SALT FORM 4

This salt is white precipitate in little NaOH and soluble in excess of NaOH. What are the cations?

• Calcium ion

• Magnesium ion

• Ferum ion

• Aluminium ion / Zn ion/ Pb ion

The cation of this salt in excess of NaOH & in excess of ammonia is not soluble and white in color. What is the cation?

• Mg ion

• Ca ion

• Pb ion

• Al ion

Salt Z when heated is yellow and white when cool down. It produced colourless gas and a pungent smell gas. What is salt Z?

• Plumbum nitrate

• Zinc Nitrate

• Magnesium sulphate

• Calcium chloride

How to distinguish between Calcium ion and Magnesium ion?

• Calcium ion is white while magnesium ion is black

• Calcium ion soluble in excess NaOH while Magnesium ion is insoluble

• Calcium ion is soluble in little ammonia while Magnesium ion is insoluble

• Calcium ion is producing gas while magnesium ion not

What are the reagent used to confirm chloride ions?

• Nitric acid and silver nitrate

• Sulphuric acid and ferum sulphate

• Hydrochloric acid and Barium chloride

• Nessler reagent

Which of the following ions will produce brown ring in a confirmatory test?

• Aluminium ion

• Plumblum ion

• Chloride ion

• Nitrate ion

What is the gas that can turn the orange colour of Potassium dichromate into green?

• Nitrogen dioxide

• Hydrogen gas

• Hydrogen chloride

• Sulphur dioxide

This gas turns blue litmus paper to red and decolorise it. What is the gas?

• Oxygen gas

• Chlorine gas

• Ammonia gas

• Hydrogen chloride gas

Salt Y is brown when hot and yellow when cold and turns lime water to cloudy. What is the possible of Salt Y?

• Magnesium carbonate

• Plumblum carbonate

• Zinc carbonate

• Plumblum iodide

Which of the following is insoluble salt?

• Zinc nitrate

• Magnesium chloride

• Barium sulphate

• Sodium carbonate