LAUTECH 2009 CHEMISTRY POST-UTME

CHEMISTRY
LADOKE AKINTOLA UNIVERSITY
2009
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1. How many unpaired electrons are there in the electronic configuration of an element with atomic number 8?
A. 2
B. 3
C. 4
D. 5

2. 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

3. T he major process of manufacturing caustic soda on industrial scale is
A. Reduction of brine
B. Fusion of sodium and hydroxide
C. Electrolysis of brine
D. Concentration of brine

4. O ne mole of propane is mixed with five moles of oxygen . The mixture is ignited and the propane burns completely . What is the volume of the products at s.t.p?
[G.M.V. = 22.4dm 3 mol -1 ]
A. 112.0dm 3
B. 67.2dm 3
C. 56.0dm 3
D. 4.8dm 3

5. T he 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

6. W hich of these is not a hydroscopic salt ?
A. Calcium oxide
B. Magnesium chloride
C. Copper(II)oxide
D. Sodium trioxonitrate(V)

7. T he Secondary valence is called
A. Oxidation state
B. Lewis base
C. Coordination number
D. chelates

8. T he formula of the compound formed in a reaction between a trivalent metal , M and a tetravalent non-metal X is
A. MX
B. M 3 X 4
C. M 4 X 3
D. M 3 X 2

9. W hich of these compounds is not used as a fertilizer ?
A. Sodium hydroxide
B. Carbamide
C. Ammonium trioxonitrate
D. Potassium tetraoxosulphateVI

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