Chemistry
Answer
(a) A Mole is the amount of pure substance containing the same number of chemical units as there are atoms in exactly 12 grams of carbon-12.
(b) Gay-Lussac's Law of combining volumes — When gases react, they do so in volumes which bear a simple ratio to one another, and to the volume of the gaseous product, provided that all the volumes are measured at the same temperature and pressure.
Related Questions
Give balanced chemical equations to prepare the following salts:
(a) Sodium sulphate using dilute sulphuric acid.
(b) Copper chloride using copper carbonate.
(c) Ferric chloride using iron.
Give one equation each to show the following properties of sulphuric acid:
(i) Dehydrating property
(ii) Acidic nature
(iii) As a non-volatile acid
Name the product formed in the following:
(a) Catalytic hydrogenation of ethyne.
(b) Reaction of sodium with ethanol.
Give a chemical test to distinguish between the following pairs of compounds:
(a) Sodium chloride solution and sodium nitrate solution.
(b) Hydrogen chloride gas and hydrogen sulphide gas.
(c) Ethene gas and ethyne gas.