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WorksheetsAtoms & Molecules -1
Total questions: 10
Worksheet time: 5mins
Which of the following pair indicates isotopes?
17Cl35,17Cl37
18Ar40,20Ca40
6C13,7N14
33As77,34Se78.
The mass of a proton is equal to:
1 amu
112th of the mass of a C – 12 atom
zero
both (a) and (b)
The sum of the number of protons and neutrons of an atom is called its _____.
nucleus
atomic number
mass number
relative atomic mass.
Total number of electrons present in 1.7 g of NH3 is:
6.023 × 1023
6.023 × 1024
6.023 × 1022
6.023 × 1025
An isotope of hydrogen without neutrons is _____.
Deuterium 1H2
Protium 1H1
Tritium 1T3
Heavy hydrogen 1D2.
Which one of the following element is used as the standard for measuring the relative atomic mass of an element in now a days?
1H2
6O12
C – 12
C – 14.
Gram molecular mass of H2SO4 is:
49 g
54 g
98 g
100 g
Which one of the following is a hetero diatomic molecule?
O2
N2
HI
CH4.
Which one of the following is an example of a polyatomic molecule?
Fluorine
Glucose
Oxygen
Sodium.
Which one of the following represent Avogadro’s law?
V ∝ 1/n
V ∝ n
V ∝ 1/n2
V2 ∝ 1/n.
