CHEMICALS

Name the compound NH₃

• washing soda

• ammonia

• bicarbonate of soda

• lime stone

What is the chemical formula for water?

• O₂

• H₂O

• CO₂

• NaCl

Which gas is commonly known as laughing gas?

• Oxygen

• Carbon Dioxide

• Hydrogen

• Nitrous Oxide

What is the pH level of pure water at 25°C?

• 10

• 14

• 7

• 0

What is the chemical formula for table salt?

• CaCO₃

• MgO

• NaCl

• KCl

Which element has the atomic number 1?

• Lithium

• Hydrogen

• Oxygen

• Helium

What is the main gas found in the Earth's atmosphere?

• Argon

• Carbon Dioxide

• Nitrogen

• Oxygen

an acid and a metal carbonate gives

• carbon dioxide and water

• a salt, CO₂ & H₂O

• a salt only

• a bright flame

moist red litmus turns blue when ...

• allowed to dry in the sun

• placed in lemon juice

• a non-metal reacts with oxygen

• a metal reacts with oxygen

Three strong acids are ...

• HCl

  nitric acid

  H₂SO₄

• ammonia

  vinegar

  hydrochloric acid

• lemon juice

  H₂SO₄

  HNO₃

• sodium hydroxide

  calcium carbonate

  sulfuric acid