Chemistry (General Science): All SSC Exams Previous Years Questions Papers Solved Part 13

Q.1:- Sea water is saltier than rain water because ?

1. Sea animals are salt producing
2. The air around the sea is salty
3. Rivers wash away salts from earth and pour them into the sea
4. Sea beds have salt producing mines

Q.2:- Which is the highest quality of hard coal ?

1. Anthracite
2. Bituminous
3. Lignite
4. Peat

Q.3:- What is the common name for the substance which irritates lachrymal glands ?

1. Tear Gas
2. Laughing Gas
3. Anaesthetic Gas
4. Noble Gas

Q.4:- Atomic number of an atom gives the number of which of the following ?

1. Electrons
2. Protons
3. Neutrons
4. Neutrons and Protons

Q.5:- The last preferred technique in the disposal of Municipal Solid Waste is ?

1. Incineration
2. Composting
3. Land Filling
4. Bricketting

Q.6:- Sour taste of lemon is due to the presence of which of the following ?

1. Citric Acid
2. Acetic Acid
3. Oxalic Acid
4. Formic Acid

Q.7:- The constituents of automobile exhaust that can cause cancer is / are ?

1. Oxides of Nitrogen
2. Carbon Monoxide
3. Polycyclic Hydrocarbons
4. Lead

Q.8:- The most commonly used chemicals in the artificial rainmaking or cloud seeding are ?

1. Silver Iodide (Ag I)
2. Sodium Chloride (NaCl)
3. Dry Ice (Frozen CO₂)
4. All of the above

Q.9:- Which one of the following metals does not react with water to produce Hydrogen ?

1. Potassium
2. Cadmium
3. Sodium
4. Lithium

Q.10:- An atomic clock is based on transition in ?

1. Sodium
2. Caesium
3. Magnesium
4. Aluminium

Q.11:- Sea water can be purified by the process of ?

1. Distillation
2. Evaporation
3. Filtration
4. Fractional Distillation

Q.12:- The gas used in the artificial ripening of fruits is ?

1. Acetylene
2. Methane
3. Ethane
4. Butane

Q.13:- Which metal is extracted from sea water ?

1. Potassium
2. Magnesium
3. Aluminium
4. Beryllium

Q.14:- The gas which turns into liquid at the lowest temperature among the following is ?

1. Hydrogen
2. Oxygen
3. Helium
4. Nitrogen

Q.15:- The amount of Chlorine available in water after disinfection is called as ?

1. Free Chlorine
2. Residual Chlorine
3. Free Available Chlorine
4. Combined Available Chlorine

Q.16:- Detergents clean surfaces on the principle of ?

1. Viscosity
2. Surface Tension
3. Elasticity
4. Floatation

Q.17:- Which gas does not form the part of atmosphere ?

1. Nitrogen
2. Helium
3. Chlorine
4. None of the above

Q.18:- Nuclear energy is a mineral based energy source. It is derived from ?

1. Uranium
2. Thorium
3. Plutonium
4. All of the above

Q.19:- Litmus is obtained from ?

1. A bacterium
2. A fungus
3. An algae
4. Lichen

Q.20:- Denatured spirit is Ethanol mixed with ?

1. Petrol
2. Kerosene
3. Water
4. Pyridine

Q.21:- An emulsion is a colloid of a ?

1. Gas in a liquid
2. Liquid in a liquid
3. Liquid in a gas
4. Gas in a solid

Q.22:- The most abundant inert gas in the atmosphere is ?

1. Helium
2. Neon
3. Argon
4. Krypton

Q.23:- Which of the following gases is most toxic ?

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

Q.24:- Alum stops bleeding in minor cuts because of ?

1. Solvation
2. Emulsion
3. Dialysis
4. Coagulation

Q.25:- For determination of the age of which among the following is carbon dating method used ?

1. Fossils
2. Rocks
3. Trees
4. 1 & 2 Above