Carbon percentage (by weight) in crude petroleum may be about_________________?

Which of the following has maximum hydrogen/carbon ratio (by weight) ?

A. Naphtha

B. Gasoline

C. Diesel

D. Fuel oil

CnH2n is the general formula for_______________?

A. Olefins

B. Naphthenes

C. Both A. and B.

D. Neither A. nor B.

In catalytic cracking, the___________________?

A. Gasoline obtained has a very low octane number

B. Pressure & temperature is very high

C. Gasoline obtained has very high aromatic content

D. Gasoline obtained has very high amount of gum forming compounds

Pressure & temperature maintained in catalytic cracking is about__________________?

A. 2 atm & 500°C

B. 10 atm & 500°C

C. 30 atm & 200°C

D. 50 atm & 750°C

Which of the following has the lowest cetane number ?

A. Aromatics

B. i-paraffins

C. Naphthene

D. Olefins