Q.1:- Which of the following is biodegradable ?
- Paper
- D.T.
- Aluminium
- Plastic
Q.2:- The metal, used to galvanise Iron to protect it from rusting is ?
- Zinc
- Chromium
- Lead
- Antimony
Q.3:- Among the fuels given below, the one with highest calorific value is ?
- Coke
- Coal
- Wood
- Natural Gas
Q.4:- Hardest allotrope of Carbon is ?
- Diamond
- Graphite
- Coke
- Lamp Black
Q.5:- The number of neutron present in an element having mass number 226 and atomic number 88 is ?
- 88
- 138
- 314
- 50
Q.6:- Lead pencil contains ?
- Lead
- Ferrous Sulphide
- Lead Sulphide
- Graphite
Q.7:- An example of major air pollutant is ?
- Oxygen
- Carbon Monoxide
- Helium
- Carbon Dioxide
Q.8:- The metal chiefly used for galvanising Iron is ?
- Zinc
- Mercury
- Cadmium
- Tin
Q.9:- Baking Soda is ?
- Potassium
- Carbonate
- Sodium Carbonate
- Sodium Bicarbonate
Q.10:- Two elements which can form a large number of compounds are ?
- Carbon and Hydrogen
- Carbon and Nitrogen
- Carbon and Oxygen
- Carbon and Sulphur
Q.11:- Dry Ice is ?
- Solid Ammonia
- Solid Sulphur Dioxide
- Dry Carbon Dioxide Gas
- Solid Carbon Dioxide
Q.12:- The wire of flash bulb is made of ?
- Copper
- Barium
- Magnesium
- Silver
Q.13:- One property of ammonia is ?
- It is insoluble in water
- It is a odourless gas
- It is a yellowish gas
- Its aqueous solution turns red litmus blue
Q.14:- Which of the following is used to increase the anti-knocking property of petrol ?
- Tetramethyl lead
- Tetraethyl lead
- Trimethyl lead
- Triethyl lead
Q.15:- Which one of the following contributes largely to the ‘Green House Effect’ ?
- Ozone
- Carbon Monoxide
- Carbon Dioxide
- Water Vapour
Q.16:- Find the odd one ?
- Marble
- Chalk
- Limestone
- Slaked Lime
Q.17:- Brass is made of ?
- Copper and Tin
- Tin and Lead
- Copper and Zinc
- Copper, Tin and Zinc
Q.18:- The liquid waste from kitchens and baths of residence is known as ?
- Domestic Sewage
- Storm Water
- Sullage
- Refuse
Q.19:- The chemical substance present in bones and teeth is ?
- Calcium Phosphate
- Calcium Chloride
- Calcium Sulphate
- Calcium Borate
Q.20:- The function of sedimentation tank in sewage treatment is to ?
- Disinfect the sewage
- Remove water content
- Aerate the sewage
- Remove suspended solids
Q.21:- One carat of diamond is equal to ?
- 100 mg
- 150 mg
- 200 mg
- 250 mg
Q.22:- The lightest radioactive element is ?
- Deuterium
- Polonium
- Tritium
- Uranium
Q.23:- The main source of Carbon Monoxide is ?
- Industrial Process
- Fuel Combustion
- Transportation
- Solid Waste Disposal
Q.24:- A colloidal system in which a liquid is dispersed in a liquid is called ?
- Gel
- Emulsion
- Sol
- Precipitate
Q.25:- Coating of solid waste with impervious material is known as ?
- Encapsulation
- Chemical Fixation
- Landfill
- Capping
