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Assertion :As...

Question

Assertion :Assertion : Electrons do not experience strong nuclear force. Reason: Reason : Strong nuclear force is charge - independent force.

A

If both assertion and reason are true and reason is the correct explanation of assertion

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B

If both assertion and reason are true and reason is not the correct explanation of assertion.

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C

If assertion is true but reason is false.

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D

If both assertion and reason are false.

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Solution

The correct option is B If both assertion and reason are true and reason is not the correct explanation of assertion.
Strong nuclear force is charge independent and acts equally between a proton and a proton, a neutron and a neutron, and a proton and a neutron. It is responsible for the stability of nuclei and its range is $10^{- 15}$ m. Since electrons are present outside the nucleus. Hence, they do not experience strong nuclear force.

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Q. (i)
Assertion: A circle is not a rectilinear figure.
Reason: A figure formed by straight lines only is called a rectilinear figure.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.
(ii)
Assertion: All right angles are equal to one another.
Reason: A unique line passes through a single point.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
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(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.

Assertion (A): Steel is more elastic than rubber.

Reason (R) : Under a given deforming force, steel is deformed less than rubber.

A) Both Assertion and Reason are true and the reason is correct explanation of the assertion
B)Both Assertion and Reason are true, but reason is not correct explanation of the assertion
C) Assertion is true, but the reason is false
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Q. Read the assertion and reason carefully to mark the correct option out of the options given below:

(a)If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b)If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c)If assertion is true but reason is false.

(d)If assertion is false but reason is true.
Assertion: Ionisation enthalpies for early actinoids are lower than that for early lanthanoids.
Reason: 5f electrons more effectively shielded from the nuclear charge than the 4f electrons
of the corresponding lanthanoids.

{Mg}^{2 +}

{Al}^{3 +}

are isoelectronic but ionic radius

{Al}^{3 +}

is less than that of

{Mg}^{2 +}

.
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{Al}^{3 +}

is more than that in

{Mg}^{2 +}

.

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