH₃

Question 11 of 20

12. Alkyl halides are considered to be very reactive compounds towards nucleophile because:

1.They have an electrophilic carbon and a good leaving group.

2.They have a nucleophile carbon and a good leaving group.

3.They have an electrophilic carbon and a bad leaving group.

4.They have an electrophilic carbon.

Question 12 of 20

13. Alkyl halides react with excess of ammonia to give:

1.2° – amine

2.All

3.1° – amine

4.3° – amine

Question 13 of 20

14. Erupting volcanoes exit large quantities of:

1.Halogens

2.Both a and c

3.Hydrocarbons

4.Halides

Question 14 of 20

15. Which of the following alkyl halides cannot be formed by direct reaction of alkanes with halogen:

1.R – Br

2.R – I

3.R – F

4.R – Cl

Question 15 of 20

16. SN2 reactions can be best carried out with:

1.All the three

2.Tertiary alkyl halides

3.Primary alkyl halides

4.Secondary alkyl halides

Question 16 of 20

17. Among the alkyl halides the primary alkyl halides always follow the mechanism.

1.SN1

2.SN4

3.SN2

4.SN3

Question 17 of 20

18. Double bond is formed as a result of:

1.Addition reactions

2.Substitution reactions

3.Elimination reactions

4.Rearrangement reactions

Question 18 of 20

19. CH₃CH₂Br on treatment with alc.KOH gives

1.None

2.Propanal

3.Propane

4.Propene

Question 19 of 20

20. Which compound is formed when omines react with vitrous acid:

1.Benzene

2.Thiolene

3.Mesityle

4.Diazonium

Question 20 of 20

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