Metals are good ............... [oxidizing agents / reducing agents] [1]

State the terms/process for the following: [5]The energy released when an atom in the gaseous state accepts an electron to form an anion.Tendency of an element to form chains of identical atoms.The name of the process by which Ammonia is manufactured on a large scale.A type of salt formed by partial replacement of hydroxyl radicals with an acid radical.The ratio of the mass of a certain volume of gas to the same volume of hydrogen measured under the same conditions of temperature and pressure.

The following sketch illustrates the process of conversion of Alumina to Aluminium: [5]Study the diagram and answer the following:Name the constituent of the electrolyte mixture which has a divalent metal in it.Name the powdered substance ‘X’ sprinkled on the surface of the electrolyte mixture.What is the name of the process?Write the reactions taking place at the electrodes ‘Y’ (anode) and ‘Z’ (cathode) respectively.

Identify the alloy in each case from the given composition: [2](a) Aluminium, magnesium, manganese, copper(b) Iron, nickel, chromium, carbon

Write one use of the following alloys: [2](a) Bronze(b) Fuse metal

An element with the largest atomic radius among the following is: [1] Carbon Nitrogen Lithium Beryllium

The compound that is not an ore of aluminium: [1] Cryolite Corundum Fluorspar Bauxite

An element in period 3, whose electron affinity is zero: [1] Neon Sulphur Sodium Argon

Complete and balance the following equations: [3] (a) NH4Cl + Ca(OH)2 → (b) CuSO4 + NH4OH → (c) Cu + Conc. HNO3 →

The following questions are pertaining to the laboratory preparation of Ammonia gas from Magnesium nitride: [3](a) Write a balanced chemical equation for its preparation.(b) Why is this method seldom used?(c) How do you identify the gas formed?

Ethane burns in oxygen according to the chemical equation:2C2H6 + 7O2 → 4CO2 + 6H2OIf 80 ml of ethane is burnt in 300 ml of oxygen, find the composition of the resultant gaseous mixture when measured at room temperature. [3]

State a relevant reason for the following: [2](a) Hydrogen chloride gas cannot be dried over quick lime.(b) Ammonia gas is not collected over water.