Analytical Chemistry — Chemistry STD 10 — Question

Hydrogen chloride gas is prepared in the laboratory using concentrated sulphuric acid and sodium chloride. Answer the questions that follow based on this reaction :
(i) Give the balanced chemical equation for the reaction with suitable condition(s) if any.
(ii) Why is concentrated sulphuric acid used instead of concentrated nitric acid?
(iii) How is the gas collected?

Show ionically why (i) phosphoric acid, (ii) sulphuric acid and (iii) acetic acid are called acids.

Give reason for the following:
The ratio of hydrogen and oxygen formed at the cathode and anode is 2: 1 by volume.

Copy and complete the following table

	Sodium	Phosphorous
Formula of chloride
Physical state of chloride at room temperature(i.e., Solid,Liquid or gas)
Nature of bonding in chloride

Calculate the number of gram atoms in 4.6 gram of sodium

Explain, why silver nitrate crystals are dissolved in distilled water and not in tap to prepare silver nitrate solution as a laboratory reagent.
Give one chemical test to distinguish between dilute hydrochloric acid and dilute sulphuric acid.

Compare:
sodium atom and sodium ion
(i) atomic structure
(ii) electrical state
(iii) chemical action
(iv) toxicity

Give four examples of preparation of acids by synthesis.

Give the names of any three alkyl radicals. How are they formed?

State the method of preparation of ethanol by hydrolysis of ethane.