Chemistry TOP 30 MCQs for all exams questions and answers

Chemistry TOP 30 MCQs for all competitive exams questions and answers for SSC, RRB NTPC, NDA, FCI, PSUs, state government exams, UPPPSC, NABARD, IBPS, Insurance etc

1. The first metal used by a man was

a) Copper

b) Silver

c) Bronze

d) Brass

 

2. Which of the following is used to remove rust stains on cloth?

a) Kerosene

b) Lime

c) Oxalic acid solution 

d) Petrol

 

3. Curd is sour due to presence of

a) Tartaric acid

b) Lactic acid

c) Acetic acid

d) Oxalic acid

 

4. Tear gas is :

a) Chloroprene

b) Carbonyl chloride

c) Nitrous oxide

d) Bleaching powder

 

 5. Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ?

a) Borax

b) Saltpetre

c) Hydrogen peroxide

d) Sodium chloride

 

6. Which one of the following is used to restore the colour of old oil paintings ?

a) Ozone

b) Hydrogen peroxide

c) Barium peroxide

d) Sodium peroxide

 

7. A polymeric substance used to make parachute is

a) Rayon

b) Viscose

c) Cotton

d) Terylene

 

8. Drinking soda is

a) Alkaline

b) Acidic

c) Neutral

d) Oxidant

 

9. The cathode of a lead storage battery is made up of

a) Zinc

b) Lead

c) Lead oxide

d) Manganese dioxide

 

10. Which one of the following is radioactive ?

a) Cesium

b) Platinum

c) Strontium

d) Thorium

 

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