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
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