Who suggested that most of the mass of the atom is located in the nucleus?
- (A) John Dalton
- (B) Bohr
- (C) Rutherford
- (D) Thompson
- (C) Rutherford
Who proposed the “Law of Conservation of Mass”?
- (A) Rutherford
- (B) Lavoisier
- (C) Romano
- (D) Joseph Proust
- (B) Lavoisier
Who proposed that the orbits of electrons in an atom are elliptical?
- (A) Neil Bohr
- (B) J.J. Thomson
- (C) Arnold Sommerfeld
- (D) Ernest Rutherford
- (C) Arnold Sommerfeld
First atomic model was proposed by:
- (A) Rutherford
- (B) John Dalton
- (C) Neil Bohr
- (D) De Broglie
- (B) John Dalton
According to the Dalton’s atomic theory, the smallest particle which can exist independently is:
- (A) An atom
- (B) An anion
- (C) A molecule
- (D) A cat-ion
- (A) An atom
Dalton’s atomic theory gave the concept of:
- (A) Electrons
- (B) Valency
- (C) Ionization
- (D) Radioactivity
- (B) Valency
Who presented the concept of orbit in an atom?
- (A) Thomson
- (B) Bohr
- (C) Planck
- (D) Rutherford
- (B) Bohr
The Periodic Table which arranges chemical elements according to their Atomic number and chemical properties was formulated by:
- (A) John Dalton
- (B) Dmitri Mendeleev
- (C) Otto Hahn
- (D) Antoine Lavoisier
- (B) Dmitri Mendeleev
In medical sciences, what Ronald Ross discovered?
- (A) Cause of dengue
- (B) Cause of malaria
- (C) Cause of typhoid
- (D) Cause of measles
- (B) Cause of malaria
The phenomena of electro magnetism was first explained by:
- (A) Oersted
- (B) Maxwell
- (C) Simon Ohm
- (D) Faraday
- (A) Oersted