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Ans 2: (Master Answer)
D
According to the given table, P is a sense organ with bones and muscles. It cannot be eye, as eye does not have bones. Q is a sense organ having muscles but no bones. It cannot be nose as nose has bones.R and S are not sense organs. They can be any other organ. R has both bones and muscles, so it cannot be heart, as heart does not have bones. S has muscles but no bones, so it can be small intestine which absorbs digested food and passes it into blood.
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Ans 4:
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Ans 2: (Master Answer)
D
L → It has no definite volume → It can be compressed → So, L can be a gas like oxygen or nitrogen.
M → It has a definite volume → It does not have a definite shape → So, M can be a liquid that takes the shape of the container in which it is kept..
N → It has a definite volume → It has a definite shape → So, N can be a solid whose molecules have strong force of attraction between them and are very tightly packed.