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Question

In the decay sequence, 23892Ux1 23490Thx2 23491Pax3 234 Zx4 23090 Th x1,x2,x3 and x4 are particles /radiation emitted by the respective isotopes. The correct option(s) is/are:

A
x3 is γray
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B
Z is an isotope of uranium
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C
x2 is β decay
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D
x1 will deflect towards negatively charged plate
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Solution

The correct option is D x1 will deflect towards negatively charged plate
a) Given 23491Pax3 234 Z
Since the mass number does not change, x3 is 01e i.e. β. So x3 is not γ-ray.
b) Isotopes are elements which have the same atomic number but different mass number. Thus Z is an isotope of uranium.
c) 23490Th 23491Pa+o1e. Thus x2 is β.
d) 23892U 23490Th+42He2+. So x1 is an α-particle and hence will get deflected towards the negatively charged plate.

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