Chemistry
Answer
(a) Electronaffinity — The amount of energy released while converting a neutral gaseous isolated atom into a negatively charged gaseous ion (anion) by the addition of electron is called Electron Affinity (E.A.)
(b) Electronegativity — The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is called its electronegativity.
Related Questions
Give one relevant observation for each of the following reactions.
(a) Zinc carbonate is heated.
(b) Excess of ammonia is passed through an aqueous solution of lead nitrate.
(c) Sodium hydrogen carbonate is added to nitric acid.
The equation,
4NH3 + 5O2 ⟶ 4NO + 6H2O
represents the catalytic oxidation of ammonia. If 100 cm3 of ammonia is used, calculate the volume of oxygen required to oxidise the ammonia completely.
X [2, 6] and Y [2, 8, 8, 1] are two elements.
Using this information complete the following:
(a) …………… is the metallic element.
(b) Ionisation energy of X is …………… than Y.
(c) …………… is the reducing agent.
Choose the correct word which refers to the process of electrolysis from A to C, to match the description 1 to 3.
A : Oxidation B : Cathode C : An electrolyte
(1) Conducts electricity in aqueous or in molten state.
(2) Loss of electron takes place at anode.
(3) A reducing electrode