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-28 General Science Previous Year Questions
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1.__________ is a polar covalent bond.
1. P-Cl
2. Ne-Ne
3. Cl-Cl
4. Ca-Cl
Ans:1
2.NaCl has ______.
1. Nonpolar bonds
2. Polar covalent bonds
3. Metallic bonds
4. Ionic bonds
Ans:4
3.Hemoglobin has the highest affinity with which of the following?
1. SO2
2. CO2
3. CO
4. NO2
Ans:3
4.Vitamin A is also known as _____.
1. Thiamine
2. Riboflavin
3. Retinol
4. Calciferol
Ans:3
5.Which drug is used as an Anti-Inflammatory?
1. Metformin
2. Diazepam
3. Latanoprost
4. Prednisone
Ans:4
6.Adding which substance gives blue colour to glass?
1. Manganese oxide
2. Cobalt oxide
3. Chromium oxide
4. Iron oxide
Ans:2
7.Which of the following elements has the lowest melting point?
1. Sodium
2. Tin
3. Radon
4. Radium
Ans:3
8.Atomic number of which of the following elements is greater than that of Fluorine?
1. Sodium
2. Beryllium
3. Nitrogen
4. Boron
Ans:1
9.Which of the following induces souring of milk?
1. Acetic Acid
2. Citric Acid
3. Ascorbic Acid
4. Lactic Acid
Ans:4
10.What is the net charge on Calcium fluoride?
1. 1+
2. 0
3. 1–
4. 2–
Ans:2
11.Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?
1. B2H6
2. NF3
3. CCl3F
4. C6H6
Ans:3
12.For what is Mohs scale used?
1. To measure brightness of a substance
2. To measure viscosity of a liquid
3. To measure elasticity of a material
4. To measure hardness of minerals
Ans:4
13.Alkali metals can –
1. Be highly unstable at room temperature
2. Vaporize at room temperature
3. Easily gain electrons
4. Easily lose electrons
Ans:4
14.Why does Carbon Tetrachloride have no dipole moment?
1. Because of same size of carbon and chlorine atoms
2. Because of regular tetrahedral structure
3. Because of planar structure
4. Because of similar electron affinities of carbon and chlorine
Ans:2
15.Which drug is used as an Antidepressant?
1. Oxybutynin
2. Tramadol
3. Sumatriptan
4. Bupropion
Ans:4
16.Which of the following gases is heavier than oxygen?
1. Carbon dioxide
2. Ammonia
3. Methane
4. Helium
Ans:1
17.Which acid is released when an Ant bites?
1. Hydrochloric Acid
2. Formic Acid
3. Acetic Acid
4. Phosphoric Acid
Ans:2
18.Which of the following is not a donor atom?
1. Phosphorus
2. Antimony
3. Arsenic
4. Aluminium
Ans:4
19.0 K is equivalent to –
1. 273°C
2. – 273°C
3. 0°C
4. 100°C
Ans:2
20.___________ gives hardness to stainless steel.
1. Zinc
2. Lead
3. Carbon
4. Tin
Ans:3