S4 WA1 revision (Periodic table, Reactivity series, QA, redox)

Few drops of sodium hydroxide solution is added to a solution containing zinc cations.

Give the chemical name of the precipitate.

(a)  

Magnesium strip dipped into copper(II) nitrate solution. A chemical change occured.

Choose all that are correct.

• Mg became Mg²⁺

• Cu became Cu²⁺

• Mg²⁺ became Mg

• Cu²⁺ became Cu

Aqueous bromine is mixed with aqueous sodium chloride. Mixture turns brown because

• bromine has displaced chlorine during the chemical reaction

• chlorine has displaced bromine during the chemical reaction

• bromine has displaced sodium during the chemical reaction

• bromine is brown and there is no chemical reaction

Which type of reaction is used to test for presence of sulfur dioxide gas?

(a)  

This precipitate dissolves in excess sodium hydroxide, but not excess aqueous ammonia.

• aluminium hydroxide
• zinc hydroxide

• copper(II) hydroxide

• calcium hydroxide

Choose all that applies.

Down Group 17,

• atomic size increases

• colour lightens

• melting and boiling point increases

• density increases

X oxide can react with both hydrochloric acid and sodium hydroxide.

X oxide is insoluble in water.

X oxide is yellow when hot, white when cold.

A grey solid is formed when X oxide is heated with carbon.

X is

• calcium

• magnesium

• zinc

• lead

Metals high up the reactivity series can only be extracted from their ores using

(a)  

Choose all that are formed at the end of the reaction when silver carbonate is heated.

• silver

• water

• oxygen

• carbon dioxide

The oxidation state of phosphorus in H₃PO₄ is

• 0

• +3

• +5

• +8

• -4