The half-life period of a radioactive element depends on its __________

Which one of the following is the correct sequence of various stages of operating cycle of a manufacturing company? 1. Raw material conversion period, work-in-progress conversion period, Finished goods conversion period, Receivables conversion period 2. Raw material conversion period, work-in-progress conversion period, Creditors payment period, Receivables conversion period 3. Creditor payment period. Raw material conversion period, Receivables conversion period, work-in- progress conversion period 4. Raw material conversion period, Finished goods conversion period, work-in- progress conversion period. Receivables conversion period

A

1

B

2

C

3

D

4

Which of the following statements are true?
1. All radioactive elements decay exponentially with time.
2. Half-life time of radioactive elements is the time required for one-half of the radioactive atoms to disintegrate.
3. Age of the earth can be determined by radioactive dating.
4. Half-life time of a radioactive element is fifty percent of its average life period.
Select the correct answer:

A

1 and 3

B

1, 3 and 4

C

1, 2 and 3

D

2 and 3

Nuclear wastes is waste that contains radioactive material. Radioactive material is normally a by product of nuclear power generation. Radioactive waste is regulated by government agencies in order to protect human health and the environment. Radioactivity naturally decays over time, so radioactive waste has to be isolated and confined in appropriate disposal facilities for a sufficient period until it no longer poses a threat. Which of the following statements can be inferred from the paragraph?

A

Radioactive material is very expensive.

B

Since radioactive material decays over time, it is not hazardous.

C

Radioactive material is extremely hazardous to humans.

D

Disposal of radioactive material, is extremely difficult.

The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then

A

$${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months

B

It will completely disintegrate in two months

C

It will completely disintegrate in four months

D

$${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months

The half-life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half-life period of a radioactive substance is one month, then?

A

it will completely disintegrate in two months

B

l/8th of it will remain intact at the end of four months

C

3/4th of it will disintegrate in two months

D

it will completely disintegrate in four months

The critical reasoning question is based on a short argument, a set of statements, or a plan of action. For each question, select the best answer of the choices given. Radioactive pollution is highly dangerous and has become a very important topic to be concerned about in today's scenario. Radioactive pollution is caused when radioactive byproducts of a nuclear reaction is dumped in the environment. This is contaminating the eco-system causing air, water and soil pollution. It can lead to cancer in humans when it comes in contact with the body. Given below are few options, select which isn't one of the effects of this on the humans.

A

Low levels of exposure can cause mild skin irritation.

B

If human body comes in contact with these it causes nausea, vomiting, diarrhea.

C

When radioactive waste is introduced in water bodies it affects the entire aquatic food web.

D

Radioactive rays can cause damage to DNA molecules.

E

If parents are exposed to such radiations, their child could have severe birth defects.

When the viruses are cultivated in the medium containing radioactive Sulphur, then these viruses possess radioactive DNA but not radioactive protein.

A

True

B

False

The half life period of a radioactive element depends on its

A

Temperature

B

Pressure

C

Amount

D

None of these

The half life period of a radioactive element depends upon its

A

temperature

B

pressure

C

amount

D

none of these

The half-life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm.

A

1/2

B

1/4

C

1/8

D

1/16

The half-life period of a radioactive element depends on its __________

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