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WorksheetsAtoms and Molecules
Total questions: 10
Worksheet time: 5mins
Which of the following has the smallest mass?
6.023 x 1023 atoms of He
1 atom of He
2 g of He
1 mole atoms of He
Which of the following is a triatomic molecule?
Glucose
Helium
Carbon di Oxide
Hydrogen
The volume ocupied by 4.4 g of CO2 at S.T.P
22.4 litre
2.24 litre
0.24 litre
0.1 litre
Mass of 1 mole of Nitrogen atom is
28 amu
14 amu
28 g
14 g
Which of the following represents 1 amu
Mass of C-12 atom
Mass of hydrogen atom
1/12th of the mass of a C-12 atom
Mass of O-16 atom
Which of the following statement is incorrect?
One gram of C -12 contains Avogadro's number of atoms
One mole oxygen gas contains Avogadro's number of atoms
One mole hydrogen gas contains Avogadro's number of atoms
one mole of electrons stands for 6.023 x 1023 electrons
The volume occupied by 1 mole od a diatomic gas at STP is
11.2 litre
5.6 litre
22.4 litre
44.8 litre
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
The gram molecular mass of Oxygen molecule is
16 g
18 g
32 g
17 g
1 mole of any substance contains ..... molecules
6.023 x 1023
6.023 x 10-23
3.0110 x 1023
12.046 x 1023
