The isotope of uranium capable of sustaining chain reaction is

Kilowatt is a unit to measure

How many colours the sunlight spectrum has?

'No two electrons in an atom can have the same set of four quantum numbers' is

Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?

The age of most ancient geological formations is estimated by

According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .

Which of the following shows the masses of the three elementary particles in decreasing order?

Who suggested that most of the mass of the atom is located in the nucleus?

A chronometer measures

The major ingredient of leather is

The type of glass used in making lenses and prisms is

Atoms of an element differ from those of all other elements in

What is the wavelength of visible spectrum?

The dark lines in the solar spectrum are due to

Glass is made of the mixture of

Which of the following is used for removing air bubbles from glass during its manufacture?

What are the soaps?

How does common salt help in separating soap from the solution after saponification?

Which one of the following is the petroleum wax?

Nuclear fission is caused by the impact of

The vast resources of unutilised natural gas can be used in the production of

Which of the following is a protein?

In vulcanisation, natural rubber is heated with

Paper is manufactured by

Wood is the main raw material for the manufacture of

Deep blue colour is imparted to glass by the presence of

Gypsum is added to cement clinker to

Rayon is chemically

Soap is a mixture of sodium or potassium salts of