Dear Aspirants,
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-24 General Science Previous Year Questions
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1.Ozone hole is caused by chemicals like _____.
1. Nitrogen Oxide
2. Hydrogen Sulphide
3. Chloro Fluoro Carbon
4. Carbon Monoxide
Ans:3
2.Who invented Neon Lamp?
1. Vint Cerf
2. David Chaum
3. Georges Claude
4. Josephine Cochrane
Ans:3
3.Which of the following is the main end product of carbohydrate digestion?
1. Fats
2. Lipids
3. Glucose
4. Cellulose
Ans:3
4.Which of the following elements has the lowest melting point?
1. Titanium
2. Tungsten
3. Argon
4. Nickel
Ans:3
5.Soil having high content of aluminum and iron oxide is also known as _____.
1. Meadow soil
2. Pedalfer soil
3. Chernozen soil
4. Podzol soil
Ans:2
6.Which of the following is an Inert Gas?
1. Hydrogen
2. Nitrogen
3. Oxygen
4. Argon
Ans:4
7.Ozone is an ______ of oxygen.
1. Allotrope
2. Isotope
3. Isobar
4. Isotone
Ans:1
8. Which among the following is an example of solid sol?
1. Milk of magnesia
2. Foam
3. Coloured gemstones
4. Rubber
Ans:3
9. Process of loosing electrons is known as _____.
1. oxidation
2. reduction
3. radiation
4. both oxidation and reduction
Ans:1
10. Anions are formed by _____.
1. losing of electrons
2. gaining of electrons
3. gaining of neutrons
4. losing of neutrons
Ans:2
11. What is the common characteristic of the elements of the same group in the periodic table?
1. Electrons in outer most shell
2. Total number of electrons
3. Total number of protons
4. Atomic weight
Ans:1
12. Which disease is caused by Nickel?
1. Itai Itai
2. Dermatitis
3. Learning disability
4. Asthma
Ans:2
13. Most liquids that conduct electricity are solutions of acids, bases and ______.
1. Copper
2. Aluminium
3. Salts
4. Iron
Ans:3
14. Activated Charcoal is used to remove colouring matter from pure substances by_______.
1. Bleaching
2. Oxidation
3. Adsorption
4. Reduction
Ans:3
15. Chernobyl disaster is the result of pollution by_____________.
1. Oil spill
2. Acid rain
3. Carbon dioxide
4. Radioactive waste
Ans:4
16. Who had indirect role in the discovery of the atom bomb?
1. Madam Curie
2. Pierre Curie
3. Otto Hahn
4. Albert Einstein
Ans:4
17. A substance which readily forms colloidal solution in contact with water is called –
1. Extrinsic colloid
2. Associated colloid
3. Hydrophobic colloid
4. Hydrophilic colloid
Ans:4
18. Actinides are the elements with atomic numbers from
1. 89 to 103
2. 101 to 115
3. 97 to 104
4. 36 from 43
Ans:1
19. Isotones is that nuclei of atomic nucleus in which-
1. Number of neutrons is same but number of protons is different
2. Number of protons is same but number of neutrons is different
3. Number of both protons and neutrons is same
4. Number of both protons and neutrons is different
Ans:1
20.The conversion of hard water into soft water by boiling or adding calcium hydroxide is called _______.
1. Baker’s process
2. Temp’s process
3. Clarke’s process
4. Lake’s process
Ans:3