Question

Taking help from the list prepared in Q4,, write the chemical formulae of:-(i) Barium chloride (ii) Sodium Sulphate (iii) Ammonium phosphate (iv) Calcium hydroxide(v) Aluminium carbonate (vi) Magnesium hydrogen carbonate (vii) Zinc sulphide(viii) copper (×) chloride (ix) Potassium Bromide (x) Lead nitrate (xi) Iron ( ×××) oxide (xii)Sodium Oxide (xiii) Silver sulphide (xiv) Calcium Fluoride

Answer 1

hope it will ne alright

Answer 2

The equation is ----

Lead (II) nitrate → Lead (II) oxide + Nitrogen dioxide + Oxygen

The balanced equation is----

2 Pb(NO3)2 (s) → 2 PbO (s) + 4 NO2 (g) + O2 (g)

The chemical name of white salt is Lead nitrate Pb(NO3)2.

The salt on heating produces brown fumes. This is so because the salt

contains nitrate ion. This salt can be any nitrate but if the residue

left after heating is yellow in colour it definitely implies that the salt is lead

nitrate.

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