Heredity and Evolution — Science STD 10 — Question

The following questions are about the nuclear reactor of a power plant.
What is the function of boron rods in the nuclear reactor?

If two lenses with focal lengths – 10 cm and 40 cm respectively are kept in contact with each other, what can you say about the behaviour of the combination of the lenses?

Name an indicator which is pink in alkaline solution but turns colourless in acidic solution.

The chemical reaction during which H2(g) is lost is termed as………

State number of electrons in the outermost orbit of carbon and valency of carbon.

Which is more basic (or more alkaline): a solution of pH = 8 or a solution of pH = 11?

If a ray of light goes from a rarer medium to a denser medium, will it bend towards the normal or away from it?

What is the other name of Maxwell’s right-hand thumb rule?

Which metal is extracted from calamine ore?

Why is the process of ‘reuse’ better than that of ‘recycling’ ?Why is the process of ‘reuse’ better than that of ‘recycling?