49. Volume of Co, obtained at STP by the complete decomposition of 9.85 g Na,Co, is (1) 2.24 litre (2) Zero (3) 0.85 litre (4) 0.56 litre
Answers
Answered by
2
correct option is b zero
Explanation:
The chemical formula of sodium carbonate (washing soda) is Na2CO3. When it is heated it undergoes a thermal decomposition reaction. This takes place above 500 degree C. The reaction of decomposition is
Na 2CO 3 (s)→Na 2O(s)+CO 2(g)
The name of the first reaction product Na_2O is Sodium Oxide which is solid and used in glass making and the name of the second reaction product is Carbon Dioxide which is a gas
On calculating this reaction one might get answer 2.08 litres but as Na 2 CO3 is soda ash and it does not decomposes at STP And CO2
does not evolved so the answer will be zero litres
Similar questions