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Published on: 28/08/2019
Atoms and Molecules
Download Tamil Nadu 10th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
Which among the following is a homo atomic molecule?
N2
NH3
HCl
N2O
2.
Pick out the isotopes among the following pairs
6C13, 7N14
18Ar4, 20Ca4
6C12, C614
5B12, 6C13
3.
The mass of an atom is measured in ____________
kg
amu
g
Pm
4.
In the nucleus of 20Ca40, there are
20 protons and 40 neutrons
20 protons and 20 neutrons
20 protons and 40 electrons
40 protons and 20 electrons
5.
Which of the following represents 1 amu?
Mass of a C – 12 atom
Mass of a hydrogen atom
1/12th of the mass of a C – 12 atom
Mass of O – 16 atom
6.
The value of Avogadro's number is ______________
7.
The mass of the molecule of an element or compound is measured in ______________ scale.
8.
Atomicity of phosphorous is ___________
9.
One mole of any gas occupies ________ ml at S.T.P
10.
The number of atoms present in a molecule is called its ____________
11.
Diatomic
12.
Monoatomic
13.
52 g of He
14.
4 g of H2
15.
8 g of O2
1.
(a)
N2
2.
(c)
6C12, C614
3.
(b)
amu
4.
(b)
20 protons and 20 neutrons
5.
(c)
1/12th of the mass of a C – 12 atom
6.
( )
6.023 x 1023
7.
( )
C-12
8.
( )
4
9.
( )
22400
10.
( )
atomicity
11.
H2
12.
He
13.
13 moles
14.
2 moles
15.
0.25 moles
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
