Chemistry Mcqs XII [300 MCQS All Chapters] Online Test 9

XII Chemistry Online Mcqs - All Chapters - Online Mcqs Test - 9

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

Q1. Aluminum resists corrosion due to the formation of a coat of

• AlN
• Al(NO₃)₃
• Al₂O₃
• Al2(CO₃)₃

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Q2. Diamond is used

• For cutting glass
• As precious stone
• For rock drilling
• All

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Q3. The refractive index of diamond is

• 1.4
• 2.45
• 3.4
• 4.4

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Q4. The chemical formula of blue vitriol is

• BaSO₄
• CaSO₄
• CuSO₄
• CuSO₄.5H₂O

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Q5. Lead chromate is used as pigment under the name of

• Chrome yellow
• Blue yellow
• Litharge
• Chrome blue

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Q6. The formula of red led is

• PbO
• Pb₂O₃
• Pb₃O₄
• PbO₂

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Q7. Pb3O₄ is commonly called

• White led
• Litharge
• Sandhur
• None

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Q8. The formula of chrome red is

• PbO
• PbC₂O₄
• Pb₂O₄
• PbCrO₄.PbO

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Q9. Sandhur a brilliant red coloured compound of lead is obtained by treating

• Lead chemically
• Lead with air
• Lead monoxide with air
• Lead oxide with air

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Q10. Lead monoxide is a yellow powder also called

• Litharge
• Epson
• Sandhur
• None

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