Post Utme Economics Past Questions and Answers

Question 851:

Carbon is often deposited in the exhaust pipe of cars because of the ____________

A. Dehydrogenation of petrol
B. Incomplete combustion of petrol
C. Presence of additives
D. Presence of carbon in petrol

Question 852:

Plastics are polymer whose production techniques involve all except ____________

A. High pressure
B. Low pressure
C. Salting
D. High temperature

Question 853:

Which of the following gasses is produced when ammonium trioxonitrate (v) is heated with Sodium hydroxide ?

A. Oxygen
B. Ammonia
C. Nitrogen (iv) oxide
D. Hydrogen

Question 854:

How many grammes of \(\mathrm{HCl}\) will be required to react with \(10 \mathrm{~g}\) of \(\mathrm{NaOH}\)
\((\mathrm{H}=1 . \mathrm{Cl}=1.35 .5 \mathrm{Na}=23, \mathrm{O}=16) ?\)

A. \(9.125 \mathrm{~g}\)
B. \(4.6 \mathrm{~g}\)
C. \(10.1 \mathrm{~g}\)
D. \(18.4 \mathrm{~g}\)

Question 855:

The bond formed between \(\mathrm{H}_2 \mathrm{O}\) and \(\mathrm{H}^{+}\)to form the hydroxonium ion is ____________

A. Co-ordinate covalency
B. Electrovalent
C. Covelent
D. Ionic