set 3 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 3 EXERCISES
The following question based on atomic structure, molecules and nuclear chemistry topic of general science mcq
(a) O2
(b) O3
(c) O
(d) All contains same
The correct answers to the above question in:
Answer: (b)
The no. of atoms in O3 is maximum i.e., 3
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Read more chemistry basic Based General Science Questions and Answers
Question : 1
What is the number of water molecules present in a tiny drop of water ( volume 0.0018 ml ) at room temperature?
a) 6.023 × 1019
b) 4.184 × 1018
c) 4.84 × 1017
d) 6.023 × 1023
Answer »Answer: (a)
Question : 2
Which of the following is not a subatomic particle?
a) Proton
b) Deuteron
c) Neutron
d) Electron
Answer »Answer: (b)
Question : 3
In an atom, the order of filling up of the orbitals is governed by
a) Heisenberg’s uncertainty principle
b) Hund’s rule
c) Aufbau’s principle
d) Pauli’s exclusion principle
Answer »Answer: (c)
Question : 4
Protons and neutrons are bound in a nucleus by the
a) long range ‘electromagnetic interaction’
b) short range ‘strong interaction’
c) short range ‘weak interaction’
d) long range ‘gravitational interaction’
Answer »Answer: (b)
Question : 5
Which of the following statement about molecular structure is correct?
a) Electron and proton are inside the nucleus and neutron revolve around the nucleus
b) Proton and neutron are inside the nucleus and electrons revolve around the nucleus
c) Neutron and electron are found inside the nucleus and protons revolves around the nucleus
d) Proton, neutron and electron all are inside the nucleus
Answer »Answer: (b)
Question : 6
Which one of the following laws explains the formation of carbon monoxide and carbon dioxide from carbon and oxygen?
a) Law of multiple proportions
b) Law of reciprocal proportions
c) Law of conservation of mass
d) Law of difinite proportions
Answer »Answer: (a)
Law of multiple proportions explains the formation of CO and CO2 , in these same weight of carbon that combines with weights of oxygen are in simple rate of 1 : 2.
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