Question 806:

• JAMB 1993

The fraction of crude oil used as jet fuel is?

A. Refinery gas
B. Diesel oil
C. Kerosene
D. Gasoline

Question 807:

• JAMB 1993

It is not desirable to use lead tetraethyl as an anti-knock agent because?

A. It is expensive
B. Of pollution effects from the exhaust fumes
C. It lowers the octane rating of petrol
D. It is explosive

Question 808:

• JAMB 1993

Al₂O_3(s) + 3H₂SO_4(aq) → Al₂(SO_4(aq)) + 3H_2(I)O
Al₂O_3(s) + 2NaOH_(aq)) + 3H_2(I)O → 2NaAl(OH)_4(aq)).
We can conclude from the equations above that Al₂O_3(s) is?

A. An acidic oxide
B. An amphoteric oxide
C. A basic oxide
D. A neutral oxide

Question 809:

• JAMB 1993

The carbon atoms on ethane are?

A. Sp² hybridized
B. Sp³ hybridized
C. Sp²d hybridized
D. Sp hybridized

Question 810:

• JAMB 1993

Palm wine turns sour with time because?

A. The sugar content is converted into alcohol
B. The carbon (IV) oxide formed during the fermentation process has a sour taste
C. It is commonly adulterated by the tappers and sellers
D. Microbial activity results in the production of orgain acids within it