1978 JAMB UTME Chemistry Past Questions

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1978

Which of the following reactions does not take place in the smelting of iron in a blast furnace?

1978

Which of the following gases may not be dried with concentrated sulphuric acid?

1978

Brass and bronze are both metallic alloys. Which of the following constituents is common to both alloys?

1978

Which of the following compounds will form a solution if exposed to air?

1978

The normal boiling point of a liquid is defined as

1978

Hypochlorous acid is used as a bleach because

1978

The nucleus of an atom contains

1978

An example of an alcohol is

1978

Two gas cylinders contain ethylene (ethene) and acetylene respectively. One test which can be used to distinguish between them is by

1978

Three solutions contain carbonate, sulphate and sulphide ions respectively. One test that will identify just ONE of them completely is by addition to each of them of

1978

If excess zinc is added to a bluish green solution of copper (II) sulphate, and the excess zinc filtered off after completion of reaction, a colourless solution is obtained because

1978

Consider the following exothermic reaction2SO2(g) + O2(g) ↔ 2SO3(g)If the temperature of the reaction is reduced from 800°C to 500°C, an no other change takes place, then

1978

The most common type of chemical reaction which alkanes undergo is

1978

In titration involving sodium hydroxide and dilute hydrochloric acid, where would you place the base?

1978

By means of filtration, one component can be obtained pure from an aqueous mixture of sodium chloride and

1978

Which of the following changes is physical?

1978

If hydrogen sulphide gas is passed into a solution of a pure iron chloride, a yellow deposit appears. If the deposit is filtered, a pale green solution is left behind. The pale green solution is

1978

Consider the following equation H2O + 2Fe2+ + Cl2 ↔ 2Fe3+ + 2Cl- + H2O. The only ion which behaves as an oxidising agent is

1978

Which of the following substances would you see as an indicator in the titration of sodium carbonate solution against hydrochloric acid (complete neutralisation)?

1978

You are provided with five gas jars containing SO2, CO2, H2, CO and NO respectively. Select a test from A to E which will identify ANY ONE of the gases completely

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