NCERT Exemplar VI — task. Science CBSE, Class 9.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Write brief answers to the following question:

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

$CaCl$
(b).

$BiPO_4$
(c).

$NaSO_4$
(d).

$NaS$

(a). Valency of Ca is , and Cl is 1. Hence, the correct formula for calcium chloride is

$CaCl_2$ .

(b). Valency of Bi is 3 and (

$PO_4$ ), i.e. phosphate ion is also . Hence, the formula of bismuth phosphate is

$BiPO_4$ .

(c). Valency of Na is and sulphate,

$SO_4$ is 2. Hence, the formula of sodium sulphate is

$Na_2SO_4$ .

(d). Valency of Na is 1, and sulphur is . Hence, the formula of sodium sulphide is

$Na_2S$ .

Did you find an error?

27. NCERT Exemplar VI