Acids, Bases and Salts — Chemistry STD 10 — Question

Explain the terms empirical formula and molecular formula.

Using sodium hydroxide solution, how will you distinguish: Zinc nitrate solution from calcium nitrate solution

Why is sulphuric acid known as king of chemicals and oil vitriol ?

Ethanol can be oxidized to ethanoic acid. Write the equation and name the oxidizing agent.

Mention three important uses of nitric acid; Give the property of nitric acid involved in the use.

The following question is pertaining to the laboratory pertaining hydrogen chloride gas.
Write the equation for its preparation mentioning the condition required

In a chemistry lab, a student is given a solution containing an unknown cation. The student adds sodium hydroxide (NaOH) to the solution and observes the formation of a blue precipitate. The student then decides to add ammonium hydroxide to a fresh sample of the solution in excess.
(a) Identify the cation.
(b) What happens when excess of NaOH is added in the solution?
(c) What happens when excess of ammonium hydroxide is added to the solution?

Complete the table:

Name of Process	Inputs	Equation	Output
	Ammonia + Air		Nitric acid

Give the equation for the reduction of Copper oxide

Complete the table giving (i) ions present (ii) products at electrodes during electrolysis.

Substance	Ions present	Product at
		Cathode	Anode
Molten lead bromide
Copper sulphate solution using copper electrodes.