Assertion - Reasoning (1 Marks) - Science STD 10 Questions

Question 11 Mark

Assertion (A): The colour of aqueous solution of copper sulphate turns colourless when a piece of lead is added to it.
Reason (R): Lead is more reactive than copper, and hence displaces copper from its salt solution

Answer

(a) Both A and R are true and R is the correct explanation of A.
Explanation: Both A and R are true and R is the correct explanation of A.

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Question 21 Mark

Assertion (A): Regeneration is getting a full organism back from its body parts.
Reason (R): In grafting, the stock is placed over the scion.

Answer

(b) Both A and R are true but R is not the correct explanation of A.
Explanation: Regeneration is the process which involves repair of damaged cells/tissue or replacement or redevelopment of broken body part or reconstruction of whole body from a small body fragment. The simple animals like Hydra and Planaria
show regeneration. It means if Hydra or Planaria somehow get cut into a number of pieces, then each body piece can grow into
a complete organism.

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Question 31 Mark

Assertion (A): Two bar magnets attract when they are brought near to each other with the same pole.
Reason (R): Unlike poles will attract each other.

Answer

(d) A is false but R is true.
Explanation: A is false but R is true.

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Question 41 Mark

Assertion (A): The second trophic level of a food chain operating in a grassland is mostly occupied by a carnivore
Reason (R): Carnivores feed upon herbivores and are secondary consumers.

Answer

(d) A is false but R is true.
Explanation: The second trophic level of a food chain is occupied by herbivores that feed on plants or producers that are
present in first trophic level.

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Science Assertion - Reasoning (1 Marks)

Assertion - Reasoning (1 Marks)

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