Q.1:- Sea water is saltier than rain water because ?
- Sea animals are salt producing
- The air around the sea is salty
- Rivers wash away salts from earth and pour them into the sea
- Sea beds have salt producing mines
Q.2:- Which is the highest quality of hard coal ?
- Anthracite
- Bituminous
- Lignite
- Peat
Q.3:- What is the common name for the substance which irritates lachrymal glands ?
- Tear Gas
- Laughing Gas
- Anaesthetic Gas
- Noble Gas
Q.4:- Atomic number of an atom gives the number of which of the following ?
- Electrons
- Protons
- Neutrons
- Neutrons and Protons
Q.5:- The last preferred technique in the disposal of Municipal Solid Waste is ?
- Incineration
- Composting
- Land Filling
- Bricketting
Q.6:- Sour taste of lemon is due to the presence of which of the following ?
- Citric Acid
- Acetic Acid
- Oxalic Acid
- Formic Acid
Q.7:- The constituents of automobile exhaust that can cause cancer is / are ?
- Oxides of Nitrogen
- Carbon Monoxide
- Polycyclic Hydrocarbons
- Lead
Q.8:- The most commonly used chemicals in the artificial rainmaking or cloud seeding are ?
- Silver Iodide (Ag I)
- Sodium Chloride (NaCl)
- Dry Ice (Frozen CO2)
- All of the above
Q.9:- Which one of the following metals does not react with water to produce Hydrogen ?
- Potassium
- Cadmium
- Sodium
- Lithium
Q.10:- An atomic clock is based on transition in ?
- Sodium
- Caesium
- Magnesium
- Aluminium
Q.11:- Sea water can be purified by the process of ?
- Distillation
- Evaporation
- Filtration
- Fractional Distillation
Q.12:- The gas used in the artificial ripening of fruits is ?
- Acetylene
- Methane
- Ethane
- Butane
Q.13:- Which metal is extracted from sea water ?
- Potassium
- Magnesium
- Aluminium
- Beryllium
Q.14:- The gas which turns into liquid at the lowest temperature among the following is ?
- Hydrogen
- Oxygen
- Helium
- Nitrogen
Q.15:- The amount of Chlorine available in water after disinfection is called as ?
- Free Chlorine
- Residual Chlorine
- Free Available Chlorine
- Combined Available Chlorine
Q.16:- Detergents clean surfaces on the principle of ?
- Viscosity
- Surface Tension
- Elasticity
- Floatation
Q.17:- Which gas does not form the part of atmosphere ?
- Nitrogen
- Helium
- Chlorine
- None of the above
Q.18:- Nuclear energy is a mineral based energy source. It is derived from ?
- Uranium
- Thorium
- Plutonium
- All of the above
Q.19:- Litmus is obtained from ?
- A bacterium
- A fungus
- An algae
- Lichen
Q.20:- Denatured spirit is Ethanol mixed with ?
- Petrol
- Kerosene
- Water
- Pyridine
Q.21:- An emulsion is a colloid of a ?
- Gas in a liquid
- Liquid in a liquid
- Liquid in a gas
- Gas in a solid
Q.22:- The most abundant inert gas in the atmosphere is ?
- Helium
- Neon
- Argon
- Krypton
Q.23:- Which of the following gases is most toxic ?
- Carbon Dioxide
- Carbon Monoxide
- Sulphur Dioxide
- Chlorine
Q.24:- Alum stops bleeding in minor cuts because of ?
- Solvation
- Emulsion
- Dialysis
- Coagulation
Q.25:- For determination of the age of which among the following is carbon dating method used ?
- Fossils
- Rocks
- Trees
- 1 & 2 Above
