2007 JAMB UTME Chemistry Past Questions

2007

The oxidation state of oxygen in tetraoxosulphate(IV) acid is

2007

Trioxonitrate (V) acid is not used for preparing hydrogen gas from metals because it

2007

A solution which on treatment with hydrochloric acid produces a colourless, odourless gas which turns lime water milky is most likely to be a

2007

When calcium oxide is heated with carbon, the oxide will

2007

An element used in the production of matches is

2007

Cu2+(aq) + 4NH3(g) ↔ [Cu(NH3)4]2+(aq)In the reaction above, what is the effect of precipitating Cu2+(aq) as CuS(s)?

2007

The tincture of iodine means iodine dissolved in

2007

Na2S2O3(aq) + 2HCl(aq) → 2NaCl(aq) + H2O(l)Which of the following would introduce the greatest increase in the rate of the chemical reaction above?

2007

The reddish-brown rust on iron roofing sheets consists of

2007

The soft solder used for welding and plumbing is alloy of

2007

The reaction that takes place in Daniell cell is

2007

H3PO4(aq) + H2O(l) ↔ H2PO4-(aq) + H3O+(aq)ΔH = -13kJ at 298KIn the reaction above, an increase in temperature would

2007

If chlorine is bubbled into water and the resulting yellowish-green solution is exposed to bright sunlight for a while, the solution will decompose giving out

2007

Which of the following sets of metals dissolves in dilute HCl?

2007

Copper and silver metals are commonly use as coin because they are

2007

The salt formed from strong acid and a strong base is

2007

How long would it take to deposit 0.08g of copper from CuCl2 solution by passing a current of 0.5A?[Cu = 64, F = 96500 C mol-1]

2007

C2H4(g) + H2(g) → C2H6(g) ΔH = -137kJ mol-1The reaction represented above is

2007

What happens when zinc rod is immersed in copper (II) tetraoxosulphate (VI) solution/

2007

Calculate the mass of chlorine gas which occupies a volume of 1.12dm3 at s.t.p[Cl = 35.5, molar volume of gas at s.t.p = 22.4 dm3

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