Olympiad Class 7 Science Mock Test Set A

Question. What are the gases formed during lightning?
(A) Sulphur dioxide and Sulphur trioxide
(B) Nitric oxide and Nitrogen dioxide
(C) Carbon monoxide and Carbon dioxide
(D) Nitrogen trioxide and Sulphur dioxide
Answer : B

Question. The structure of a fabric with its component units X, Y linked is given below

Identify the fabric from the following.
(A) PVC
(B) Polycot
(C) Polystyrene
(D) Polyethylene
Answer : B

Question. Which apparatus is used for electrolysis of substances?
(A) Electroscope
(B) Voltameter
(C) Voltmeter
(D) Ammeter
Answer : B

Question. The diagram below shows a plant cell. Which part helps to keep the plant cell firm?

(A) W
(B) X
(C) Y
(D) Z
Answer : A

Question. In which of the following friction plays a helpful role?
(A) Striking a match stick
(B) Playing snooker
(C) Writing on black board
(D) All of the above
Answer : D

Question. Which of the following is an example of a liquid fuel?
(A) Paraffin wax
(B) Coal gas
(C) L.P.G
(D) Alcohol
Answer : D

Question. Which of the following precautions need not be taken during a thunderstorm?
(A) Avoid contact with running water.
(B) Do not carry an umbrella.
(C) Electrical lights should be unplugged.
(D) Stay away from poles or other metal objects.
Answer : C

Question. Which of these is NOT an activity of bacteria?
(A) The digestion of cellulose in herbivores
(B) The production of antibiotics
(C) The decomposition of waste matter
(D) Assimilation of food
Answer : D

Question. The distance between two consecutive crests in a wave is called
(A) wavelength
(B) amplitude
(C) displacement
(D) wave pulse
Answer : A

Question. Variously coloured plastids are called
(A) Chloroplasts
(B) Chromoplasts
(C) Leucoplasts
(D) Both (A) and (B)
Answer : B

Question. Which of the following is not a renewable source of energy?
(A) Coal
(B) Wood
(C) Cow dung
(D) Agriculture waste
Answer : A

Question. Which of the following requires a pushing force?
(A) Throwing a stone at a bird
(B) Grabbing hold of a pencil
(C) Leaves falling from a tree
(D) A load lifted by a pulley
Answer : A

Question. Identify a natural phenomenon that shows dispersion of light.
(A) Rainbow
(B) Tsunami
(C) Thunder
(D) Lightning
Answer : A

Question. Which of the following is the property of thermoplastics?
(A) They do not bend.
(B) They do not get deformed easily.
(C) They are resistant to most chemicals.
(D) They are long polymer chains with strong bond.
Answer : C

Question. Why are car bumpers often coated with chromium?
(A) To prevent them from rusting
(B) To prevent them from corrosion
(C) Make them look better
(D) Both (A) and (B)
Answer : D

Question. Which of the following is an effect of deforestation?
(A) Water pollution
(B) Greenhouse effect
(C) Outbreak of diseases
(D) Extinction of aquatic life
Answer : B

Question. Which of the following actions demonstrate friction as an evil?
(A) Writing on a paper with pen.
(B) Riding a bicycle.
(C) Playing a musical instrument.
(D)Walking on a wet marble surface.
Answer : B

Question. Which of the following has a high melting point, a good conductor of electicity and can be drawn into sheets?
(A) Silicon
(B) Sodium Chloride
(C) Iron
(D) Carbon
Answer : C

Question. Which of the following is prominent in the early warning of a cyclone?
(A) Satellite
(B) Jet planes
(C) Helicopters
(D) Submarines
Answer : A

Question. Which of the given figures represents budding in hydra?

Answer : C