i) Salts of which elements are generally coloured :

ii) Which one of the following salt solutions on reaction with excess of ammonium hydroxide solution gives a deep blue solution ?

iii) Which one of the following salt solutions on reaction with excess sodium hydroxide solution gives a clear solution finally ?:

iv) The precipitate of which of the following compounds is soluble in excess of ammonia solution ?

v) Which one of the following salt solutions on reaction with excess of ammonium hydroxide solution results finally in dissolution of the precipitate first formed?

vi) Hydroxide of this metal is soluble in sodium hydroxide solution:

vii) The hydroxide which is soluble in excess of NaOH is:

viii) Name the reagent from the following which can be used to distinguish zinc nitrate solution from magnesium nitrate.

ix) The oxide and hydroxide of which metal is amphoteric:

x) Anhydrous iron(III) chloride is prepared by:

xi) A chloride which forms a precipitate that is soluble in excess of ammonium hydroxide is:

xii) Ferrous salts are............in colour.

xiii) Both ammonium and sodium hydroxide are used in analytical chemistry for identifying....... of salts.

xiv) Zinc chloride solution reacts with ammonium hydroxide solution to give a ....................... coloured precipitate.

xvi) ............... and ............salt dissolve in sodium hydroxide.

xvii) Amphoteric oxides and hydroxides react with an.........to give salt and water only.

xviii) The substance which react with hot conc. NaOH solution and undergoes a neutralization reaction ……………..

xv) Sodium zincate and water is obtained on reaction of ............with concentrated caustic soda.

xix) The hydroxide which is soluble in excess of NaOH is …………….

xx) Hydroxide of this metal is soluble in NaOH solution: