Chemistry Mcqs XII [300 MCQS All Chapters] Online Test 6

XII Chemistry Online Mcqs - All Chapters - Online Mcqs Test - 6

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

Q1. The chemical formula of Magnesite is

• MgCI₂
• Mg(HCO₃)₂
• MgCO₃
• None

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Q2. The electrolytic cell used for the production of metallic sodium is known as

• Down’s cell
• Solvay’s cell
• Habeas cell
• None

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Q3. Sodium metal is obtained from which of the following mineral

• Lepidolite
• Amblygonite
• Camalite
• Halite

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Q4. The formula of Chile salt petre is

• KNO₃
• NaNO₃
• NaCl
• Na₂CO₃

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Q5. When NaCI is dissolved in water, the sodium ions become

• Oxidized
• Reduced
• Hydrolyzed
• Hydrated

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Q6. The mineral MgCo₃. CaCo₃ is known as

• Gypsum
• Beryl
• Dolomite
• Calcite

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Q7. Epson salt is a hydrate of

• Magnesium sulphate
• Calcium sulphate
• Ferrous ammonium sulphate
• Magnesium ammonium phosphate

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Q8. NaHCO₃ is commonly called

• Soda ash
• Baking soda
• Washing soda
• None

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Q9. Sodium carbonate is generally called

• Washing soda or soda ash
• Backing soda
• Caustic soda
• None

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Q10. NaHCO₃ is prepared by

• Down’s process
• Solvay’s process
• Nelson’s process
• None

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