Set-11 General Science (English) Railway NTPC and Railway Group D 2019 Previous Year Questions | Study Virus

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We are providing the most important General Science Previous year Questions for RRB NTPC 2019, RRB Group D 2019, SSC 2019 and all other competitive exams. These questions have very high chances to be asked in RRB NTPC 2019, RRB Group D 2019.

Set-11 General Science Previous Year Questions

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1.Greenhouse effect is caused by –
1. Nitrogen
2. Carbon dioxide
3. Carbon monoxide
4. Nitrogen dioxide

Ans:2

2.Which acid is present in lemon?
1. Formic acid
2. Citric acid
3. Lactic acid
4. Tartaric acid

Ans:2

3.Tear gas used by the police to disperse the mob contains –
1. Carbon dioxide
2. Chlorine
3. Ammonia
4. Hydrogen Sulphide

Ans:2

4.Formation of ozone hole is maximum over –
1. Africa
2. India
3. Antarctica
4. Europe

Ans:3

5.The tip of the match-stick contains –
1. Phosphorus pentoxide
2. White phosphorus
3. Red phosphorus
4. Phosphorus trichloride

Ans:3

6.Zinc phosphide is commonly used as –
1. Fungicide
2. Herbicide
3. Rodenticide
4. Deodorant

Ans:3

7.Aspirin is common name of –
1. Salicylic acid
2. Salicylate
3. Methyl salicylate
4. Acetyl salicylic acid

Ans:4

8.The poisonous gas accidentally released in Bhopal Gas Tragedy is –
1. Methane
2. Nitrous Oxide
3. Methyl Isocyanate
4. Cyanogen

Ans:3

9.Release of which among the following is the primary reason for depletion of the ozone layer?
1. Nitrous oxide
2. Hydrogen dioxide
3. Chlorofluro carbon
4. Carbon monoxide

Ans:3

10.The common name of sodium tetraborate decahydrate is _____.
1. Epsom salt
2. Gypsum
3. Borax
4. Galena

Ans:3

11.Who invented Antibiotics?
1. Joseph Lister
2. William Harvey
3. Robert Knock
4. Alexander Fleming

Ans:4

12.___________ Gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.
1. Hydrogen
2. Nitrogen
3. Carbon dioxide
4. Ozone

Ans:3

13.Metals react with sodium hydroxide to produce ___________.
1. Oxygen gas
2. Sodium
3. Water
4. Hydrogen gas

Ans:4

14.Which base is present in lime water?
1. Sodium hydroxide
2. Magnesium hydroxide
3. Calcium hydroxide
4. Ammonium hydroxide

Ans:3

15.Brownish film formed on iron when left in open is called?
1. Dust
2. Shovel
3. Spade
4. Rust

Ans:4

16.The substances which have very low ignition temperature and can easily catch fire with a flame are called _____________ substances.
1. Hazardous
2. Perilous
3. Incombustible
4. Inflammable

Ans:4

17.Which of the toxic heavy metals is found in modern tannery industries?
1. Nickel
2. Zinc
3. Chromium
4. Lead

Ans:3

18.The main source of carbon monoxide is –
1. Industrial process
2. Agricultural activities
3. Combustion of fossil fuels
4. Solid waste disposal

Ans:3

19.Which of the following is used to decolourise Brown Sugar Solution is –
1. Coal
2. Hydrochloric Acid
3. Charcoal
4. None of these

Ans:3

20.The chemical formula of baking soda is:
1. Ca(OH)2
2. NaHCO3
3. CaCO3
4. Na2CO3

Ans:2