A. Isobars
B. Isotones
C. Isotopes
D. None of these
Related Mcqs:
- Equal masses of CH4 and H2 are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is___________________?
A. 1/9
B. 8/9
C. 1/2
D. 5/9 - What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20) ?
A. AB3
B. A2B3
C. A2B
D. AB2 - A sample of well water contains 140 gm/m3 Ca2+ ions and 345 gm/m3 Na+ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO3 in gm/m3 is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16) ?
A. 350
B. 485
C. 140
D. 345 - “The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances”. This is the_________________?
A. Lewis-Randall rule
B. Statement of Van’t Hoff Equation
C. Le-Chatelier’s principle
D. None of these - Isotopes are atoms having the same _____________________?
A. Mass number
B. Number of neutrons
C. Atomic mass
D. None of these - The total number of atoms in 8.5 gm of NH3 is _______________ × 1023?
A. 9.03
B. 3.01
C. 1.204
D. 6.02 - In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material ?
A. Tin
B. Lead
C. Zinc
D. Glass - There are one octahedral void and ______________ tetrahedral void in the closest packing of atoms ?
A. One
B. Two
C. Three
D. None of these - Neutrons are present in all atoms except that of ___________________?
A. He
B. C
C. H
D. Ar - The number of atoms of oxygen present in 11.2 litres of ozone (O3) at N.T.P. are__________________?
A. 3.01 × 1022
B. 6.02 × 1023
C. 9.03 × 1024
D. 1.20 × 1024
