Metals and Non-Metals — Science STD 10 — Question

Why is LPG considered a better fuel than coal?

State two problems caused by the non-biodegradable waste that we generate in our daily life.

Give any two uses of ethanoic acid.

A star appears slightly higher (above) than its actual position in the sky illustrate it with the help of a labelled diagram.

Two circular coils A and B are placed close to each other. If the current in coil A is changed, will some current be induced in the coil B? Give reason for your answer.

Write the balanced chemical equations for the following reaction.
Sodium hydrogencarbonate on reaction with hydrochloric acid gives sodium chloride, water and liberates carbon dioxide.

Describe how you could demonstrate that white light is composed of a number of colours.

Explain the terms ‘analogous organs’ and ‘homologous organs’ with examples.

Why are forests considered "biodiversity hot spots"? List two ways in which an individual can contribute effectively to the management of forests and wildlife.

How does an electromagnet differ from a permanent magnet?