Of the following metals, which one pollutes the air of a big city?

A). Copper

B). Cadmium

C). Lead

D). Chromium


Bell Metal is an alloy of—

A). Brass and Nickel

B). Zinc and Copper

C). Tin and Copper

D). Nickel and Copper


The high temperature superconductors are—

A). Metal alloys

B). Ceramic oxides

C). Inorganic polymers

D). Pure rare earth metals


Permanent hardness of water may be removed by the addition of___________?

A). Sodium Carbonate
B). Alum
C). Potassium Permanganate
D). Lime


Human eye is how many Megapixels?

A). 1080 MP
B). 720 MP
C). 576 MP
D). 570 MP


Vitamin C is essential for___________?

A). Appetite
B). Growth & repairing of tissues
C). Muscles
D). Brain


Who discovered that the earth was not the center of the universe?

A). Aristotle
B). Nicolaus Copernicus
C). Sir Isac Newton
D). None


For the generation of biogas, the materials commonly used are__________?

A). Animal wastes
B). Forest residues
C). Aquatic plants
D). None of these


Which of these is NOT an example of a renewable energy source?

A). Wind energy
B). solar
C). Coal
D). Hydroelectric power


Which of these is NOT a form of energy?

A). Heat
B). Light
C). Temperature
D). Electricity

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