What is the general reaction for an acid reacting with a metal?

metal + acid ==> metal salt + hydrogen

What is the equation for the thermal decomposition of copper carbonate?

copper carbonate ==> copper oxide + carbon dioxide

Which statement about Group 1 metals is incorrect?

Reactivity decreases down the group.

What is the general reaction of Group 1 metals with water?

metal + water ==> metal hydroxide + hydrogen

Which statement is correct about metal and non-metal oxides?

Non-metal oxides are acidic, metal oxides are basic.

Which chemicals are used to produce carbon dioxide in the lab?

Calcium carbonate and hydrochloric acid.

Which chemicals are used to produce oxygen in the lab?

Hydrogen peroxide and manganese(IV) oxide.

Which statement about the halogens is incorrect?

Chlorine will displace iodide from sodium iodide.

Why do elements in the same group undergo similar reactions?

They have the same number of electrons in their outer shell.

What is a chemical test for the presence of water?

Anhydrous copper(II) sulfate: white ==> blue

What is a physical test for the purity of water?

Freezes at 0°C, boils at 100°C.

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IGCSE - Chemistry of the Elements - Dual

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IGCSE Chemistry of the Elements Quiz

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Questions 15

Answers

1
Which percentage for the amount of each gas in the air is incorrect?
Argon - 0.9%
Carbon dioxide - 0.4%
Oxygen - 21%
Nitrogen - 78%
2
What is the general reaction for an acid reacting with a metal?
metal + acid ==> metal salt + carbon dioxide
metal + acid ==> metal salt
metal + acid ==> metal salt + hydrogen
metal + acid ==> metal salt + oxygen
3
What is the equation for the thermal decomposition of copper carbonate?
copper carbonate ==> copper oxide + carbon dioxide
copper carbonate ==> copper oxide + carbon monoxide
copper carbonate ==> copper + carbon dioxide
copper carbonate + oxygen ==> copper oxide + carbon dioxide
4
Which statement about Group 1 metals is incorrect?
Reactivity decreases down the group.
Sodium melts into a ball when added to water.
Potassium burns with a lilac flame when added to water.
Lithium fizzes when added to water.
5
What is the general reaction of Group 1 metals with water?
metal + water ==> metal hydroxide + oxygen
metal + water ==> metal oxide + oxygen
metal + water ==> metal hydroxide + hydrogen
metal + water ==> metal oxide + hydrogen
6
Which statement is correct about metal and non-metal oxides?
Non-metal oxides are acidic, metal oxides are basic.
Metal and non-metal oxides are basic.
Metal and non-metal oxides are acidic.
Metal oxides are acidic, non-metal oxides are basic.
7
Which chemicals are used to produce carbon dioxide in the lab?
Calcium carbonate and sodium hydroxide
Calcium carbonate and hydrochloric acid.
Calcium sulfate and hydrochloric acid.
Calcium oxide and hydrochloric acid.
8
Which statement about the halogens is incorrect?
Fluorine is the most reactive.
Bromine is a dark red liquid.
Chlorine is a pale yellow gas.
Iodine is a dark grey solid.
9
Which chemicals are used to produce oxygen in the lab?
Water and magnesium.
Hydrogen peroxide and manganese(IV) oxide.
Hydrogen peroxide and magnesium oxide.
Water and manganese(IV) oxide.
10
Which statement about the halogens is incorrect?
Chlorine will displace bromine from sodium bromide.
Chlorine will displace iodide from sodium iodide.
Chlorine will displace iodine from sodium iodide.
Bromine will displace iodine from sodium iodide.
11
Why do elements in the same group undergo similar reactions?
They have the same number of electrons in their outer shell.
They have the same number of electrons.
They have the same number of protons.
They have different numbers of electrons.
12
What is a chemical test for the presence of water?
Anhydrous copper(II) sulfate: white ==> blue
Anhydrous copper(II) sulfate: white ==> pink
Hydrated copper(II) sulfate: white ==> blue
Hydrated copper(II) sulfate: blue ==> white
13
What is the general equation for a metal reacting with oxygen?
metal + oxygen ==> non-metal oxide
metal + oxygen ==> metalcide
metal + oxygen ==> metal nitride
metal + oxygen ==> metal oxide
14
What is a physical test for the purity of water?
Freezes at -1°C, boils at 100°C.
Freezes at 0°C, boils at 101°C.
Freezes at 100°C, boils at 0°C.
Freezes at 0°C, boils at 100°C.
15
Which group and period are the element phosphorus in?
Group 3, Period 5
Group 5, Period 3
Group 2, Period 5
Group 5, Period 2

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