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Q.

Which of the following are wrong ?

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a

de Broglie relation is applicable only to stationary microscopic particles

b

The uncertainities in measurements are due to the imperfections of the techniques used to measure them.

c

The wave function ψ always has positive values.

d

There is high probability of finding the electron within the  boundary of an orbital.

answer is A.

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Detailed Solution

a) is wrong because de Broglie relation is applicable to all moving particles though it has significance only for microscopic particles.
b) is wrong because the uncertainities in measurement are not due to the measuring device used.
c) is wrong because ψ may be positive or negative values.

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