P-2 Environmental management — Science STD 10 — Question

Read the following extract and answer the questions that follow:
A liberal view behind the concept of organ and body donation is that after death our body should be useful to other needful persons so that their miserable life would become comfortable. Awareness about these concepts is. increasing in our country and people are voluntarily donating their bodies.

Life of many people can be saved by organ and body donation. Blinds can regain their vision. Life of many people can be rendered comfortable by donation of organs like liver, kidneys, heart, heart valves, skin, etc. Similarly, body can be made available for research in medical studies. Many government and social organizations are working towards increasing the awareness about body donation.
1.What is the liberal view behind the organ and body donation?
2.Name any four organs that can be donated.

Explain the concept of Roasting.

An electric bulb is connected to a 220V power supply line. If the bulb draws a current of 0.5A, calculate the power of the bulb.

Does geographical isolation of individuals of a species lead to the formation of a new species? Provide a suitable explanation for your answer.

State and explain the laws of refraction of light with the help of a labelled diagram.

What is meant by saying that the blood pressure of a person is 120/80?

What is meant by bioconcentration of pesticides? Which common pesticide has accumulated in human body in considerable amounts?

How much heat will be required to convert 20 g of water at 100 °C into steam at 100 °C? (Specific latent heat of vaporization of water = 540 cal/g)

Inspect the molecular formulae of the member of Alkenes.
Do you find any relationship in the number of carbon atoms and the number of hydrogen atoms in the molecular formulae

Give the harmful effects of drinking alcohol.