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Q.

Oxidation numbers of sodium, mercury in sodium amalgam are

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a

 0, 0

b

0, +1

c

+1, –1

d

–2, +2

answer is A.

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Detailed Solution

  • Amalgams are not compounds. 
  • They are the mixtures of different chemical substances with different compositions. 
  • There is no chemical combination or chemical reaction between mercury and sodium in sodium amalgam. Hence the oxidation state of mercury and sodium are zero.
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