1992 WAEC SSCE Chemistry Past Questions

1992

If the volume of a given mass of gas at 298 K and pressure of 205.2 x 103 Nm-2 is 2.12dm3, what is volume of the gas at s.t.p? (Standard pressure = 101.3 x 103 Nm-2, Standard temperature = 273K)

1992

Which of the following processes is a physical reaction?

1992

Study carefully the reaction represented by the equation below. 2H2O 2(l) → O 2(g) + 2H2O(l). Which of the following will not reaction increase the reaction rate?

1992

''The rate a reaction is proportional to the number of effective collisions occurring per second between the reactants''. This statement is associated with the

1992

What is the quantity of electricity produced when a current of 0.5A is passed for 5 hours 45 mins? (1F = 96500C)

1992

The scum formed when soap is mixed with hard water could be

1992

The halide used widely in photography is

1992

When air is passed through potash and then pyrogallol, the components are noble gases,

1992

Which of the following involves the decomposition enzymic action?

1992

Consider the compounds represented by the following general formula: X2SO4 Y2(SO4)3, 24H2OX and Y could respectively be

1992

When iron rusts, it undergoes

1992

What is the change in the oxidation number of phosphorus in the reaction represented by the following equation? 4P (s) + 5O(2)(g) → 2P2O5(g)

1992

What is the following compounds will not decompose when heated strongly ?

1992

What is the number of oxygen atoms in 32g of the gas? (O = 16, L = 6.0 X 10,23 mol-1)

1992

The formula (CH3),3 COH is that of a

1992

Which of the following gases will have the highest rate of diffusion under the same conditions? (H = 1, C =12, O = 16, S = 32, CI = 35.5)

1992

When sucrose is warmed with Fehling's solution

1992

The following salts are readily soluble in water except

1992

1992 WAEC SSCE Chemistry Past Questions

If the volume of a given mass of gas at 298 K and pressure of 205.2 x 103 Nm-2 is 2.12dm3, what is volume of the gas at s.t.p? (Standard pressure = 101.3 x 103 Nm-2, Standard temperature = 273K)

Which of the following processes is a physical reaction?

Study carefully the reaction represented by the equation below. 2H2O 2(l) → O 2(g) + 2H2O(l). Which of the following will not reaction increase the reaction rate?

''The rate a reaction is proportional to the number of effective collisions occurring per second between the reactants''. This statement is associated with the

What is the quantity of electricity produced when a current of 0.5A is passed for 5 hours 45 mins? (1F = 96500C)

The scum formed when soap is mixed with hard water could be

The halide used widely in photography is

When air is passed through potash and then pyrogallol, the components are noble gases,

Which of the following involves the decomposition enzymic action?

Consider the compounds represented by the following general formula: X2SO4 Y2(SO4)3, 24H2OX and Y could respectively be

When iron rusts, it undergoes

What is the change in the oxidation number of phosphorus in the reaction represented by the following equation? 4P (s) + 5O(2)(g) → 2P2O5(g)

What is the following compounds will not decompose when heated strongly ?

What is the number of oxygen atoms in 32g of the gas? (O = 16, L = 6.0 X 10,23 mol-1)

The formula (CH3),3 COH is that of a

Which of the following gases will have the highest rate of diffusion under the same conditions? (H = 1, C =12, O = 16, S = 32, CI = 35.5)

When sucrose is warmed with Fehling's solution

The following salts are readily soluble in water except

If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information?

Vulcanization of rubber