Q.

One gm metal M3+ was discharged by the passage of 1.81 x 1023 electrons. what is the atomic weight of metal?

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33.35

133.4

66.7

None of these

answer is D.

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Detailed Solution

When 1 mole of e- passed, wt. of substance deposited=1×6.023×10231.81×1023⇒3.34g=eq.wt∴atomic wt. of metal =3.34 x 3 = 10.03 g

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