Odd one out sodium hydroxide, pottasium nitrate,sodium sulphate,hydrochloric acid
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Hydrochloric acid - contains no oxygen atom.
All others have oxygen atom
NaOH
KNO3
Na2SO4
HCl
Another answer:
Sodium sulphate: Here the anion has valency -2 . In all other cases the valency of anion is -1
All others have oxygen atom
NaOH
KNO3
Na2SO4
HCl
Another answer:
Sodium sulphate: Here the anion has valency -2 . In all other cases the valency of anion is -1
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