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Chemical Changes

Authored by Maria Jose

Chemistry

10th - 12th Grade

Used 3+ times

Chemical Changes
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10 questions

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1.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

What are the products of the reaction of zinc with hydrochloric acid?

Zinc hydrochloride and hydrogen

Zinc chloride and water

Zinc hydrochloride and hydrogen

Zinc chloride and hydrogen

2.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Which substance is oxidised in the reaction represented by the ionic equation below?

Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)

Zinc because it loses electrons

Copper because it gains electrons

Zinc because it gains electrons

Copper because it loses electrons

3.

FILL IN THE BLANK QUESTION

20 sec • 1 pt

If a solution has a pH of 8, it is ______. Some vinegar has a pH of 4, so the vinegar is acidic.

4.

FILL IN THE BLANK QUESTION

1 min • 1 pt

In the electrolysis of molten lead bromide, the substance produced at the cathode is ______.

5.

OPEN ENDED QUESTION

1 min • Ungraded

Sulfuric acid is a strong acid. What is meant by a strong acid?

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6.

OPEN ENDED QUESTION

1 min • Ungraded

Aluminium is extracted from aluminium oxide by electrolysis.

In the electrolysis cell, there is a mixture of aluminium oxide and molten cryolite. Explain why.

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7.

DRAW QUESTION

3 mins • Ungraded

Draw a neat diagram of electrolytic cell used in the purification of copper and label the following: a) Anode b) Cathode

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