Metals and Non-Metals — Science STD 10 — Question

What is meant by a renewable source of energy? Give two examples of renewable sources of energy.

What would be the consequence of a deficiency of haemoglobin in our body?

What are the disadvantages of fossil fuels?

Write the harmful effects of ozone depletion?

Why is small intestine in herbivores longer than in carnivores?

What is the main difference in the wiring of an electric bulb and a socket for using an electric iron in a domestic electric circuit? What is the reason for this difference?

Write the balanced chemical equation for the following reaction and identify the type of reaction.
Sodium hydroxide solution is treated with acetic acid to form sodium acetate and water.

How do metals react with hydrogen? Explain with an example.

Draw ray diagrams showing the image formation by a convex lens when an object is placed:At twice the focal length of the lens.

Explain why, it is dangerous to inhale air containing carbon monoxide.