1994 WAEC SSCE Chemistry Past Questions

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1994

The components of universal indicator solution can best be separated by

1994

The number of atoms in 1.2g of carbon - 12 isotope is

1994

The oxidation number of phosphorus in PO 3/4 is

1994

Which of the following would increase the rate of reaction of chips of a metal M as shown in the equation below? M(s) + 2HCl(aq) → MCl2(aq) + H2(g)

1994

Which of the following is not a property of magnesium oxide?

1994

In any chemical reaction, the total mass of the products is always equal to that of the reactants. This is statement of the law of

1994

When naphthalene on heating changes from the solid state directly to the gaseous state it undergoes

1994

Calcium is usually extracted by the electrolysis of its

1994

Polyatomicity is illustrated by molecules of

1994

The following will decolourize acidified potassium tetraoxomanganate (VII) solution except

1994

Tetraoxosulphate (lV) acid is described as strong acid because it is highly

1994

When water is dropped on calcium carbide, the gaseous product is an

1994

Glucose can be obtained from starch by

1994

If the volume of a given mass of gas at 0oC is 27.3cm3, what will be the volume of the gas at 10oC, pressure remaining constant?

1994

Which of the following occurs when an aqueous solution of sodium hydroxide is electrolysed using graphite electrodes?

1994

The following compounds will decompose on heating except

1994

In a chemical reaction, the reacting species possess energy of motion known as

1994

Which of the following electronic structures belongs to a noble gas?

1994

Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)From the equation above what mass of hydrogen would be produced if 12.0 g of magnesium reacted completely with dilute hydrochloric acid? (H = 1, Mg = 24)

1994

The gaseous product formed when ammonia is passed over heated copper (ll) oxide is

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