Which of the following statements regard...

Which of the following statements regarding fruits is correct?

Fruits are always covered by a protective covering.

Fruits develop from the ovary after fertilization.

Fruits are always present inside the seeds.

Fruits are always fleshy.

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which of the following statement regarding borax is correct

It is used in the manufacture of optical glass

It is widely used as a flux.

It is used in leather industry

All are correct.

an orbital is a definite trajectory around the nucleus in which electron can move

an orbital always has spherical trajectory

it is the region around the nucleus where there is 90 to 95% probability of finding all the electrons in an atom

an orbital is characterized by three distnict quantum number n , l and m

Brownian movement stablises sols.

In a reaction, catalyst may change qualitatively as well as physically.

An emulsion can be broken both by heating as well as freezing.

On prolonged dialysis, colloids become stable.