Year 10 Metals & Acids

The chemical formula for hydrochloric acid is...

• HCl

• H₂O

• HNO₃

• NaCl

The chemical formula for magnesium chloride is....

• MgO

• MgCl₂

• NaCl

• MnCl₂

The positive test result for oxygen gas, O₂ is

• a lit splint; gas burns with a squeaky pop

• a glowing splint; the splint relights

• it turns lime water milky / cloudy

• it puts out a burning splint

The positive test result for carbon dioxide gas, CO₂ is

• a lit splint; gas burns with a squeaky pop

• a glowing splint; the splint relights

• it turns lime water milky / cloudy

• none of these

The positive test result for hydrogen gas, H₂ is

• a lit splint; gas burns with a squeaky pop

• a glowing splint; the splint relights

• it turns lime water milky / cloudy

• none of these

The positive test result for hydrogen gas, H₂ is

• a lit splint; gas burns with a squeaky pop

• a glowing splint; the splint relights

• it turns lime water milky / cloudy

• none of these

A gas that is much lighter (less dense) than air is....

• carbon dioxide

• hydrogen

• oxygen

• nitrogen

A gas that is much heavier (more dense) than air is....

• carbon dioxide

• hydrogen

• oxygen

• nitrogen

magnesium + hydrochloric acid → magnesium chloride + hydrogen

This is a / an....

• word equation

• symbol equation

• mathematical equation

• answer

magnesium + sulfuric acid → magnesium ________ + hydrogen

The missing word is

• chloride

• sulfur

• salt

• sulfate