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Standard XII

Chemistry

Diamond

Assertion :'D...

Question

Assertion :'Diamond are forever' is generally quoted for diamond as a rate of conversion of diamond to graphite at room condition is nearly zero. Reason: At room condition, conversion of diamond into graphite is spontaneous.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct.

Room temperature conversion of diamond into graphite is non-spontaneous.

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Similar questions

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices.

(a) Assertion and Reason both are correct statements an Reason is correct explanation for Assertion.

(b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion.

(d) Assertion is wrong statement but Reason is correct statement.

Assertion (A) Graphite is a good conductor of electricity however diamond belongs to the category of insulators.

Reason (R) Graphite is soft in nature on the other hand diamond is very hard and brittle.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Q. Choose the correct option for the given assertion and reason.
Assertion: Two plane mirrors kept at right angle deviate any ray of light by

180^{\circ}

after two successive reflections.
Reason: The above condition is satisfied only for angle of incidence,

i = 45^{\circ}

Assertion: Be and Al have similar properties.

Reason: $B e^{2 +}$ and $A l^{3 +}$ have nearly the same charge/volume ratios and similar polarising power.

Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

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Assertion :'Diamond are forever' is generally quoted for diamond as a rate of conversion of diamond to graphite at room condition is nearly zero. Reason: At room condition, conversion of diamond into graphite is spontaneous.

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for AssertionAssertion is correct.Room temperature conversion of diamond into graphite is non-spontaneous.

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct.

Room temperature conversion of diamond into graphite is non-spontaneous.