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Oxidation number of S in Na2S2O3 is:
(A) +1
(B) +2
(C) +3
(D) +4
Answer: (B) +2
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The sum of enthalpy changes during a chemical reaction of more than one step is zero. This is called:
What will be the correct order of vapour pressure for water, acetone and ether at 30°C. Given that among these compounds, water has maximum boiling point and ether has minimum boiling point?