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Test : Atoms And Molecules- 2 - Question 1

Which one of the following phrases would be incorrect to use?

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Test : Atoms And Molecules- 2 - Question 2

Which of the following illustrates the law of conservation of mass?

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Test : Atoms And Molecules- 2 - Question 4

A compound contains 8% sulphur by mass. The minimum molecular weight of the compound is:

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Test : Atoms And Molecules- 2 - Question 6

Identify the correct one from the following statements.

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Test : Atoms And Molecules- 2 - Question 8

18 g of water is electrolysed. The weight of oxygen formed will be

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Test : Atoms And Molecules- 2 - Question 9

Modern atomic symbols are based on the method proposed by

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Test : Atoms And Molecules- 2 - Question 11

Which of the following is the chemical symbol for nitrogen gas?

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Test : Atoms And Molecules- 2 - Question 14

Molecular weight of CuS0_{4}. 5H_{2}0 is equal to

[Cu = 63.5 u, S = 32 u, O — 16 u, H = 1 u]

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Test : Atoms And Molecules- 2 - Question 15

Which of the following represents a correct chemical formula?

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Test : Atoms And Molecules- 2 - Question 16

How many moles of electrons weigh equal to one kilogram? [Mass of 1 e = 9.1 x 10^{-31} kg]

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Test : Atoms And Molecules- 2 - Question 17

3.42 g sucrose are dissolved in 18 g of water in a beaker. The number of oxygen atoms in the solution are

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Test : Atoms And Molecules- 2 - Question 18

Arrange the following in increasing order of number of molecules.

I. 0.5 mol of H_{2}

II. 4.0 g of H_{2}

III. 18 g of H_{2}O

IV 2.2 g of CO_{2}

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Test : Atoms And Molecules- 2 - Question 19

Which of the following symbols is incorrect?

(i) Helium (He)

(ii) Aluminium (AL)

(iii) Carbon (c)

(iv) Cobalt (CO)

Select the correct alternative:

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