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Perak Trial Exam 2020 Paper 1

Total questions: 50

Worksheet time: 3hrs 30mins

Name
Class
Date
1.

Which of the following substances consist of atoms?

a)

Magnesium

b)

Oxygen

c)

Lead(II) bromide

d)

Naphthalene

2.

Why carbon-12 was chosen as a reference standard for relative atomic mass and relative molecular mass?

a)

Carbon has three isotopes

b)

Carbon is non-metal element

c)

Carbon is a solid and easier to be handle

d)

Carbon is located in Group 14 in the Periodic Table of Elements

3.

Which of the following particles equal to 1 mole?

a)

The number of atom in 1 g of hydrogen gas

b)

The number of molecule in 1 g of hydrogen gas

c)

6.02×10236.02\times10^{23} of hydrogen atoms in hydrogen gas

d)

6.02×10236.02\times10^{23} of hydrogen molecule in hydrogen gas

4.

Which of the following gases contains 0.4 mol of atoms at room temperature and pressure? [1 mol of gas occupies the volume of 24 dm3 at room temperature and pressure]

a)

4.8 dm3 He

b)

4.8 dm3 H2

c)

4.8 dm3 SO3

d)

4.8 dm3 CO2

5.

Which of the following gases exists as a monoatom?

a)

Neon gas

b)

Oxygen gas

c)

Nitrogen gas

d)

Carbon dioxide gas

6.

Which characteristics is correct about elements in Group 1 in the Periodic Table as going down the group?

a)

The tendency to release electron decreases

b)

The reactivity decreases

c)

All are conductor of heat

d)

All insoluble in water

7.
a)

W and Y

b)

W and X

c)

Y and Z

d)

X and Z

8.

a)
b)

A

c)

B

d)

C

e)

D

9.

Which of the following substances can act as an electrolyte?

a)

Conducts heat only in the molten state

b)

Conducts electricity in the molten and aqueous states

c)

Conducts electicity in the solid state

d)

Conducts electricity only in the liquid state.

10.

Which of the following substances is a monoprotic acid?

a)

Propanoic acid, C2H5 COOH

b)

Phosphoric acid, H3PO4

c)

Sulphuric acid, H2SO4

d)

Carbonic acid, H2CO3

11.

Which of the following salts can be prepared by the double decomposition method?

a)

Magnesium sulphate

b)

Ammonium chloride

c)

Copper(II) nitrate

d)

Lead (II) iodide

12.
a)

Lead glass

b)

Soda lime glass

c)

Borosilicate glass

d)

Fused silicate glass

13.

Which of the following statements is true for both methanol and propanol?

a)

Have differernt chemical properties

b)

Have similar physical properties

c)

Both have same function group

d)

Both have one similar chemical formulae

14.

What is the general formula of alkenes?

a)

CnH2n + 2

b)

CnH2n

c)

CnH2n + 1OH

d)

CnH2n + 1COOH

15.
a)

Benzyl ethanoate

b)

Ethane -1,2 - diol

c)

Ethanoic acid

d)

Ethanol

16.

Which of the following is a redox reaction?

a)

Displacement reaction

b)

Neutralisation reaction

c)

Precipitation reaction

d)

Substitution reaction

17.
a)

Iron

b)

Zinc

c)

Lead

d)

Copper

18.

a)

A

b)

B

c)

C

d)

D

19.

a)

A

b)

B

c)

C

d)

D

20.

a)

Sugar

b)

Pectin

c)

Citric acid

d)

Ethyl butanoate

21.

a)

A

b)

B

c)

C

d)

D

22.

The relative formula mass of Y3(PO4)2 is 310. Find the relative atomic mass of element Y.

[Relative atomic mass : O = 16, P = 31]

a)

12

b)

23

c)

40

d)

65

23.

What is the number of moles of copper(II) nitrate in 56.4 g of copper(II) nitrate, Cu(NO3)2? [Relative atomic mass : O = 16, Cu = 64, N = 14]

a)

0.30 mol

b)

0.32 mol

c)

0.45 mol

d)

3.33 mol

24.
a)

2.8.2

b)

2.8.6

c)

2.8.8

d)

2.8.8.4

25.

