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Q.

Alkali metals are highly reactive elements and form many compounds.  Correct statement among the following about alkali metal carbonate is

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a

Washing soda Na2CO3.10H2O  is efflorescent

b

Above 375K, washing soda converts to  Na2CO3.7H2O

c

Na2CO3  is an antiseptic for skin infections

d

NaHCO3  is more soluble than  Na2CO3

answer is A.

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Detailed Solution

1)Na2CO3.H2O   is formed2)NaHCO3 is a skin antiseptic3)Solubility  of NaHCO3 < Na2CO3
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Alkali metals are highly reactive elements and form many compounds.  Correct statement among the following about alkali metal carbonate is