P-1 Metallurgy — Science STD 10 — Question

Name the energy currency in the living organisms. When and where is it produced?

What type of respiration takes place in human muscles during vigorous physical exercise? Give reason for your answer.

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.

Explain why, the galvanised iron article is protected against rusting even if the zinc layer is broken.

Define : Galvanizing

How are isotopes of different elements placed in the Modern Periodic Table?

State two advantages of using wind energy for generating electricity.

Explain the following reactions giving their balanced chemical equations: Copper reacts with conc. nitric acid.

In many applications, solar cells are connected to rechargeable batteries. Why is this so?