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JAMB 2012 Chemistry Practice Test | UTME Questions & Answers

Creado por: juanbacan
Practice JAMB-style 2012 Chemistry questions with instant scoring and clear explanations. Prepare for UTME and boost your score today.Sin descripción disponible.
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Question 21

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

A)

crystalline form

B)

melting point

C)

reactivity with dilute acids

D)

solubility in water

How to solve?

Question 22

The oxidation number of boron in NaBH4 is

A)

−3

B)

−1

C)

+1

D)

+3

How to solve?

Question 23

2Na2O2(s) + 2H2O2(I) → 4NaOH(s) + O2(s). Which substance is oxidized?

A)

2NaO2(s)

B)

NaOH(aq)

C)

H2O(l)

D)

O2(g)

How to solve?

Question 24

What number of moles of Cu2+ will be deposited by 360 coulombs of electricity? [F = 96500 C mol−1]

A)

5.36 × 10−4 mol

B)

1.87 × 10−3 mol

C)

9.35 × 10−4 mol

D)

3.73 × 10−3 mol

How to solve?

Question 25

A metal M displaces zinc from ZnCl, solution. This shows that

A)

electrons flow from zinc to M

B)

M is more electropositive than zinc

C)

M is more electronegative than zinc

D)

zinc is more electropositive than M

How to solve?

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