Quimica

Multiple Choice

Which row describes a chemical change?

• A

• B

• C

• D

Multiple Choice

What describes a solvent?

• a solid that dissolves in a liquid

• the amount of solid that dissolves in a liquid

• the liquid in which a solid dissolves

• the mixture formed when a solid dissolves in a liquid

Multiple Choice

Which groups of the Periodic Table form compounds containing covalent bonds?

• Group I and Group 0

• Group I and Group VII

• Group V and Group 0

• Group V and Group VII

Multiple Choice

What is the chemical formula of nitric acid?

• HNO3
• H2O
• CO2
• NaCl

Multiple Choice

Which type of substance undergoes electrolysis?

• molten covalent compounds

• solid ionic compounds

• gaseous covalent compounds

• aqueous solutions of ionic compounds

Multiple Choice

Which row shows what happens during an endothermic reaction?

• A

• B

• C

• D

Multiple Choice

Carbon reacts with carbon dioxide at high temperatures.

carbon + carbon dioxide -> carbon monoxide

Which statement about the reaction is correct?

• Both carbon and carbon dioxide are oxidised.

• Both carbon and carbon dioxide are reduced.

• The carbon is oxidised and the carbon dioxide is reduced.

• The carbon is reduced and the carbon dioxide is oxidised.

Multiple Choice

Three powders are added to dilute sulfuric acid, as shown.

Which powders react to produce water?

• A

• B

• C

• D

Multiple Choice

The results of two tests on substance Q are shown.

Which cation is present in Q and what is gas R?

• Q: iron(II)

  R: carbon dioxide

• Q: iron(II)

  R: chlorine

• Q: iron(III)

  R: carbon dioxide

• Q: iron(III)

  R: chlorine

Multiple Choice

Which row describes a transition element?

• A

• B

• C

• D

Multiple Choice

Which substance does not react with chlorine?

• H2

• Kr

• Li

• NaBr

Multiple Choice

Which statement about a chemical test for water is correct?

• Anhydrous cobalt(II) chloride turns blue.

• Anhydrous cobalt(II) chloride turns white.

• Anhydrous copper(II) sulfate turns blue.

• Anhydrous copper(II) sulfate turns white.

Multiple Choice

Methane, ethane and propane are all alkanes. Their formulae are shown.

methane, CH4

ethane, C2H6

propane, C3H8

Which statement is not correct?

• All three compounds are hydrocarbons.

• All three compounds burn.

• Methane is the main constituent of natural gas.

• Propane burns completely to form carbon dioxide and hydrogen.