The absolute value of charge on electron was determined by ________ ?

A. J.j.thomson
B. Chadwick
C. Rutherford
D. Robert millikan

The discovery of neutron became very late because _______ ?

A. It does not carry any charge
B. It does not move
C. It is a fundamental particle
D. It is present in nucleus

What is the molecular formula for Nitric acid ________ ?

A. Hno2
B. Hno3
C. Hn2o2
D. H2no4

Which among the following is not a property of Ionic bond _________?

A. Sharing of electrons
B. Transfer of electrons
C. Losing of electrons
D. Gain of electrons

Sum of protons and neutrons in an atom gives off _________ ?

A. Nucleon numbera
B. Mass number
C. Atomic number
D. Both a and b

What is the molecular weight of Ammonia (NH3) ________ ?

A. 17.031 g/mol
B. 18.031 g/mol
C. 19.031 g/mol
D. 27.033 g/mol

Which law states that the rate of the effusion of a gas is inversely proportional to the square root of its density?

A. Graham’s law
B. Gay-lussac’s law
C. Boyle’s law
D. None of these

The valency of carbon Atom is __________ ?

A. 1
B. 2
C. 3
D. 4

Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?

A. Zeolites
B. Sulphonides
C. Lime
D. Nitrates

Which of the following noble gases is not present in atmosphere?

A. Argon
B. Helium
C. Radon
D. Xenon