For question two statements are given- one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:

Both A and R are true, and R is correct explanation of the assertion.
Both A and R are true, but R is not the correct explanation of the assertion.
A is true, but R is false.
A is false, but R is true.

Assertion: Diamond and graphite do not have the same crystalline structure.
Reason: Diamond is crystalline while graphite is amorphous.

Question

For question two statements are given- one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:

Both A and R are true, and R is correct explanation of the assertion.
Both A and R are true, but R is not the correct explanation of the assertion.
A is true, but R is false.
A is false, but R is true.

Assertion: Diamond and graphite do not have the same crystalline structure.
Reason: Diamond is crystalline while graphite is amorphous.

Shiksha Nation · Accepted Answer

(c) A is true, but R is false.
Explanation:
In diamond, each C-atom is bonded to four other &lsquo;C&rsquo; atoms and form rigid 3-D structure while, in graphite each &lsquo;C&rsquo; atom is bonded to three other &lsquo;C&rsquo; atoms in hexagonal array & form layer one above the other.
Diamond and graphite both are crystalline forms of carbon.

Verified Answer

Verified Answer