Heating aluminium carbonate relesase ........... gas

• Oxygen

• carbon dioxide

• Nitrogen

Heating lead (II) nitrate will produce ............ , ............... and oxygen

• lead (II) carbonate, carbon dioxide

• lead (II) oxide, nitrogen

• lead (II) oxide, nitrogen dioxide

• lead (II) oxide, nitrogen monoxide

The colour of copper (II) oxide is.....

• white

• black

• green

• brown

..................... is yellow when hot, white when cold

• lead (II) oxide

• zinc oxide

• potassium oxide

• copper (II) oxide

When adding sodium hydroxide solution, a white precipitate is formed which insoluble in excess. The possible ions are....

• calcium, magnesium

• calcium, aluminium

• zinc, magnesium

• aluminium, zinc

Blue precipitate insoluble in excess of sodium hydroxide solution, the possible ion present is.......

• iron (II)

• iron (III)

• copper (II)

• lead (II)

Brown precipitate that insoluble in excess in ammonia solution. The possible ion is......

• copper (II)

• iron (II)

• iron (III)

• lead (II)

No precipitate formed when ammmonia solution is added and the possible ion present is.....

• lead (II) ion

• calcium ion

• aluminium ion

• zinc ion

solid state - green colour

aqueous solution - blue

The salt is ..........

• copper (II) oxide

• copper (II) sulphate

• copper (II) chloride

• iron (II) chloride

Zinc nitrate is ............. in excess of sodium hydroxide.

• soluble

• insoluble