Q11 of 49 Page 20

Which of the following represents a correct chemical formula? Name it.

(a) CaCl


(b) BiPO4


(c) NaSO4


(d) NaS

Bismuth phosphate (BiPO4) represents a correct chemical formula as in Bismuth phosphate (BiPO4) both ions (Bi+3 and PO4-3) are trivalent.


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3.42 g of sucrose are dissolved in 18g of water in a beaker. The number of oxygen atoms in the solution are

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A change in the physical state can be brought about

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Write the molecular formulae for the following compounds

(a) Copper (II) bromide


(b) Aluminium (III) nitrate


(c) Calcium (II) phosphate


(d) Iron (III) sulphide


(e) Mercury (II) chloride


(f) Magnesium (II) acetate

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Write the molecular formulae of all the compounds that can be formed by the combination of following ions

Cu2+, Na+, Fe3+, Cl-, SO42-, PO43-