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ICSE Class 10 Chemistry 2015 Paper

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Element XX is a metal with a valency 2,Y2, Y is a non-metal with a valency 3.
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Question : 42 of 85
Marks: +1, -0
If YY is a diatomic gas, write an equation for the direct combination of XX and YY to form a compound.
Solution:  
  3X+Y2X3Y2\;3 X + Y_2 \rightarrow X_3 Y_2
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