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

MCQ 11 Mark

In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Concave mirror is best suited for use in a solar cooker.
Reason : Concave mirror converges large amount of light of the sun into the solar cooker.

✓
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
C
If Assertion is true, but Reason is false.
D
If Assertion is false, but Reason is true.

Answer

Correct option: A.

If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

A concave mirror is best suited for use in a solar cooker. This is due to the reason that a concave mirror reflects and concentrates solar energy from over a large area into a small area.

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MCQ 21 Mark

In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : The hydrogen bomb is more harmful than nuclear fission.
Reason : Nuclear fusion produce more energy than nuclear fission.

✓
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
C
If Assertion is true, but Reason is false.
D
If Assertion is false, but Reason is true.

Answer

Correct option: A.

If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Hydrogen bombs, or $H-$ bombs, are far more powerful than the relatively simple atomic weapons. Hydrogen bombs, which incorporate both fission of uranium or plutonium and fusion of hydrogen, on the other hand range from $1 –58600$ kilotons.

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MCQ 31 Mark

Two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion $(A) :$ In the process of nuclear fission, the amount of nuclear energy generated by the fission of an atom of uranium is so tremendous that it produces $10$ million times the energy produced by the combustion of an atom of carbon from coal.
Reason $(R) : $ The nucleus of a heavy atom such as uranium, when bombarded with low energy neutrons, splits apart into lighter nuclei. The mass difference between the original nucleus and the product nuclei gets converted to tremendous energy.

✓
Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
B
Both $A$ and $R$ are true, but $R$ is not the correct explanation of the assertion.
C
$A$ is true, but $R$ is false.
D
$A$ is false, but $R$ is true.

Answer

Correct option: A.

Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.

Nuclear fission is a nuclear reaction where unstable heavy nuclei splits into two or more lighter nuclei. During this process, there is slight decrease in the sum of mass of daughter nuclei and parent nuclei. This decrease in mass is converted into energy.
This nuclear energy is $10$ million times the energy produced by the combustion of an atoms of carbon from coal.
Hence, both assertion and reason are correct and reason is the correct explanation of assertion.

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MCQ 41 Mark

In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Solar cells are used to convert solar energy into electrical energy.
Reason : The radiant heat present in solar energy does not change into electrical energy.

A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
✓
If Assertion is true, but Reason is false.
D
If Assertion is false, but Reason is true.

Answer

Correct option: C.

If Assertion is true, but Reason is false.

Solar $-$ powered photovoltaic $(PV)$ panels convert the sun's rays into electricity by exciting electrons in silicon cells using the photons of light from the sun. This electricity can then be used to supply renewable energy to your home or business.

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Science Assertion - Reasoning (1 Marks)

Assertion - Reasoning (1 Marks)

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