1991 WAEC SSCE Chemistry Past Questions

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1991

CH2 = CH2 + H2SO4 → CH3 - CH2 -OSO3H. The reaction illustrated by the equation above is an example of

1991

Which of the following elements can from more than one acidic oxide?

1991

Which of the processes represented by the following equations has the greatest positive entropy change?

1991

What is the amount (in mole) of sodium trioxocarbonate (IV) in 5.3 g of the compound? (Na2CO3 = 106)

1991

When air is passed through a heated tube containing finely divided copper, the component that is absorbed in the process is

1991

Which of the following statements is not correct? Group 7 elements

1991

Which of the following modes of motion is exhibited by the particles of a solid?

1991

The products of the electrolysis of dilute sodium chlorid solution with platinum electrodes are

1991

Which of the following formula is that of a dicarboxylic acid?

1991

Brass is an alloy of copper and

1991

2NaNO3 → 2NaNO2 + O2. From the equation above, what is the volume of oxygen produced at s.t.p. when 8.5g of 2NaNO3 is heated until no further gas is evolved? (2NaNO3 = 85, molar volume of gases at s.t.p. = 22.4dm3)

1991

Consider the reaction represented by the equation below: H2(g) + I2(s) ⇌ 2HI(g) ΔH negative. Which of the following takes place when the temperature of the reaction vessel is decreased?

1991

CH4(g) + 2O2(g) → 2H2O(l) + CO2(g) ∆H = 890KJ mo-1 ∆H in the reaction represented by the equation above is the enthalpy of

1991

A compound which liberates carbon (IV) oxide from a hydrogentrioxocarbonate (lV) could have the molecular formula

1991

In which of the following are the substances arranged in their correct order of increasing melting point?

1991

Which of the reactions represented by the following equations will take place at room temperature?

1991

When starch undergoes complete enzyme-catalyzed hydrolysis, the resulting product is

1991

In the redox reaction represented by the following equation: Cu2+aq + Zn(s) → Cu(s) + Zn2+

1991

The ratio of reactants to products is 1: 3: 2 in the reaction represented by the equation below: N2,/SUB>(g) → 2NH3(g) which of the following law is demonstrated by this?

1991

Esterification of propane 1,2,3-triol and unsaturated higher carboxylic acids will produce

1 2 3

1991 WAEC SSCE Chemistry Past Questions

CH2 = CH2 + H2SO4 → CH3 - CH2 -OSO3H. The reaction illustrated by the equation above is an example of

Which of the following elements can from more than one acidic oxide?

Which of the processes represented by the following equations has the greatest positive entropy change?

What is the amount (in mole) of sodium trioxocarbonate (IV) in 5.3 g of the compound? (Na2CO3 = 106)

When air is passed through a heated tube containing finely divided copper, the component that is absorbed in the process is

Which of the following statements is not correct? Group 7 elements

Which of the following modes of motion is exhibited by the particles of a solid?

The products of the electrolysis of dilute sodium chlorid solution with platinum electrodes are

Which of the following formula is that of a dicarboxylic acid?

Brass is an alloy of copper and

2NaNO3 → 2NaNO2 + O2. From the equation above, what is the volume of oxygen produced at s.t.p. when 8.5g of 2NaNO3 is heated until no further gas is evolved? (2NaNO3 = 85, molar volume of gases at s.t.p. = 22.4dm3)

Consider the reaction represented by the equation below: H2(g) + I2(s) ⇌ 2HI(g) ΔH negative. Which of the following takes place when the temperature of the reaction vessel is decreased?

CH4(g) + 2O2(g) → 2H2O(l) + CO2(g) ∆H = 890KJ mo-1 ∆H in the reaction represented by the equation above is the enthalpy of

A compound which liberates carbon (IV) oxide from a hydrogentrioxocarbonate (lV) could have the molecular formula

In which of the following are the substances arranged in their correct order of increasing melting point?

Which of the reactions represented by the following equations will take place at room temperature?

When starch undergoes complete enzyme-catalyzed hydrolysis, the resulting product is

In the redox reaction represented by the following equation: Cu2+aq + Zn(s) → Cu(s) + Zn2+

The ratio of reactants to products is 1: 3: 2 in the reaction represented by the equation below: N2,/SUB&gt;(g) → 2NH3(g) which of the following law is demonstrated by this?

Esterification of propane 1,2,3-triol and unsaturated higher carboxylic acids will produce

The ratio of reactants to products is 1: 3: 2 in the reaction represented by the equation below: N2,/SUB>(g) → 2NH3(g) which of the following law is demonstrated by this?