Volumetric and quantitative analysis

Which cation gives a green precipitate with NaOH?

• Fe⁺²

• Al⁺³

• Ca⁺²

• Cu⁺²

• Fe⁺³

Which cation gives a brick red precipitate with NaOH?

• Fe⁺²

• Al⁺³

• Ca⁺²

• Cu⁺²

• Fe⁺³

Which cation gives an bright yellow precipitate with KI?

• Ca⁺²

• Al⁺³

• Zn⁺²

• Na⁺¹

• Pb⁺²

A pale green solution X gives a green precipitate with excess aqueous sodium hydroxide. An alkaline gas is only given off when the mixture is warmed with aluminium powder. What ions foes X contain?

• Ammonium and copper(II)

• Ammonium and iron(II)

• Nitrate and copper(II)

• Iron(II) and nitrate

Which ion, in aqueous solution, forms a white precipitate when dilute sulfuric acid is added?

• Ag+

• Ba2+

• Cu2+

• Fe2+

Which gas changes damp litmus paper from red to blue?

• Ammonia

• Carbon dioxide

• Chlorine

• Hydrogen

What gas is formed when ammonium chloride is warmed with aqueous sodium hydroxide?

• Ammonia

• Chlorine

• Oxygen

• Hydrogen

Which of the following procedures can be used to identify ammonia gas?

• Passing the gas through lime water

• Placing a burning splint in a jar of the gas

• Placing a glowing splint in a jar of the gas

• Placing red and blue litmus paper in a jar of the gas

acid + base ₋>

• salt + hydrogen
• salt + water
• salt + carbon dioxide + water
• salt

HCl + NaOH → 

• NaH + ClOH
• NaCl + H₂
• NaCl + H₂O
• NaCl + Cl₂