Subject :NSO Class : Class 9
Elements X, Y and Z have valencies 1, 3 and 4 respectively. Formula unit masses of their oxides are 62, 102 and 64 respectively. If atomic mass of Z is divided by the difference in atomic masses of X and Y then value obtained is the atomic number of which of the following elements?
ACarbon
BNitrogen
COxygen
DFluorine
Ans 1:
Class : Class 10
z/(x-y) = 32/19 is not among the option of elements given.
Ans 2:
Class : Class 9
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