At 200^(@)C, hydrogen molecule have velo...

At `200^(@)C`, hydrogen molecule have velocity `2.4 xx 10^(5)" cm s"^(-1)`. The de Broglie wavelength in this case is approximately.

A

`1Å`

B

`1000Å`

C

`0.529xx(4)/(3)Å`

D

`10Å`

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The correct Answer is:

A

`lambda=(h)/(mv)=(6.63xx10^(-34)Js)/(((2.016)/(N_(A))xx10^(-3)kg)xx2.4xx10^(5)cm//s)=0.824xx10^(-12)~~1Å`

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