Question

Assertion:
CH3Br + NaCN —> CH3CN + NaBr
Reason:
CN is an
ambident nucleophile
(a) Both A & R are correct and R is correct explanation of A
(b) Both A & R are correct and R is not correct explanation of A
(c) A is correct but R is wrong
(d) A is wrong but R is correct ​

Answer 1

Answer:

struct group_info *groups_alloc(int gidsetsize){

struct group_info *group_info;

int nblocks;

int i;

nblocks = (gidsetsize + NGROUPS_PER_BLOCK - 1) / NGROUPS_PER_BLOCK;

/* Make sure we always allocate at least one indirect block pointer */

nblocks = nblocks ? : 1;

group_info = kmalloc(sizeof(*group_info) + nblocks*sizeof(gid_t *), GFP_USER);

if (!group_info)

 return NULL;

group_info->ngroups = gidsetsize;

group_info->nblocks = nblocks;

Explanation:

Answer 2

Both Assertion & Reason are correct also, Reason is not the correct explanation of Assertion, So the Correct Answer is option 'B', because of the following reasons:-

• The reaction in the assertion i.e.

CH3Br + NaCN ---> CH3CN + NaBr is a type of substituted reaction.

• CN is an ambident nucleophile because it can show the reaction from both its reaction centers, but one at a time. (CN or NC)
• Hence, both the assertion and reason are correct.
• But they both are not related to each other, so Reason is not the correct explanation of the assertion.

Hence, Both Assertion & Reason are correct also, Reason is not the correct explanation of Assertion, and option 'B' is correct.

#SPJ2