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

Question 11 Mark

Assertion (A): Corrosion of iron is commonly known as rusting.
Reason (R): Corrosion of iron occurs in presence of moist air.

Answer

(b) Both A and R are true but R is not the correct explanation of A.
Explanation: Both A and R are true but R is not the correct explanation of A

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Question 21 Mark

Assertion (A): Vagina is also called a birth canal.
Reason (R): During birth, the baby passes through the vagina.

Answer

(a) Both A and R are true and R is the correct explanation of A.
Explanation: Vagina is called as birth canal because the baby passes through the vagina during birth.

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Question 31 Mark

Assertion (A): Deflection of the iron filings changes when current in the conductor varies.
Reason (R): Magnitude of the magnetic field does not change with the magnitude of current.

Answer

(c) A is true but R is false.
Explanation: Assertion is correct but the reason is wrong. As the current changes in the conductor, magnitude of the magnetic field produced also vanes which is the reason for a change in the deflection of the iron filings.

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Question 41 Mark

Assertion (A): Flow of energy in a food chain is unidirectional.
Reason (R): Energy captured by autotrophs does not revert back to the solar input and it passes to the herbivores.

Answer

(a) Both A and R are true and R is the correct explanation of A.
Explanation: The flow of energy through different steps in the food chain is unidirectional. This means that energy captured by autotrophs does not revert back to the solar input and it passes to the herbivores.

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Science Assertion - Reasoning (1 Marks)

Assertion - Reasoning (1 Marks)

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