Which of the following is an element?
(a) Graphite
(b) Silicon
(c) Brass
(d) Alumina
Answer:
Oxygen and ozone are
(a) Isobars
(b) Isotopes
(c) Isomers
(d) Allotropes
Answer:
Neutron was discovered by
(a) Priestley
(b) Rutherford
(c) J.J. Thomson
(d) Chadwick
Answer:
Which of the properties of the element is a whole number?
(a) Atomic radius
(b) Atomic volume
(c) Atomic mass
(d) Atomic number
Answer:
The first indication that a stable nucleus can be broken down was afforded by
(a) Schmidt
(b) Soddy
(c) Rutherford
(d) Madam Curie
Answer:
The heaviest naturally occurring elements is
(a) Mercury
(b) Polonium
(c) Thorium
(d) Uranium
Answer:
Red litmus paper is changed into blue in solution of
(a) Acid
(b) Salt
(c) Base
(d) None
Answer:
The biocatalysts are
(a) Plants
(b) Enzymes
(c) Minerals
(d) All proteins
Answer:
Which among the following is an extensive property of the system
(a) Viscosity
(b) Refractive index
(c) Temperature
(d) Volume
Answer:
The element that has highest first ionization potential is
(a) Nitrogen
(b) Oxygen
(c) Carbon
(d) Boron
Answer: