Chemistry Mcqs XII [300 MCQS All Chapters] Online Test 16

XII Chemistry Online Mcqs - All Chapters - Online Mcqs Test - 16

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

Q1. The general formula of alkane is

• CH_n+H_2n+2
• C_nH_n
• C_nH_2n
• C_nH_{2n +2}

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Q2. The general formula of alkenes is

• C_nH_2n+2
• C_nH_n
• C_nH_2n
• C_nH_2n+1

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Q3. Which has the longest bond length?

• C = C
• C = C
• C – C
• All

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Q4. The class of straight chain hydrocarbons is called

• Acyclic
• Cyclic
• Primary
• Aromatic

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Q5. Compounds having same molecular formula but different structures are said to be

• Monomers
• Isomers
• Metamers
• Tautomers

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Q6. Compounds having same molecular formula but different functional groups show

• Metamorphism
• Position isomerism
• Chain isomerism
• Functional group isomerism

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Q7. The phenomenon in which two or more compounds have the same molecular formula but different carbon chain is known as

• Metamorphism
• Functional group isomerism
• Position isomerism
• Chain isomerism

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Q8. The phenomenon in which the compounds have the same functional group hut different alkyl groups attached to the same multivalent atom is known as

• Metamorphism
• Functional group isomerism
• Position isomerism
• None

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Q9. An isomer of ethanol is

• Di methyl ether
• Diethyl ether
• Ethylene glycol
• Methanol

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Q10. On strong heating the fractions containing the larger hydrocarbon molecules are broken up into smaller and more volatile molecules, this is called

• Sublimation
• Cracking
• Roasting
• Refining

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