Chemistry (General Science): All SSC Exams Previous Years Questions Papers Solved Part 2

Q.1:- Threshold limit value of copper in the atmospheric air is ?

1. 001 mg/m³
2. 01 mg/ m³
3. 0 mg/m³
4. 0 mg/ m³

Q.2:- Heating of a ore below its melting point in the absence of air is known as ?

1. Refining
2. Calcination
3. Roasting
4. Smelting

Q.3:- Neutrons are slowed down in a nuclear reactor by ?

1. Fissionable Material
2. Moderator
3. Control Rods
4. Cooling System

Q.4:- Rutherford’s scattering experiment provide the presence of ?

1. Atoms in all mater
2. Electrons in atoms
3. Neutrons in atoms
4. Nucleus in atoms

Q.5:- The percentage of Nitrogen present in Ammonium Sulphate is ?

1. 27%
2. 25%
3. 5%
4. 18%

Q.6:- The inert gas used as beacon light is ?

1. Kr
2. Ar
3. He
4. Ne

Q.7:- Number of neutrons in an atom of Hydrogen is ?

1. One
2. Zero
3. Two
4. Three

Q.8:- The gas produced in marshy places due to decomposition of vegetation of ?

1. Carbon Monoxide
2. Carbon Dioxide
3. Sulphur Dioxide
4. Methane

Q.9:- The chemical name of Baking Soda is ?

1. Sodium Carbonate
2. Sodium Bicarbonate
3. Sodium Chloride
4. Sodium Nitrate

Q.10:- Which of the following is not a Nitrogenous Fertiliser ?

1. Ammonium Sulphate
2. Urea
3. Ammonium Nitrate
4. Superphosphate

Q.11:- Warming Ammonium chloride with Sodium Hydrochloride in a test tube is an example of ?

1. Open System
2. Closed System
3. Isobaric System
4. Isothermal System

Q.12:- Which of the following is a radioactive element ?

1. Cobalt
2. Uranium
3. Argon
4. Chromium

Q.13:- Which of the following is not a donor atom ?

1. Phosphorus
2. Antimony
3. Arsenic
4. Aluminium

Q.14:- Bauxite is used as raw material by which industry ?

1. Aluminium
2. Iron
3. Steel
4. Gold

Q.15:- An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a ?

1. Power Transmitter
2. Battery
3. Uninterrupted Power Supply (UPS)
4. Generator

Q.16:- The number of hydrogen bonds between guanine and cytosine in DNA is ?

1. 2
2. 3
3. 4
4. 1

Q.17:- Which method will be employed to test the hardness of water ?

1. Boiling
2. Distillation
3. Formation of lather with soap
4. None of these

Q.18:- The gas dissolved in water that makes it basic is ?

1. Ammonia
2. Sulphur Dioxide
3. Hydrogen
4. Carbon Dioxide

Q.19:- The acid which fails to liberate Carbon Dioxide from Sodium Bicarbonate is ?

1. Acetic Acid
2. Formic Acid
3. Carbonic Acid
4. Sulphuric Acid

Q.20:- Nitrogen in water is commonly found in the form of ?

1. Nitrous Oxide
2. Nitrate
3. Nitric Oxide
4. Nitrite

Q.21:- A solution is ?

1. A homogeneous mixture of two or more substances
2. A solid dissolved in a liquid
3. A solid dissolved in water
4. A mixture of two liquids

Q.22:- Carbon Footprint can be reduced by ?

1. Recycling Waste Materials
2. Using Energy Efficient Appliances
3. Commuting by public transport
4. All of these

Q.23:- Most commonly used bleaching agent is ?

1. Sodium Chloride
2. Alcohol
3. Carbon Dioxide
4. Chlorine

Q.24:- Which of the following elements is obtained from sea weeds ?

1. Iodine
2. Vanadium
3. Argon
4. Sulphur

Q.25:- Which of the following elements does not exhibit natural radioactivity ?

1. Uranium
2. Thorium
3. Aluminium
4. Polonium