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QNEET-2016-Ch-1102: NEET 2016 Chemistry - Class 11 NEET-2016-Ch-1102 Solution: Suppose the elements X and Y combine to form two compounds…
Suppose the elements X and Y combine to form two compounds and . When 0.1 mole of weights 10 g and 0.05 mole of weighs 9 g the atomic weights of X and Y are 40 30 60 40 20 30 3020
Multiple Choice Options
- A 40, 30
- B 60, 40
- C 20, 30
- D 30, 20
Step-by-Step Verified Solution
Assume the atomic weight of element X is x and element Y is y.
For XY 2 , n = w M o l . w t .
0.1 = 10 x + 2 y
_ x + 2 y = 10 0.1 = 100 ...(i)
For X 3 Y 2 , n = w M o l . w t .
0.05 = 9 3 x + 2 y
_ 3 x + 2 y = 9 0.05 = 180 ...(ii)
On solving equations (i) and (ii),
we get y = 30 g mol -1
Put the value of y in equation. (i)
x + 2(30) = 100
_ x = 100 - 60 = 40 g mol -1