Fill in the blank by choosing the correct answer: During electrolysis, the compound ............... in its molten state liberates reddish brown fumes at the anode. [NaCl / PbBr2] [1]

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.

Match the Column A with Column B: [5]Column AColumn B(a) Sodium chloride1. has two shared pair of electrons(b) Methane2. has high melting and boiling points(c) Hydrogen chloride gas3. a greenhouse gas(d) Oxidation reaction4. has low melting and boiling points(e) Water5. Zn − 2e− ⟶ Zn2+6. S + 2e− ⟶ S2−

Which of the following reactions takes place at the anode during the electroplating of an article with silver? [1]Ag − 1e− ⟶ Ag1+Ag + 1e− ⟶ Ag1−Ag − 1e− ⟶ AgNone of the above

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

Fill in the blank with the correct choice:Higher the pH value of a solution, the more ............... [acidic / alkaline] it is. [1]

Non-polar covalent compounds are ............... [good / bad] conductors of heat and electricity. [1]

Fill in the blank with the correct choice:............... [Silver chloride / Lead chloride] is a white precipitate that is soluble in excess of Ammonium hydroxide solution. [1]

Fill in the blank with the correct choice:Conversion of ethene to ethane is an example of ............... [hydration / hydrogenation] [1]

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

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.

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?