Basic Chemistry Questions & Answers

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1. Which among the following methods can be used to remove the permanent hardness in water due to calcium or magnesium sulphates?
[A]Sulphonate method
[B]Nitrate method
[C]Zeolite method
[D]None of these

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2. Which among the following is the main constituent of Biogas?
[A]Methane
[B]Propane
[C]Butane
[D]Ethane

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3. Which of the following is an anti-knocking compound, that has been phased out in many countries so far?
[A]Lead tetrachloride
[B]Lead tetrachloride
[C]Tetra Ethyl Lead
[D]Ethyl acetate

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4. Which among the following is a Noble Gas?
[A]Nitrogen
[B]Hydrogen
[C]Oxygen
[D]Helium

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5. Which among the following is responsible for depletion of Ozone?
[A]Carbon monoxide
[B]Carbon dioxide
[C]Chlorofluoro carbon
[D]Mercuric oxide

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6. Which among the following is popularly called Hypo?
[A]Silver bromide
[B]Silver nitrate
[C]Sodium thiosulphate
[D]Sodium phosphate

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7. Highest percentage of nitrogen is found in which among the following fertilizers among the given options?
[A]Calcium ammonium nitrate
[B]Ammonium nitrate
[C]Calcium nitrate
[D]Urea

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8. Which among the following element is an essential constituent of acids?
[A]Nitrogen
[B]Hydrogen
[C]Oxygen
[D]Helium

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9. Which among the following oxides cause the Acid rain ?
[A]Carbon monoxide and carbon dioxide
[B]Nitrous oxide and sulphur dioxide
[C]Carbon dioxide and nitrous oxide
[D]Sulphur dioxide and carbon monoxide

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10. Who among the following had given the Atomic Theory?
[A]Benzamin Franklin
[B]Madam Curie
[C]Albert Einstein
[D]John Dalton

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