Chemistry Mcqs XII [300 MCQS All Chapters] Online Test 10

XII Chemistry Online Mcqs - All Chapters - Online Mcqs Test - 10

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

Q1. The formula of oleum is

• H₂S0₄
• H₂SO₃
• H₂S₂O₇
• H₂S₂O₃

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Q2. The king of the chemicals is

• HCI
• H₂SO₄
• HClO₄
• HNO₃

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Q3. H₂SO₄ reacts with Mg metals and liberates

• O₂
• H2
• SO₂
• SO₃

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Q4. Which of the following is charred by conc. H₂SO₄?

• Wood
• Paper
• Sugar
• All

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Q5. H₂S is a good

• Oxidizing agent
• Reducing agent
• Donating agent
• None

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Q6. Which acid is prepared by contact process?

• HCl
• HNO₃
• HF
• H₂SO₄

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Q7. Which acid is used as dehydrating agent?

• HCI
• HNO₃
• H₂SO₄
• CH₃COOH

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Q8. The sulphur trioxide obtained in contact process is used to manufacture sulphuric acid by dissolving in

• Conc. Sulphuric acid
• Diluted sulphuric acid
• Water
• Reacting with steam

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Q9. The catalyst used to convert sulphur dioxide to sulphur trioxide is

• Cu and Fe
• Platinia or V₂O₅
• Platinum or V₂O₅
• Nickel or Iron

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Q10. The element having seven electrons in their valence shell are called

• Inert elements
• Halogens
• Rare earth
• Actinides

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