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61. How many percentage of fissionable U-235 occurring in uranium?

0.1% 0.5% 0.7% 1.5%

0.7%

Naturally occurring uranium contains only 0.7% of fissionable U-235, which is not enough for most types of rectors. It is necessary to increase amount of U-235 by enrichment, although it is a difficult and expensive process.

Hint Answer

62. Nuclear energy is only harmful.

True False

False

Nuclear energy can be both beneficial and harmful, depending on way in which it is used. For example X-rays which are used to examine bone fracture is useful. Nuclear bombs are harmful for both organisms and environment.

Hint Answer

63. When did Chernobyl disaster occurred?

1976 1986 1996 2000

1986

Chernobyl disaster occurred in 1986. Chernobyl is a small city in Ukraine. On 25 April 1986 explosion blew 1000 metric ton concrete roof from reactor and reactor caught fire. This results in world?s worst nuclear accident.

Hint Answer

64. Which State in India nuclear accident took place?

Tamil Nadu Karnataka Gujarat Rajasthan

Tamil Nadu

A small amount of nuclear accident observed in villages and towns around Kalpakkam Nuclear Station, south of Chennai in Tamil Nadu, in an ongoing study by Pugazhendi. It was took place in January 2003.

Hint Answer

65. Which one of following medical condition caused by high exposure of radiation?

Kidney stone AIDS Mutation Blood pressure

Mutation

Excessive exposure to radiations leads to mutation, which are changes in genetic makeup of cells. Mutations can occur in tissues of body and may manifest mselves as abnormal tissue growth known as cancer.

Hint Answer

66. What is main purpose of nuclear energy?

To kill the enemy nation To waste the excessive energy To use it as an alternate source of energy To cause mutation for people who are working

To use it as an alternate source of energy

Nuclear energy was developed by man as an alternate source of clean and cheap energy when compared to fossil fuels. Along with benefits of nuclear energy, re have been a number of accidents which harm many lives.

Hint Answer

67. Approximately how many percentage of electricity produced by nuclear power in world?

10 14 17 20

17

Approximately 17% of electricity produced by nuclear power in world. Nuclear power is being used worldwide for generations of electricity. With numerous harm effects of nuclear power main advantage is to produce electricity from nuclear power.

Hint Answer

68. Which is main source of nuclear radiations?

Nuclear power plant Sunlight Atmospheric air Volcanoes

Nuclear power plant

The main source of radiation is nuclear power plant and particularly from core ad coolant of reactor. The fission products produced during normal operations remain within fuel element an also in nuclear wastes.

Hint Answer

69. The use of nuclear energy in war had devastating effects on humans and on earth.

True False

True

During war nuclear power is used only once so far. The United States dropped two atomic bombs over Japanese towns of Hiroshima and Nagasaki in 1945. These two atomic bombs killed thousands of people.

Hint Answer

70. In which of following way we can create awareness among people about environment efficiently?

By the help of mass media shows the importance of environment By spreading through mouths By forcefully insisting people to protecting environment By making treaties with other countries

By the help of mass media shows the importance of environment

Environmental management can only be possible through public awareness. Mass media such as newspaper, radio and television strongly influence public opinion. Through this mass media, we can create awareness for people about importance of environment.

Hint Answer

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All Chapters

View all Chapter and number of question available From each chapter from

Natural Resources

Natural Resources

Ecosystems

International Conventions and Protocols

International Conventions and Protocols

Environmental Pollution

Environmental Pollution

Forest and Wildlife Management

Forest and Wildlife Management

Social Issues and the Environment

Social Issues and the Environment

Background to International Efforts for Environmental Protection

Background to International Efforts for Environmental Protection

Human Population and the Environment

Human Population and the Environment

Biodiversity

Topics

This Chapter consists of the following topics

Social Issues and the Environment

How many percentage of fissionable U-235 occurring in uranium?

Nuclear energy is only harmful.

When did Chernobyl disaster occurred?

Which State in India nuclear accident took place?

Which one of following medical condition caused by high exposure of radiation?

What is main purpose of nuclear energy?

Approximately how many percentage of electricity produced by nuclear power in world?

Which is main source of nuclear radiations?

The use of nuclear energy in war had devastating effects on humans and on earth.

In which of following way we can create awareness among people about environment efficiently?

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