P-2 Towards Green Energy — Science STD 10 — Question

Why is LPG considered a good fuel?

Explain how, mercury is extracted from its sulphide ore (cinnabar). Give equations of the reactions involved.

Write the full forms of the following as they occur in biology:

1. STD.
2. AIDS .
3. HIV.

A certain form of energy which is not sourced directly or indirectly from the sun and does not cause any pollution is very easily converted into electricity. This form of energy is, however, not available everywhere. Moreover, it is technically very difficult and expensive to obtain it. Name the form of energy.

Whether the new organism is genetically exactly similar to earlier one that has produced it?

What were the two criteria used by Mendeleev to classify the elements in his periodic table?

What is the importance of balanced diet for our body?

Name the physical quantity used to express the amount of water vapour present in air.

Electric motor and Electric generator.

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.