>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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