Punjab 12th Class Chemistry Chapter 10 Alkyl Halides Mcqs Test Online Punjab 12th Class Chemistry Chapter 10 Alkyl Halides Mcqs Test Online Chemistry 1. For which mechanisms, the first step invalid is the same: 1.E₁ and SN2 2.E₁ and SN13.E₂ and SN2 4.E₁ and E₂ Question 1 of 20 2. Which compound is formed when omines react with vitrous acid: 1.Benzene 2.Mesityle 3.Thiolene 4.Diazonium Question 2 of 20 3. The benzene diazonium ones readly decomposes above: 1.20°C 2.10°C 3.5°C 4.40°C Question 3 of 20 4. Nucleophilic addition of a primary amine gives: 1.Imine 2.Urea 3.Nitrobenzene 4.Ammonia Question 4 of 20 5. Which one of the following is not a nucleophile: 1.BF₃ 2.H₂S 3.H₂O 4.NH₃Question 5 of 20 6. Which is used as anesthetic: 1.Ethyl chloride 2.Methyl chloride 3.Butyl chloride 4.Propanol Question 6 of 20 7. SN2 reactions can be best carried out with: 1.Primary alkyl halides 2.Tertiary alkyl halides 3.Secondary alkyl halides 4.All the three Question 7 of 20 8. CH₃CH₂Br on treatment with alc.KOH gives 1.Propanal 2.None 3.Propane 4.Propene Question 8 of 20 9. Grignord’s reagent gives alkane with: 1.Water 2.Ethanol 3.Ethylamine 4.All of these Question 9 of 20 10. 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 10 of 20 11. Action of alkyl halides with NA metal yield: 1.Alcohols 2.Phenols 3.Alkenes 4.Alkones Question 11 of 20 12. The rate of E₁ reaction depends upon: 1.None of these 2.The concentration of substrate as well as nucleophile 3.The concentration of substrate 4.The concentration of nucleophile Question 12 of 20 13. Double bond is formed as a result of: 1.Rearrangement reactions2.Elimination reactions 3.Substitution reactions 4.Addition reactions Question 13 of 20 14. Which of the following alkyl halides cannot be formed by direct reaction of alkanes with halogen: 1.R – Cl 2.R – F 3.R – I 4.R – Br Question 14 of 20 15. In primary alkyl halides, the halogen atom is attached to a carbon which is further attached to how many carbon atoms: 1.Two 2.Four3.Three 4.One Question 15 of 20 16. Erupting volcanoes exit large quantities of: 1.Hydrocarbons 2.Halogens 3.Halides 4.Both a and cQuestion 16 of 20 17. Alkyl halides react with excess of ammonia to give: 1.All 2.2° – amine 3.3° – amine 4.1° – amine Question 17 of 20 18. CD’s are made from: 1.Ethyl chloride 2.Proponyl chloride 3.Vinyl chloride 4.Acetyl chlorideQuestion 18 of 20 19. Grignord’s reagent on treatment with chloramines gives; 1.Primary amine 2.Urea3.Secondary amine 4.Acetamide Question 19 of 20 20. Among the alkyl halides the primary alkyl halides always follow the mechanism. 1.SN4 2.SN3 3.SN2 4.SN1 Question 20 of 20 Loading... Test By Subject Punjab Test By Topics 12th Class Chemistry You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.