CBSE Class 9 Science Questionbank

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16 of 16

Question 1 · 16 total

easy+1

Evaporation of a liquid causes cooling because:

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Question 2 · 16 total

easy+1

Which organelle is known as the powerhouse of the cell?

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Question 3 · 16 total

easy+1

A distance-time graph is a horizontal line parallel to the time axis. The body is:

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Question 4 · 16 total

medium+1

Find the weight (in N) of a 10 kg object on Earth. [Take $g = 10\ \mathrm{m/s^2}$ ]

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Question 5 · 16 total

easy+1

The molecular mass of water $H_2O$ is approximately:

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Question 6 · 16 total

medium+1

According to Newton's third law, action and reaction forces:

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Question 7 · 16 total

hard+1

The electronic configuration of an atom with atomic number 17 is:

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Question 8 · 16 total

medium+1

A sound wave has frequency 100 Hz and wavelength 3.4 m. Its speed (in m/s) is:

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Question 9 · 16 total

medium+1

Which vascular tissue transports water and minerals upward from the roots?

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Question 10 · 16 total

medium+1

Brass is an example of a:

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Question 11 · 16 total

medium+1

Assertion: A person carrying a box on his head while walking horizontally on level ground does no work against gravity.

Reason: The force applied against gravity is perpendicular to the horizontal displacement.

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Question 12 · 16 total

easy+1

Composite fish culture is adopted mainly because it:

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Question 13 · 16 total

hard+1

A body weighs slightly more at the poles than at the equator mainly because:

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Question 14 · 16 total

easy+1

Sound cannot travel through:

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Question 15 · 16 total

medium+1

Find the kinetic energy (in J) of a 2 kg ball moving at 3 m/s.

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Question 16 · 16 total

hard+1

The number of moles present in 22 g of carbon dioxide is:

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