2002 WAEC SSCE Chemistry Past Questions

2002

The atomic number of chlorine is 17. What is the number of electrons in a chloride ion?

2002

Determine the mass of sulphur (IV) oxide obtained when 91.0g of oxygen reacts completely with sulphur according to the following equation: S(s) + O2(g) → SO2(g) [S = 32; O = 16]

2002

Calculate the mass of chlorine gas which occupies a volume of 1.12 dm3 a volume of 1.12 dm3 at s.t.p [Cl = 35.5, 1 mole og gas occupies 22.4 dm3 at s. t. p ]

2002

Which of the following decreases when a given mass of gas is compressed to half its initial volume?

2002

A major factor considered in selecting a suitable method for preparing a simple salt is its

2002

What is the expression for the equilibrium constant (Kc) for the following reaction? N2(g) + O2(g) ⇌ 2NO(g)

2002

Which of the following salt solutions will have a pH greater than 7?

2002

Consider the following equation: Cr2O2-7(aq) + 14H+(aq) + 6e- → 2Cr3+(ag) + 7H2O(1). The oxidation number of chromium changes from

2002

When alkynes are hydrogenated completely they produce compounds with the general molecular formula

2002

Which of the following compounds can be represented by the molecular formula C2H6O?

2002

Which of the following processes takes place during the production of margarine from vegetable oils?

2002

When concentrated sodium chloride solution is electrolysed using inert electrodes, the products are

2002

If two metallic ions of the same concentration migrate to a graphite cathode, the one that would be preferentially discharged is the one that has the

2002

Which of the following statements about soapless detergents is correct? They

2002

The reaction between ethene and chlorine to form 1, 2-dichloroethane is

2002

The following compounds are hydrocarbons except

2002

One of the methods used for combating air pollution is

2002

The reaction of sucrose with dilute HCI produces

1 2