Which one of the following phrases would be incorrect to use?
Which of the following illustrates the law of conservation of mass?
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A compound contains 8% sulphur by mass. The minimum molecular weight of the compound is:
Identify the correct one from the following statements.
18 g of water is electrolysed. The weight of oxygen formed will be
Modern atomic symbols are based on the method proposed by
Which of the following is the chemical symbol for nitrogen gas?
Molecular weight of CuS04. 5H20 is equal to
[Cu = 63.5 u, S = 32 u, O — 16 u, H = 1 u]
Which of the following represents a correct chemical formula?
How many moles of electrons weigh equal to one kilogram? [Mass of 1 e = 9.1 x 10-31 kg]
3.42 g sucrose are dissolved in 18 g of water in a beaker. The number of oxygen atoms in the solution are
Arrange the following in increasing order of number of molecules.
I. 0.5 mol of H2
II. 4.0 g of H2
III. 18 g of H2O
IV 2.2 g of CO2
Which of the following symbols is incorrect?
(i) Helium (He)
(ii) Aluminium (AL)
(iii) Carbon (c)
(iv) Cobalt (CO)
Select the correct alternative:
133 videos|399 docs|221 tests
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133 videos|399 docs|221 tests
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