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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 21:

What volume of 0.5 mol dm^-3 H₂SO₄ will exactly neutralize 20cm³ of 0.1 mol dm^-3 NaOH solution?

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A 2.0 cm³
B 5.0 cm³
C 6.8 cm³
D 8.3 cm³

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Question 22:

The oxidation state of chlorine in HClO₄ is

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A -5
B -1
C +1
D +7

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Question 23:

ZnO_(s) + CO_(g) â†’ Zn_(s) + CO_2(g)
In the reaction above, Zinc has been

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A Decomposed
B Displaced
C Oxidized
D Reduced

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Question 24:

Which of the following acts as both reducing and oxidized agent?

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A H₂
B SO₂
C H₂S
D CO₂

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Question 25:

In the electrolysis of brine, the anode is

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A Platinum
B Copper
C Zinc
D Carbon

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