Chemistry

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

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

[A]Methane 

[B]Propane 

[C]Butane

 [D]Ethane

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? 

[A]Nitrogen 

[B]Hydrogen 

[C]Oxygen 

[D]Helium

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


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

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

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

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

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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