(i) Identify the cation in each of the following cases:
(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

(ii) Fill in the blanks by choosing the correct answer from the brackets:
(a) During electrolysis, the compound________ in its molten state liberates reddish brown fumes at the anode. [NaCl/ PbBr₂]
(b)The ion which could be discharged most readily during electrolysis is___________ [Fe²⁺/Cu²⁺]

(iii) Arrange the following as per the instruction given in the brackets:
(a) Al, K, Mg, Ca (decreasing order of its reactivity)
(b) N, Be, O, C (increasing order of non-metallic character)
(c) P, Si, E , Be (decreasing order of valence electrons)


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

Solution

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