GS. QUIZ ON CHEMISTRY

1.    The hottest part of the gas flame is known as the:

(1) Luminous zone                        (2) Dark zone

(3) Blue Zone                                (4) Non-luminous Zone

2.    Combustion is a:

(1) Endothermic reaction

(2) Exothermic reaction

(3) Both of the above

(4) None of the above

3.    Which gas is produced when calcium carbonate is heated with dilute hydrochloric acid?

(1) Carbon monoxide                    (2) Carbon dioxide

(3) Carbon disulphide                    (4) Carbon tetrachloride

4.    Liquid carbon dioxide is used in___

(1) Fire – extinguisher                   (2) Food preservation

(3) Cloud seeding                          (4) All the above

5.    Which of the following is used in medicine as antacids?

(1) Calcium carbonate

(2) Sodium carbonate

(3) Sodium bicarbonate

(4) Magnesium carbonate

6.    Refractive index of diamond is:

(1) 1.5                                            (2) 2.4

(3) 3.01                                          (4) 4.5

7.    Which of the following gases is supplied in LPG (Liquefied Petroleum Gases) cylinders for domestic use?

(1) Methane and Propane

(2) Methane and Ethane

(3) Ethane and Butane

(4) Propane and Butane

8.    55000 kilo joule/kg heat value is present in___

(1) Methane                                  (2) Ethane

(3) Propane                                   (4) Butane

9.    If 20ml of petroleum is heated upto 250⁰C and gases are formed were allowed to pass through a column to cool down upto 130⁰C. The liquid collected should mainly be a mixture of:

(1) Petrol and fuel oil

(2) Petrol and ethanol

(3) Kerosene and fuel oil

(4) Kerosene and naphtha

10.  In the  laboratory, methane is prepared by heating a mixture of:

(1) Sodium acetate and sodium carbonate

(2) Sodium acetate and soda line

(3) Soda line and sodium hydroxide

(4) Soda line and calcium oxide

Answers:

1	4
2	2
3	2
4	1
5	3
6	2
7	4
8	1
9	3
10	2