How many primary amines are possible for the formula C4div1N?
(a) 4
(b) 2
(c) 3
(d) 5

To determine the number of primary amines possible for the formula C4H11N, we need to consider the different ways the nitrogen (N) atom can be attached to the carbon (C) atoms in the molecule.

In the formula C4H11N, there are four carbon atoms (C4) and one nitrogen atom (N). A primary amine has the general structure RNH2, where R represents an alkyl group.

Let's examine the different possibilities:

When the nitrogen atom is attached to one of the terminal carbon atoms (C1 or C4), we have R = CH3. So, we have one possible primary amine: CH3NH2.

When the nitrogen atom is attached to one of the two adjacent carbon atoms (C2 or C3), we have R = C2H5. This gives us two possible primary amines: C2H5NH2 and C2H5NHCH3 (N-methyl ethylamine).

Therefore, the correct answer is (c) 3 primary amines are possible for the formula C4H11N.