[ Question Bank ] - 2022 — Science STD 10 — Question

Survival of fittest : Darwin :: Acquired characters :……….

When potassium nitrate is heated, it decomposes into potassium nitrite and oxygen. Write a balanced equation for this reaction and add the state symbols of the reactants and products.

Chlorine : 2, 8, 7 :: Fluorine : ……..

An object is placed at 60 cm from a convex lens of focal length 20 cm. State the nature and size of the image relative to that of the object.

Name the spherical mirror which can produce a real and diminished image of an object.

What is absolute refractive index?

What is the name of yellow powdery substance present in the anther of a flower?

Which colour of the spectrum has:

1. longest wavelength?
2. shortest wavelength?

What kind of mirrors are used in big shopping centres to watch the activities of the customers?

All chromosomes are arranged parallel to equatorial plane of cell in …………. phase of mitosis.