Identify the cation in each of the following cases: [2](a) Ammonium hydroxide solution when added to Solution B gives a white precipitate which does not dissolve in excess of ammonium hydroxide solution.(b) Sodium hydroxide solution when added to Solution C gives a white precipitate which is insoluble in excess of sodium hydroxide solution.

The metallic hydroxide which forms a deep inky blue solution with excess ammonium hydroxide solution is: [1]Fe(OH)2Cu(OH)2Ca(OH)2Fe(OH)3

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

The ion which could be discharged most readily during electrolysis is ............... [Fe2+ / Cu2+] [1]

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

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]

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

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]