1)When a beam of white light passes through a prism, the color that undergoes the least deviation is –
a) Violet
b) Indigo
c) Red
d) Green
Ans:c
2) Which of the following is a chemical change?
a) Iron filings
b) Evaporation of alcohol
c) Freezing of ice
d) Burning of coal
Ans:d
3) Which fertilizer is prepared by treating ammonia gas with dilute sulphuric acid?
a) Basic Calcium Nitrate
b) Urea
c) Calcium Ammonium Nitrate
d) Ammonium Sulphate
Ans: d
4) The hardest material in the following is
a) Glass
b) Iron
c) Diamond
d) Wood
Ans: c
5) When the vapour is passed on red-hot coke, we get
a) Water-gas
b) Hydrogen
c) Nitrogen
d) Carbon dioxide
Ans: a
6) The mirror used in automobiles to see the rear field of view is
a) Plane mirror
b) Convex mirror
c) Concave mirror
d) None of these
Ans: b
7) Steam at 100°C causes more severe burns than water at the same temperature because
a) Steam reacts faster than water with skin
b) Steam is combustible
c) Steam is a gas
d) Steam can provide more heat
Ans: d
8) Soda water is a
a) Suspension
b) Precipitate
c) Colloid
d) Solution
Ans:d
9) A person is standing on a weighing machine in a moving lift. The weighing machine will show the least reading, when –
a) Going up with a uniform speed
b) Coming down with a uniform velocity
c) Going up with a uniform velocity
d) Freely falling lift
Ans: d
10) In an oil lamp, there is a hole in the chimney, because:
a) Smoke may come out
b) A lamp may glow with brilliance
c) Oxygen may be available to the glowing lamp
d) Heat due to glowing may continue to go out
Ans: c
11) Which colour of light has the maximum wavelength?
a) Yellow
b) Blue
c) Red
d) Green
Ans:c
12) Which amongst the following pairs is not correctly matched?
a) Pascal – Pressure
b) Gauss – Light
c) Ampere – Current
d) Electric potential – Volt
Ans: b
13) The mineral structure of diamond is:
a) Zinc
b) Nickel
c) Nitrogen
d) Carbon
Ans : d
14) Which of the following is an example of fossil fuel?
a) Coke
b) Natural gas
c) Coal gas
d) Producer gas
Ans: b
15) What causes cholera?
a) Bacteria
b) Virus
c) Fungus
d) Algae
Ans: a
16) The organic acid present in vinegar is:
a) Butanoic acid
b) Propanoic acid
c) Methanoic acid
d) Ethanoic acid
Ans:d
17) The electric current which changes its direction after fixed intervals of time is called:
a) Induced current
b) Direct current
c) Alternating current
d) None of these
Ans: c
18) When two bodies are rubbed against each other, they acquire:
a) Equal and similar charges
b) Equal and opposite charges
c) Unequal and similar charges
d) Unequal and opposite charges
Ans: b
19) Which of these converts sunlight directly into electrical energy?
a) Solar cooker
b) Solar cell
c) Solar furnace
d) Solar water heater
Ans: b
20) Lighting is caused in the sky due to the flow of charge between:
a) Two oppositely charged clouds
b) Two similarly charged clouds
c) One neutral and one charged clouds
d) None of these
Ans: a
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