Free Printable Assessment 1

1.

Diagram 1 shows a model of atom.

Who discovered X?

a)

John Dalton

b)

J. J Thomson

c)

Niels Bohr

d)

James Chadwick

2.

What is formed when an atom receives electron?

a)

Anion

b)

Cation

c)

Ionic bond

d)

Covalent bond

3.

Which of the following is true about isotopes?

a)

Similar chemical properties

b)

Similar physical properties

c)

Similar number of neutrons

d)

Similar density

4.

Diagram 6 shows a graph of the temperature against time for a sample of lead solid.

Which of the labelled parts represent the melting process?

a)

W

b)

X

c)

Y

d)

Z

5.

Veronal is a barbiturate used to induce sleep in psychiatric patients. The molecular

formula of veronal is C₈H₁₂N₂O₃. Determine the relative molecular mass of veronal. (Relative atomic mass; H=1, C=12, N=14, O=16)

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6.

Atom of element R form R^2-ions. Atom of R has a proton number of 8 and a nucleon number of 16.Which of the following is correct about R^2– ion?

a)

A

b)

B

c)

C

d)

D

7.

The complete combustion of ethane gas produce carbon dioxide and water.

2 C₂H₆+ 7 O₂ → 4 CO₂ + 6 H₂O

Calculate the volume of ethane needed to produce 2.2 g of carbon dioxide at standard temperature and pressure?

[molar mass CO₂ = 44 g mol , molar volume of gas at s.t.p = 22.4 dm mol^-1]

a)

0.56 dm³

b)

1.00 dm³

c)

1.12 dm³

d)

2.24 dm³

8.

Oxygen mask contains potassium oxide, K₂O which reacts with water and carbon dioxide from exhaled air to produce oxygen.

4 K₂O + 2 H₂O + 4 CO₂ → 4 KHCO₃ + 3 O₂

Calculate the volume of oxygen gas at room temperature that can be produced from

47 g of potassium oxide.

(Relative atomic mass; O=16, K=39,

1 mole of gas occupies a volume of 24 dm³ at room condition).

a)

18 dm³

b)

12 dm³

c)

10 dm³

d)

9 dm³

9.

a)

I and II

b)

II and III

c)

III and IV

d)

I and IV

10.

a)

1.62 g

b)

16.2 g

c)

2.50 g

d)

3.85 g

11.

Which substance undergoes sublimation process when heated?

a)

Iodine

b)

Chlorine

c)

Sodium chloride

d)

Lead(II) bromide

12.

Which of the following is the use of Cobalt-60?

a)

Treatment of cancer

b)

X-ray for body examination

c)

Studying the metabolism of plants

d)

Dating for the age of fossils and artifacts

13.

a)

3.01 x 10²³

b)

6.02 x 10²³

c)

1.505 x 10²³

d)

4.515 x 10²³

14.

Which substance is a compound?

a)

Sodium

b)

Magnesium

c)

Carbon

d)

Naphthalene

15.

The following equation represents a reaction.

Zn(OH)₂ (s) + 2HNO₃ (aq) > Zn(NO3)₂(aq) + 2H₂O (l)

What are the reactants in this equation?

a)

Zinc nitrate and water

b)

Zinc nitrate and nitric acid

c)

Zinc hydroxide and nitric acid

d)

Zinc hydroxide and zinc nitrate

16.

Diagram 1 shows a standard representative of element Z. Z is not the actual symbol of the element.

Which of the following shows the electron arrangement and the number of neutrons in an atom of Z?

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17.

a)

28 cm³

b)

48 cm³

c)

96 cm³

d)

144 cm³

18.

Uranium-235 and uranium-238 are isotopes. Which statement is correct?

[Proton number of uranium= 92]

a)

Uranium-235 has 92 protons and 143 electrons

b)

Uranium-238 has 92 protons and 146 neutrons

c)

Uranium-235 has less number of electrons than uranium-238

d)

Uranium-235 has the same number of neutrons as uranium-238

19.

a)

Neils Bohr

b)

James Chadwick

c)

J.J Thomson

d)

Ernest Rutherford

20.

Which of the following is a use of iodine-131 isotope?

a)

Treatment of cancer

b)

Diagnose thyroid problems

c)

X-ray for body examination

d)

Dating for the age of fossils and artifacts

21.

a)

1 x 6.02 x 10²³

b)

4 x 6.02 x 10²³

c)

8 x 6.02 x 10²³

d)

10 x 6.02 x 10²³

22.

a)

Solid Q starts to melt at X

b)

Heat is released at WX

c)

Kinetic energy is low at Y

d)

The particles are very far apart from each other at Z

23.

Atom Y has 8 protons and 10 neutrons. What is the electron arrangement of atom Y?

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24.

Atom of element X has a proton number of 13. Where is X located in the Periodic Table

of Elements? State the group and period

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25.

Chlorine-35 and chlorine-37 are isotopes. The number of neutrons of chlorine-35 is

18. Which of the following statements is true?

a)

The chlorine-35 atom has 17 neutron.

b)

The chlorine-37 atom has 37 elektron.

c)

The chlorine-35 atom has the same number of protons as the chlorine-37 atom.

d)

The chlorine-35 atom has the same number of neutrons as the chlorine-37 atom.

26.

A compound with formula X₂CO₃ has a relative formula mass of 138.

What is the relative atomic mass of X?

[Relative atomic mass: C = 12 and O = 16]

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27.

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28.

a)

16

b)

32

c)

64

d)

70

29.

During the heating of naphthalene, C₁₀H_8, why is naphthalene not heated directly using the Bunsen burner?

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30.

What is meant by the melting point?

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31.

a)

W

b)

X

c)

Y

d)

Z

Assessment 1

Total questions: 31

Worksheet time: 1hrs 2mins

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