AIPMT 2011 Prelims | Atoms and Nuclei Question 61 | Physics

AIPMT 2011 Prelims

MCQ (Single Correct Answer)

-1

Out of Syllabus

The half life of a radioactive isotope X is 50 years. It decays to another element Y which is stable. The two elements X and Y were found to be in the ratio of 1 : 15 in a sample of a given rock. The age of the rock was estimated to be

150 years

200 years

250 years

100 years

AIPMT 2011 Prelims

MCQ (Single Correct Answer)

-1

The power obtained in a reactor using U²³⁵ disintegration is 1000 kW. The mass decay of U²³⁵ per hour is

10 microgram

20 microgram

40 microgram

1 microgram

AIPMT 2011 Prelims

MCQ (Single Correct Answer)

-1

Out of Syllabus

A radioactive nucleus of mass M emits a photon of frequency $$v$$ and the nucleus recoils. The recoil energy will be

Mc² $$-$$ h$$v$$

h²$$\upsilon $$²/2Mc²

zero

h$$v$$

AIPMT 2011 Prelims

MCQ (Single Correct Answer)

-1

Out of Syllabus

A nucleus $${}_n^mX$$ emits one $$\alpha $$ particle and two $$\beta $$ particles. The resulting nucleus is

$${}_{n - 4}^{m - 6}Z$$

$${}_n^{m - 6}Z$$

$${}_n^{m - 4}X$$

$${}_{n - 2}^{m - 4}Y$$

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