Alpha Question Bank for Engineering: Chemistry>Chapter 11 - Nuclear Chemistry>Exercise-2>Q 4

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Important Questions on Nuclear Chemistry

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Alpha Question Bank for Engineering: Chemistry>Chapter 11 - Nuclear Chemistry>Exercise-2>Q 5

A.G.M. counter is used to study the radioactive process of first-order. In the absence of radioactive substance A, it counts 3 disintegration per second

(d p s)

. When A is placed in the

G . M

. counter, it records

23 d p s

at the start and

13 d p s

after

10 m i n u t e s

. It records

x d p s

after next

10 m i n u t e s

and A has half-life period y minutes.

x

and

y

are :

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Alpha Question Bank for Engineering: Chemistry>Chapter 11 - Nuclear Chemistry>Exercise-2>Q 6

If $80 %$ of a radioactive element undergoing decay is left over after a certain period of time $t$ from the start, how many such periods should elapse from the start for just over $50 %$ of the element to be left over ?

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Alpha Question Bank for Engineering: Chemistry>Chapter 11 - Nuclear Chemistry>Exercise-2>Q 7

Rate of radioactive disintegration

(- dN / dt)

is also known as :

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Alpha Question Bank for Engineering: Chemistry>Chapter 11 - Nuclear Chemistry>Exercise-3>Q 3

In the nuclear transmutation

{}_{4}^{9}{Be} + X \to {}_{4}^{8}{Be} + Y

,

(X, Y)

is (are)

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Alpha Question Bank for Engineering: Chemistry>Chapter 11 - Nuclear Chemistry>Exercise-3>Q 4

Which of the following nuclear reactions will generate an isotope?

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Alpha Question Bank for Engineering: Chemistry>Chapter 11 - Nuclear Chemistry>Exercise-3>Q 6

{}_{64}{Cu} (half‑life = 12.8 h)

decays by

β^{-}

emission

(38 %)

,

β^{+}

emission

(19 %)

, and electron capture

(43 %) .

Write the decay products and calculate partial half-life for each of the decay processes.

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Alpha Question Bank for Engineering: Chemistry>Chapter 11 - Nuclear Chemistry>Exercise-4>Q 1

Which of the following process not lead to the formation of isobars?

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Alpha Question Bank for Engineering: Chemistry>Chapter 11 - Nuclear Chemistry>Exercise-4>Q 3

The fundamental particle responsible for keeping the nucleus together is.