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) conservation of mass
(b) multiple proportions
(c) constant proportions
(d) reciprocal proportions
The correct answers to the above question in:
Answer: (c)
Constant proportions according to which “a pure chemical compound always contains same elements combined together in the same definite proportion of weight.”
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Read more chemistry basic Based General Science Questions and Answers
Question : 1
Members of which of the following have similar chemical properties ?
a) Isobars
b) Allotropes
c) Isotope
d) Both isotopes and allotropes
Answer »Answer: (b)
Question : 2
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 : 3
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
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 : 5
What is the mass (in grams) of 3 moles of N?
a) 42
b) 28
c) 14
d) 56
Answer »Answer: (a)
Question : 6
How many moles of hydrogen atom are present in one mole of Aluminium hydroxide ?
a) Three moles
b) Two moles
c) one mole
d) Four moles
Answer »Answer: (a)
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