CHEMISTRY -HEATING OF CARBONATE AND NITRATE

Which of the following steps is NOT part of qualitative analysis?

• Cation tests
• Heat tests
• Melting point test
• Solubility

Which of the following salts will produce a brown gas on heating?

• Lead(II) bromide
• Ammonium nitrate
• Potassium nitrate
• Zinc nitrate

WHICH OF THE FOLLOWING IS A SOLUBLE SALT

• SILVER CHLORIDE

• BARIUM SULPHATE

• POTASSIUM NITRATE

• COPPER(II) CARBONATE

SOLID Z WHEN HEATED WILL PRODUCE A SOLID THAT IS BROWN WHEN HOT YELLOW WHEN COLD. THE OXIDE OF Z PROBABLY IS

• MAGNESIUM OXIDE

• ZINC OXIDE

• COPPER(II) OXIDE

• LEAD(II) OXIDE

MAGNESIUM CARBONATE WHEN HEATED, WILL PRODUCE A COLOURLESS GAS THAT TURNS THE LIMEWATER CLOUDY. THE GAS IS

• OXYGEN

• HYDROGEN

• CARBON DIOXIDE

• CHLORINE

WHICH OF THE FOLLOWING WILL NOT DECOMPOSE WHEN HEATED?

• ZINC NITRATE

• MAGNESIUM NITRATE

• SODIUM CARBONATE

• LEAD(II) CARBONATE

HEATING OF COPPER CARBONATE PRODUCE A BLACK SOLID. THE BLACK SOLID IS

• COPPER

• COPPER(II) OXIDE

• COPPER(II) CARBONATE

• COPPER(II) NITRATE

MAGNESIUM NITRATE IS HEATED STRONGLY. IT DECOMPOSES TO PRODUCE A BROWN GAS. HOW DO WE TEST THE CONFIRM THE PRESENCE OF THIS GAS

• FLOW INTO LIME WATER

• PUT THE LIGHTED WOODEN SPLINTER

• PUT THE GLOWING WOODEN SPLINTER

• USE A DAMP BLUE LITMUS PAPER

THE BROWN GAS RELEASED IS

• OXYGEN

• CATBON DIOXIDE

• HYDROGEN

• NITROGEN DIOXIDE

WHEN THE BROWN GAS IS TESTED WITH BLUE LITMUS PAPER, IT CHANGES TO RED. THIS GAS SHOWS ___________ PROPERTY

• ACIDIC

• ALKALINE

• NEUTRAL