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Chemistry Past Questions and Answers

Waec Chemistry Questions

Question 1501:

A solution of pH 7 is

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A Acidic
B Neutral
C Concentrated
D Dilute
E Saturated

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Question 1502:

Which of the following equations represents a neutralization reaction?

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A CaCI₂ + 2HCI â†’CI₂ +CaCI ₂ + H₂O
B Na₂O₂ + H₂SO₄ → Na₂SO₄ + H₂O₂
C H₂SO₄ + KOH â†’ KHSO₄ + H₂ O
D 2Na + 2H₂O â†’ 2NaOH + H₂
E CuSO₄ + 2NaOH â†’ Cu(OH)₂+ Na₂SO₄

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Question 1503:

Amphoteric oxides are oxides which

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A React with water to form acids
B React with water to form alkali
C Show neither acid nor basic properties
D React with acids alkalis
E Contain high proportion of oxygen

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Question 1504:

The following acids are monobasic except

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A Trioxonitrate (V) acid
B Hydrochloric
C Ethanoic acid
D Tetraoxophosphorus (V) acid
E Dioxonitrate (lll) acid

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Question 1505:

An arrangement of two different metals in aqueous solutions of their salts to produce an electronic current is known as

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A Electrochemical cell
B Activity series
C Thermocouple
D Voltameter
E Galvanometer

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