Post Utme Ladoke Akintola University of Technology Chemistry Past Questions and Answers

Question 16:

The order of decreasing s-character of \(Sp , Sp ^{3} \& Sp ^{2}\) is _____________

A. \(Sp , Sp ^{2}, Sp ^{3}\)
B. \(Sp ^{3}, Sp ^{2}, Sp\)
C. \(Sp ^{2}, Sp , Sp ^{3}\)
D. \(Sp , Sp ^{3}, Sp ^{2}\)

Question 17:

Brass and Bronze are both metallic alloys.
Which of the following constituents is common to both alloys?

A. Lead
B. Copper
C. Tin
D. Zinc

Question 18:

The major process of manufacturing caustic soda on industrial scale is _____________

A. Reduction of brine
B. Fusion of sodium and hydroxide
C. Flectrolysis of hrine.
D. Concentration of brine

Question 19:

Which of these compounds is not used as a fertilizer?

A. Sodium hydroxide
B. Carbamide
C. Ammonium trioxonitrate
D. Potassium tetraoxosulphate VI

Question 20:

How many molecules are there in \(5.6 dm 3\) of ammonia at s.t.p.? G.V.M. \(=224\) am 3 at s. \(s\). \(NA =6.02 \times 10^{23} moV\)

A. \(1.50 \times 10^{20}\)
B. \(1.50 \times 10^{21}\)
C. \(1.50 \times 10^{22}\)
D. \(1.50 \times 10^{23}\)