Q2 of 60 Page 1

What is speciation?

The process of formation of new species develop from the existing species by evolution or genetic modification is known as speciation.


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19

The image of a candle flame placed at a distance of 30 cm from a spherical lens is formed on a screen placed on the other side of the lens at a distance of 60 cm from the optical centre of the lens. Identify the type of lens and calculate its focal length. If the height of the flame is 3 cm, find the height of its image.

 1

Write the name and formula of the 2nd member of homologous series having general formula CnH2n-2

 3

Why should biodegradable and non-biodegradable wastes be discarded in two separate dustbins?

 4

List four specific characteristics of the images of the objects formed by convex mirrors.