GATE Chemical Engineering Questions and Answers - 2

Question: 6

Which of the following additives improves the cetane number of diesel?

(A) tetra ethyl lead

(B) naphthenic acid

(C) ethyl mercaptan

(D) amyl nitrate

Question: 7

Which is the most effective catalyst used in catalytic cracking of petroleum products?

(A) zeolite

(B) vanadium pentoxide

(C) nickel

(D) iron oxide

Question: 8

Which of the following is the most important property of a jet fuel?

(A) colour

(B) cloud point

(C) freezing point

(D) pour point

Question: 9

Tetra ethyl lead is added in gasoline to

(A) reduce the pour point

(B) reduce gum formation

(C) increases its octane number

(D) increases its smoke point

Question: 10

Alkylation is

(A) converts olefin into paraffin

(B) converts iso-paraffin into olefin

(C) causes olefin to combine with each other

(D) causes olefin to combine with isoparaffins