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

Question 16:

The order of decreasing s-character of $Sp,S{p}^3\mathrm{\&}S{p}^2$ is _____________

A. $Sp,S{p}^2,S{p}^3$
B. $S{p}^3,S{p}^2,Sp$
C. $S{p}^2,Sp,S{p}^3$
D. $Sp,S{p}^3,S{p}^2$

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 $5.6dm3$ 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. $1.50\times {10}^{23}$