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WorksheetsChemistry Quiz
Total questions: 20
Worksheet time: 10mins
How many particles are there in 1 mole?
6.022 × 10^23
3.011 × 10^23
1.602 × 10^-19
1000
Avogadro’s number is used for?
Measuring mass
Measuring volume
Representing number of particles
Measuring density
Atomic mass of an element is expressed in which unit?
Gram
Kilogram
Atomic mass unit (amu)
Mole/Litre
Volume of 1 mole of gas at STP is?
22.4 L
2.24 L
1 L
0.224 L
Number of molecules in 0.5 mol of H₂O is?
3.011 × 10^23
6.022 × 10^23
1.505 × 10^23
2 × 10^23
Moles of hydrogen in 18 g of H₂O?
1 mol
2 mol
3 mol
0.5 mol
Molarity (M) is defined as:
Mass of solution / Volume of solvent
Moles of solute / Volume of solution (in L)
Mass of solute / Volume of solution (in mL)
Moles of solute / Mass of solvent
Moles of NaCl in 500 mL of 0.1 M solution are:
0.05 mol
0.1 mol
0.5 mol
5 mol
Empirical formula represents:
Total number of atoms in a molecule
Simplest whole-number ratio of atoms
Actual number of atoms in a molecule
Atomic weights of elements
Which statement of Dalton’s atomic theory is incorrect?
All elements are made up of indivisible particles
All atoms of a given element have the same mass
Atoms are neither created nor destroyed in chemical reactions
Atoms are made of subatomic particles
Molar mass of 1 mol CaCO₃ is approximately:
50 g/mol
74 g/mol
100 g/mol
56 g/mol
Number of oxygen atoms in 2 mol of O₂ is:
1.204 × 10^24
2.408 × 10^24
6.022 × 10^23
4.8 × 10^24
Number of moles in 44.8 L of CO₂ at STP is:
1 mol
2 mol
3 mol
4 mol
Molality (m) is defined as:
Moles of solute / Volume of solution (in L)
Moles of solute / Mass of solvent (in kg)
Mass of solute / Mass of solvent
Mass of solute / Volume of solution
If molar mass of a gas is 44 g/mol, mass of 2 moles is:
22 g
44 g
66 g
88 g
Mass of 0.5 mole of H₂SO₄ is:
49 g
50 g
98 g
24.5 g
Which quantity remains same for equal moles of different substances?
Mass
Volume at STP
Number of molecules
Density
1 mole of electrons carries charge equal to:
1.6 × 10^-19 C
9.11 × 10^-31 C
96,485 C
6.022 × 10^23 C
Mass of 22.4 L of N₂ at STP is:
28 g
14 g
32 g
2 g
Which is not a SI unit?
Kilogram
Mole
Litre
Second
