Question

Smallest possible alkane with ethyl group as substituent possess molecular mass
(1) 16
(2) 72
(3) 84
(4) 100​

Answer 1

Answer:

option (4)100g

Explanation:

Ethyl group must be a substituent i.e. carbon chain which is to be considered has ethyl group as the substituent.

Lets start with propane as it is greater than ethane but u wont get any possible arrangement which satisfies the condition.

Take butane, even that won't satisfy

Take pentane, 2-ethyl pentane will become 2-methyl hexane acc to IUPAC

So take 3-ethyl pentane & it satisfies the condition perfectly

& Its molecular weight is 100 g...

Answer 2

Answer:

100 is the correct answer