GCSE Chemistry - Predicting and Identifying Reactions and Products - 1 - Exam Style Questions with Answers

Created on February 16, 2023 By

paruppts12

GCSE_OCR_CHE_4_PRODUCT_1

1 / 10

All of the above

reagent that runs out (first)

reactant that determines the volume of hydrogen given off

substance that causes the reaction to stop

reactant not in excess / that is all used up (at the end of the reaction

2 / 10

Hydrochloric acid is a strong acid.
Ethanoic acid is a weak acid.
Both acids contain hydrogen ions, H+
Both reactions make the same volume of hydrogen.
Explain why.

both contain the same amount of magnesium

both contain the same number of moles of magnesium

magnesium is the limiting reagent not same number of moles of acid

Both B and C

3 / 10

A student carried out a displacement reaction using an unknown halogen and a salt containing a halide ion.
As the reaction progressed they observed the formation of a dark brown solution.
Which halogen and salt did the students react together?

Potassium bromide + chlorine

Potassium chloride + iodine

Potassium iodide +bromine

Potassium chloride+ bromine

4 / 10

Which statement about noble gases is not correct?

They are unreactive

They have low densities

They are diatomic

Their boiling points increase going down the group

5 / 10

74

32

68

43

6 / 10

When sodium reacts with water an alkaline solution is formed.
Which statement about why this happens it true?

Hydrogen gas is made

It contains an ionic compound

It contains water

It contains hydroxide ions

7 / 10

D

B

A

C

8 / 10

A student was investigating the reactivity of different metals in hydrochloric acid.
Which statement about the results is true?

Calcium is more reactive than magnesium because its outer electrons are less easily lost

Magnesium is more reactive than zinc because it more readily forms negative ions

Copper does not react because it is less reactive than hydrogen

Zinc reacts with the HCl to form zinc hydroxide and hydrogen gas

9 / 10

This question is about substances that are found in different types of water.
River water contains dissolved substances.
River water has to be purified before it can be drunk.
The water purification process has three stages.
These are
• filtration
• sedimentatio
• chlo ination.
Pollutants such as fertilisers are still in the water after this purification.
Explain why

They are not dissolved

They are not soluble

do not remove dissolved or soluble substances

Remove dissolved or soluble substance

10 / 10

Most metals have high melting points.
Look at the graph. It shows the melting points of some metals.
Write the symbol of the metal which has the weakest metallic bonds.

Ti

Ca

K

Sc

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