The Amazing World of Solutes, Solvents, and Solutions — Science STD 8 — Question

Name one disease which spreads through insect bites.

Is it possible to extract petroleum from under the sea-bed?

Name three characteristics which are used to describe oscillations (or vibrations).

Why did the Government of India ban frog leg exports?

Two glass jars A and B are filled with carbon dioxide and oxygen gases respectively. In each jar, a lighted candle is placed simultaneously. In which jar, will the candle remain lighted for a longer time and why ?

Name the petroleum product which is commonly used for electric generators.

An electric spark is struck between two electrodes placed near each other in a closed tank full of petrol. Will the petrol catch fire? Explain your answer.

Define the calorific value of a fuel.

Name the man-made fibre prepared from natural materials.