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Physical properties of Phthalic Acid
(a) Phthalic acid is colourless crystalline substance.
(b) Phthalic acid's melting point is not sharp (195-213°C).
(c) Phthalic acid is sparingly soluble in cold water but soluble in hot water, alcohol, ether, benzene etc.
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The valency of phosphorus in H3 PO 4 is: (1) 2 (2) 5 (3) 4 (4) 1 Ans: 5
assignment
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