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

Zeolite method

2. Which among the following is the main constituent of Biogas?

Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.

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


4. Which among the following is a Noble Gas?


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

Chlorofluoro carbon

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

Sodium thiosulphate

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


8. Which among the following element is an essential constituent of acids?


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

Nitrous oxide and sulphur dioxide

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

John Dalton

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