1979 JAMB UTME Chemistry Past Questions

1979

In the extraction of aluminum from purified bauxite by electrolysis, cryolite is used because

1979

Which one of these compounds will NOT give an oxygen gas on heating?

1979

0.1 Faraday of electricity was passed through a solution of copper (ll) sulphate. The maximum weight of copper deposited on the cathode would be [Cu = 64]

1979

Indicate which of the following statements is not true as we move from left to right along the periodic Table:

1979

The reaction between hydrogen and iodine may be represented by the equation H2(g)+ I2(g) → 2HI(g), and is exothermic. Therefore

1979

Starch can be converted to ethyl alcohol by

1979

Calcium hydroxide and ammonium chloride when heated together will give an important product. This compound may be obtained dry by

1979

In which of the following reactions is sulphur dioxide acting as an oxidizing agent?

1979

An anhydride is

1979

The reaction 3C(s) + 2Fe2O3(s) = 4Fe(s) + 3CO2(g): \(\Delta\)H =46.0 kJ is

1979

the vapour density of a gas may be defined as

1979

Which of the following statements is true?

1979

In the manufacture of iron in the blast furnace, iron (lll) oxide is mixed with coke and limestone, and different reactions occur in the process. Which of the following statements is true with respect to these reactions?

1979

Weighed salts Y and Z were left exposed in the laboratory overnight. In the morning Y had gained weight, and Z had become liquid. What conclusion could be drawn about the nature of the two salts?

1979

Phosphorus burns in oxygen according to the equation P4 + 502 → P4O10. How many litres of oxygen will be required at S.T.P for complete oxidation of 12.4g of phosphorus? [P = 31,O = 16 and molar volume of a gas at S.T.P…

1979

Bronze is an alloy of

1979

Two metallic ions associated with hard water are

1979

Hydrogenation may be effected by

1979

The solution of a sample in a tube will be identified as a chloride if it gives

1979

Which of the following raw materials would be required from the smelting of iron ore in a blast furnace?

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