Iron and copper are transition metals. Which of the following is the special characteristic of the metals?

a)

Soft solid

b)

Soluble in water

c)

Low melting point

d)

Has more than one oxidation number

26.
a)

It is an ionic compound

b)

The compound is formed by covalent bonds

c)

The compound has high boiling point

d)

The compound is formed by electron transfer

27.

In the extraction of aluminium by electrolysing molten aluminium oxide, cryolite is added to the mixture to

a)

catalyse the electrolysis process

b)

absorb the released oxygen gas

c)

lower the melting point of aluminium oxide

d)

increase the purity of the aluminium obtained

28.
a)

A

b)

B

c)

C

d)

D

29.

a)

A

b)

B

c)

C

d)

D

30.

Calculate the percentage of nitrogen in ammonium nitrat, NH4NO3

Hitungkan peratus kandungan nitrogen dalam ammonium nitrat, NH4NO3.

a)

34.5

b)

35.0

c)

35.4

d)

53.0

31.
a)

Replace zinc powder with zinc granules

b)

Increase the volume of hydrochloric acid

c)

Decrease the concentration of hydrochloric acid

d)

Decrease the activation energy by adding copper(II) sulphate solution

32.

a)

The total surface area of the solid reactants increases

b)

The kinetic energy of the particles of reactant decreases

c)

The number of mole per unit volume of particles increases

d)

The activation energy of the reaction decreases

33.

a)

I and II

b)

I and IV

c)

II and III

d)

III and IV

34.

1 mol of alcohol is burnt in excess oxygen.

Which alcohol produces carbon dioxide and water in a mol ratio of 3:4?

a)

Methanol

b)

Ethanol

c)

Propanol

d)

Butanol

35.

A method to control the rusting of underground iron pipelines is through sacrificial protection.

Which of the following is the sacrificial metal?

a)

Copper

b)

Lead

c)

Tin

d)

Zinc

36.
a)

2.24 dm3

b)

1.12 dm3

c)

0.10 dm3

d)

4.48 dm3

37.

a)

CH2O

b)

CHO3

c)

C2HO2

d)

C2H2O3

38.

Which molecule has triple covalent bond between its atom? [Proton number : H = 1, Cl = 17, O = 16, N = 14]

a)

Hydrogen

b)

Chlorine

c)

Nitrogen

d)

Oxygen

39.
a)

dilute hydrochloric acid

b)

concentrated potassium chloride solution

c)

copper(II) chloride solution

d)

concentrated magnesium bromide solution

40.

a)

Use a bigger pure copper

b)

Interchange the terminals in the cell

c)

Increase the concentration of silver nitrate solution

d)

Use silver chloride solution as electrolyte

41.

a)

X,W,Z,Y

b)

X,Z,W,Y

c)

Y,W,Z,X

d)

Y,Z,W,X

42.

a)

I and II only

b)

I and III only

c)

III and IV only

d)

I, II and III only

43.

a)

12.5 cm3

b)

25.0 cm3

c)

50.0 cm3

d)

75.0 cm3

44.

a)

Copper(II) nitrate

b)

Copper(II) oxide

c)

Copper(II) chloride

d)

Copper(II) bromide

45.

a)

A

b)

B

c)

C

d)

D

46.

0.2 mol of zinc powder react with excess dilute hydrochloric acid. After 30 seconds, 0.05 mol of zinc remains as residue.

What is the average rate of the reaction?

a)

1.7 x 10-3 mol s-1

b)

5.0 x 10-3 mol s-1

c)

6.7 x 10-3 mol s-1

d)

8.3 x 10-3 mol s-1

47.
a)

P, Q, R, S

b)

R, P, Q, S

c)

Q, P, R, S

d)

S, P, Q, R

48.

When 50.0 cm3 of 0.5 mol dm-3 silver nitrate solution is added to 50.0 cm3 of 0.5 mol dm-3 sodium chloride solution, temperature of the mixture rises 3.4 oC.

What is the heat released in the experiment?

[Specific heat capacity of solution, c = 4.2 J g-1 oC-1; Density of solution = 1 g cm-3]

a)

1428 J

b)

714 J

c)

61.76 J

d)

2856 J

49.
a)

Carbonic acid

b)

Ethanoic acid

c)

Sulphuric acid

d)

Nitric acid

50.

a)

A

b)

B

c)

C

d)

D

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