7f: Chemical Reactions

We can detect carbon dioxide using
1. lime water
2. a flame
3. a glowing splint
4. universal indicator
We can detect hydrogen using
1. a flame
2. a glowing splint
3. limewater
4. universal indicator
When we heat copper carbonate, we get
1. carbon dioxide given off
2. hydrogen given off
3. oxygen given off
4. an explosion
Magnesium + hydrochloric acid -->
1. magnesium chloride + hydrogen (gas)
2. magnesium hydride + chlorine (gas)
3. carbon dioxide
4. an alkali
Which gas is given off when carbonates react with acids?
1. carbon dioxide
2. hydrogen
3. oxygen
4. chlorine
Burning sulphur gives off
1. sulphur dioxide
2. hydrochloric acid
3. sulphur oxide
4. carbon dioxide
Burning hydrogen gas produces
1. water
2. oxygen
3. carbon dioxide
4. nitrogen
We test for water using
1. cobalt chloride paper (turns pink)
2. cobalt chloride paper (turns blue)
3. anhydrous copper sulphate (turns white)
4. litmus (turns blue)
The word equation for fuel burning is
1. fuel + oxygen --> carbon dioxide + water + energy
2. fuel + oxygen + energy --> carbon dioxide + water
3. fuel + carbon dioxide --> oxygen + energy
4. fuel + oxygen --> carbon dioxide + energy
When metals react with acids, we get
1. hydrogen given off
2. carbon dioxide given off
3. oxygen given off
4. a precipitate
synthetic materials
1. are materials that we have made
2. are materials that we get from plants
3. are materials that we get from animals
4. are materials extracted from rocks
in a chemical reaction
1. new substances are made
2. new substances are not made
3. there is always a colour change
4. a gas is always given off
in a physical change
1. new substances are not made
2. new substances are made
3. there is always a colour change
4. a gas is always given off
when carbonates (e.g. limestone) react with acids, we get
1. carbon dioxide given off
2. hydrogen given off
3. oxygen given off
4. no gas given off
limestone is
1. calcium carbonate
2. calcium oxide
3. magnesium carbonate
4. calcium chloride
The "fizz" in fizzy drinks is
1. carbon dioxide
2. carbon monoxide
3. oxygen
4. hydrogen
a flame in carbon dioxide will
1. go out
2. burn brighter
3. burn normally
4. make the gas explode with a squeaky pop
combustion means
1. burning
2. rusting
3. adding carbon dioxide
4. adding acid
candle wax contains
1. carbon and hydrogen
2. carbon and oxygen
3. hydrogen and oxygen
4. carbon and nitrogen
magnesium + oxygen -->
1. magnesium oxide
2. carbon dioxide
3. magnesium chloride
4. carbon monoxide
sulphur + oxygen -->
1. sulphur dioxide
2. carbon dioxide
3. sodium chloride
4. carbon monoxide
combustion is an example of
1. an oxidation reaction
2. a reduction reaction
3. a photosynthesis reaction
4. a neutralisation reaction
oxygen was discovered by
1. Joseph Priestly
2. Robert Boyle
3. Antoine Lavoisier
4. the Ancient Greeks
We test for oxygen using
1. a glowing splint
2. a burning splint
3. lime water
4. anhydrous copper sulphate
A chilled fizzy drinks can is less likely to make a mess when opened
1. because gases dissolve better in cold liquids
2. because gases dissolve better in warm liquids
3. because the gas has larger bubbles
4. because the gas has smaller bubbles
copper + ??? --> copper oxide
1. oxygen
2. nitrogen
3. carbon dioxide
4. hydrogen
??? + oxygen --> carbon dioxide
1. carbon
2. copper
3. hydrogen
4. nitrogen
coal is
1. a non-renewable fuel
2. a renewable fuel
3. a non-polluting fuel
4. formed from the remains of prehistoric animals
zinc + sulphuric acid -->
1. hydrogen gas + zinc sulphate
2. hydrogen gas + zinc chloride
3. carbon dioxide gas + zinc sulphate
4. carbon dioxide gas + zinc chloride
zinc + hydrochloric acid -->
1. hydrogen gas + zinc chloride
2. hydrogen gas + zinc sulphate
3. carbon dioxide gas + zinc chloride
4. carbon dioxide gas + zinc sulphate