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Chemistry

Give the formula and valency of :
(a) aluminate
(b) chromate
(c) aluminium
(d) cupric

Chemical Formula

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Answer

The formula and valency are given in the table below:

S. No.	Name	Formula	Valency
a	aluminate	AlO₃^3-	3
b	chromate	CrO₄^2-	2
c	aluminium	Al	3
d	cupric	Cu²⁺	2

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Match the following : (Refer common names in the beginning of the book)
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(b) Phosphoric acid (ii) SiO₂
(c) Nitrous acid (iii) Na₂CO₃
(d) Nitric acid (iv) KOH
(e) Sulphurous acid (v) CaCO₃
(f) Sulphuric acid (vi) NaHCO₃
(g) Hydrochloric acid (vii) H₂S
(h) Silica (sand) (viii) H₂O
(i) Caustic soda
(sodium hydroxide) (ix) PH₃
(j) Caustic potash
(potassium hydroxide) (x) CH₄
(k) Washing soda
(sodium carbonate) (xi) NH₃
(l) Baking soda
(sodium bicarbonate) (xii) HCl
(m) Lime stone
(calcium carbonate) (xiii) H₂SO₃
(n) Water (xiv) HNO₃
(o) Hydrogen sulphide (xv) HNO₂
(p) Ammonia (xvi) H₃BO₃
(q) Phosphine (xvii) H₃PO₄
(r) Methane (xviii) H₂SO₄