Qualitative Analysis

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

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

All of the following salts are soluble except...

• Lead(II) nitrate
• Sodium carbonate
• Magnesium chloride
• Barium sulphate

What does the colour of residue tell us about the salt?

• Type of cation
• Type of anion
• Solubility of salt

What does the gas/ gases collected tell us about the salt?

• Type of cation 
• Type of anion
• Reactivity with oxygen
• Volatility

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

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

A solution X when added into sodium carbonate solution turns limewater cloudy. which of the following is solution X?

• Aqueous ammonia solution
• Calcium hydroxide solution
• Vinegar
• Magnesium nitrate solution

When solid Y is heated strongly, a gas that turns limewater milky is produced, leaving a white residue. Which of the following could be solid Y?

• Zinc carbonate
• Potassium carbonate
• Lead(II) carbonate
• Magnesium carbonate

Which of the following is used to test for nitrate ions?

• Iron(II) sulphate solution, dilute sulphuric acid and concentrated sulphuric acid
• Hydrochloric acid and barium chloride solution
• Nitric acid and silver nitrate solution
• Sodium hydroxide solution

How can aluminium sulphate and zinc sulphate solution be differentiated?

• Addition of silver nitrate solution
• Addition of aqueous ammonia
• Addition of sodium hydroxide solution
• Addition of barium chloride solution

Solution M reacts with sodium hydroxide solution to form a white precipitate that is insoluble in excess sodium hydroxide solution. Which of the following ions is most likely present in solution M?

• Lead(II) ion
• Zinc ion
• Magnesium ion
• Ammonium ion