Question

In which of the following tert. carbon is absent
(A) Iso octane (B) Triptane
(C) Isopropyl amine
(D) Isopentane​

Answer 1

Explanation:

Octane Number of at least 98, which comprises: component (a) comprising at least one hydrocarbon having the following formula I R-CH2-CH(CH3)-C(CH3)2-CH3 (I) wherein R is hydrogen or methyl and component

(b) at least one saturated liquid aliphatic hydrocarbon having 4-10 carbon atoms wherein at least 30% by volume of the total composition is a hydrocarbon of formula I.

2. A composition according to Claim 1 wherein the hydrocarbon of formula I is triptane.

3. A composition according to Claim 1 having a Reid Vapour Pressure at 37.8°C of 38 - 60 kPascals, preferably 38-49 kPascals.

. A composition according to Claim 1 having a Reid Vapour Pressure at 37.8°C of 38 - 60 kPascals, preferably 38-49 kPascals.4. A composition according to Claim 1 wherein component (b) comprises a component (Ifl) which is more volatile and has a lower boiling point than triptane, with a Motor Octane Number greater than 88, preferably iso-pentane.