Chemistry Mcqs XII [300 MCQS All Chapters] Online Test 21

XII Chemistry Online Mcqs - All Chapters - Online Mcqs Test - 21

Chemistry Online Mcqs Test for class 12, Second Year, According to Karachi Board 300 Online Multiple Choice Questions

Q1. The general formula of alkyl halides is

• R-X
• R-NH2
• R-CHO
• None

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Q2. Alkyl halides on treatment with KOH give

• Phenol
• Alkene
• Aldehyde
• Ketone

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Q3. The Markowinkoff Rule is used for

• Stereochemistry
• Stability of free radicals
• Activity of enzyme
• Addition of acid to double bonds

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Q4. The free radicals are species of organic ions that have

• Positive charge
• Odd election
• Negative charge
• No charge

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Q5. Alkyl halides can be prepared by treating halogen acids with

• Ethene
• Ethanol
• Ethene and Ethanol
• Aldehyde

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Q6. The reaction of alcohol with SOCI₂ in the presence of pyridine as catalyst gives

• Acids
• Acid chloride
• Alkyl halide
• Benzene

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Q7. AIkyl halides on treatment with Grignard’s reagent give

• Alkenes
• Alkynes
• Akanes
• Acids

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Q8. AIkyl magnesium halides are known as

• Simon Smith reagent
• Tollen’s reagent
• Grignard’s reagent
• Bardord’s reagent

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Q9. Hydrolysis of Grignard’s reagent yields

• Alcohol
• Aldehyde
• Ester
• Alkane

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Q10. Grignard’s reagent on treatment with dry Co₂ and HCI yields

• Ester
• Alcohol
• Carboxilic acid
• Aldehyde

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