Skip to content
Question 66 of 83

Q.Which of the following is aliphatic saturated hydrocarbon?

(a) C9H18
(b) C8H14
(c) C8H18
(d) All of the above
Puducherry TnboardTamil Nadu HSC First Year (DGE) Board 2022MCQ· 1mImportance★★★★★
80% · 66/83 Questions
🔒 Locked · start free trial →

You're viewing a preview — the full solution, concept, methods & PYQ mapping are locked.

Start your 14-day free trial to unlock the full solution →

C8H18 fits the alkane general formula CnH2n+2 exactly, so it is the aliphatic saturated hydrocarbon; the other formulas correspond to unsaturated or cyclic hydrocarbons.

An aliphatic hydrocarbon is an open-chain (non-aromatic) compound built only from carbon and hydrogen. It is saturated when every carbon-carbon bond is a single bond, which fixes its formula as CnH2n+2 (an alkane).

Check each option against CnH2n+2:

  • C9H18: for n = 9, a saturated alkane would need 2(9)+2 = 20 hydrogens, but only 18 are present, so this formula is CnH2n — an alkene (or a saturated ring compound), not an open-chain saturated hydrocarbon.
  • C8H14: for n = 8, an alkane would need 18 hydrogens; only 14 are present, so this is highly unsaturated (a diene, alkyne, or polycyclic structure). …
Start your 14-day free trial to unlock the full solution →

Unlock everything free for 14 days

  • Full step-by-step solutions
  • Concept-first explanations
  • Methods, shortcuts & mistakes
  • PYQ mapping + timed mock tests
Start 14-day free trial →See Plans & Pricing →

Full access for 14 days. No credit card required.

←Previous questionQ15 — (a) (i) Write Birch reduction. (ii) Write any three strategies to cont…→Next questionQ17 — What happens when ethylene is passed through cold dilute alkaline pota…