set 1 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) Isobars
(b) Allotropes
(c) Isotope
(d) Both isotopes and allotropes
The correct answers to the above question in:
Answer: (b)
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Read more chemistry basic Based General Science Questions and Answers
Question : 1
An a-particle consists of which of the following?
a) 2 protons and 4 neutrons
b) 1 proton and 1 electron
c) 2 protons and 2 neutrons
d) 1 proton and 1 neutron
Answer »Answer: (c)
Question : 2
Constituents of atomic nucleus are
a) Electron and neutron
b) Proton and neutron
c) Electron and proton
d) Proton, neutron and electron
Answer »Answer: (b)
Question : 4
The percentage of copper and oxygen in samples of CuO obtained by different methods were found to be the same. The illustrate the law of
a) conservation of mass
b) multiple proportions
c) constant proportions
d) reciprocal proportions
Answer »Answer: (c)
Constant proportions according to which “a pure chemical compound always contains same elements combined together in the same definite proportion of weight.”
Question : 5
A group of atoms chemically bonded together is a (an)
a) ion
b) salt
c) molecule
d) element
Answer »Answer: (c)
In a molecule two or more than two atoms are convalently bonded with each other.
Question : 6
What is the mass (in grams) of 3 moles of N?
a) 42
b) 28
c) 14
d) 56
Answer »Answer: (a)
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