Chemistry Mcqs XII [300 MCQS All Chapters] Online Test 15

XII Chemistry Online Mcqs - All Chapters - Online Mcqs Test - 15

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

Q1. Cyclopentane is an example of

• Aromatic compound
• Aliphatic compound
• Cyclic compound
• None

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Q2. The compound in which two alkyl groups are attached to oxygen atom is called

• Aldehyde
• Ketone
• Ether
• Alcohol

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Q3. Organic compounds contains __________ as an essential element

• Nitrogen
• Carbon
• Oxygen
• Hydrogen

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Q4. In organic compounds carbon atoms form

• Ionic bond
• Metallic bond
• Covalent bond
• None

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Q5. In natural gas the percentage of methane is

• 90%
• 80%
• 95%
• 40%

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Q6. In CCI₄ molecule four valencies of carbon atom are directed towards the corners of a

• Cube
• Hexagon
• Prism
• Tetrahedron

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Q7. Formula of formic acid is

• H-COOH
• CH₃ – COOH
• CH₃ - CH₂ – COOH
• CH₃ - CH₂ CH₂ - COOH

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Q8. What is the formula of Valeric acid is

• H-COOH
• CH₃ (CH₂)₃ – COOH
• CH₃ - CR₂ – COOH
• CH₃ - CH₂ CH₂ COOH

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Q9. Common name of Formic acid is

• Methanoic acid
• Ethanoic acid None
• Propanic acid
• None

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Q10. A series of related chemical compounds that have the same function group and in which two successive members differ in molecular formula by a – CH2 group are called

• Isomers
• Metamers
• Isotopes
• Homologous

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