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Q.

The mass of hydrogen atom is 1.66×10–24 g. and Planck's constant is 6.64 × 10–27erg-sec. The de Broglie wavelength of a hydrogen atom moving with a velocity half that of light is

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a

2.66 × 10–13

b

2.66 × 10–5

c

2.66 × 10–27

d

2.66 × 10–10

answer is A.

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Detailed Solution

λ=hmv=6.626 ×10-341.66 × 10-27×32×108=2.66×10-5  Ao    .

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