Free Printable Revision Chapter 3 (Chemistry)

1.

Is the Relative Atomic Mass the actual mass of an atom?

a)

Yes

b)

No

2.

Which atom was originally used as the standard for Relative Atomic Mass (RAM)?

a)

Boron atom

b)

Hydrogen atom

c)

Aluminum atom

d)

Oxygen atom

3.

Why was Hydrogen rejected as standard of Relative Atomic Mass?

a)

Hydrogen has only abundance of 1%

b)

It has no reaction with most elements

c)

It is a gas at room temperature

d)

It is the lightest element

4.

What atom is the current standard for Relative Atomic Mass (RAM)?

a)

Carbon-13

b)

Carbon-14

c)

Carbon-12

5.

The diagram shows the electron arrangement of isotope X. Isotope X is the current standard of Relative Atomic Mass

Why is X chosen as standard of Relative Atomic Mass?

a)

Isotope X has abundance of 1%

b)

It is solid at room temperature

c)

Combines easily with other elements

d)

It is the lightest element

6.

What is the Relative atomic mass of Magnesium Nitrate, $Mg\left(NO_3\right)_{_2}$

(Ar: Mg=24, N=14, O=16)

a)

148

b)

125

c)

149

d)

110

7.

What is the Relative atomic mass of Carbon Dioxide, $CO_2$

(Ar: C= 12 ,O=16)

a)

54

b)

44

c)

45

d)

89

8.

How many times heavier of 5 bromine atoms to 3 calcium atoms?

a)

$\frac{14}{5}$

b)

$\frac{7}{4}$

c)

$\frac{10}{3}$

d)

$\frac{5}{2}$

9.

Calculate how many copper atoms are 5 times than 4 Sulphur atoms?

a)

10

b)

11

c)

15

d)

12

10.

What is the Avogadro constant ( $N_a$ )?

a)

$6.002\times10^{23}$

b)

$6.02\times10^{23}$

c)

$6.02\times10^{25}$

d)

$5.2\times10^{23}$

11.

True or False

The Avogadro constant is named after a famous Italian scientist, Amedeo Avogrdro

a)

True

b)

False

12.

True or False

One mole is the quantity of substances containing the same number of atoms in 11g of Carbon-12 which is $6.02\times10^{23}$

a)

True

b)

False

13.

Calculate the no. of atoms of 1 mol of Zinc

a)

$6\times10^{23}$

b)

$6.02\times10^{23}$

c)

$6.02\times10^{24}$

d)

$5\times10^{23}$

14.

Calculate no. of atoms of 0.4 mol of glucose, $C_6H_{12}O_6$

a)

$5.7742\times10^{21}$

b)

$5.7792\times10^{24}$

c)

$5.7792\times10^{23}$

d)

$5.5742\times10^{23}$

15.

Calculate the no. of moles of $3.01\times10^{22}$ magnesium atom

a)

0.08 mol

b)

0.05 mol

c)

0.07 mol

d)

0.06 mol

16.

The diagram shows table salt also known as Sodium chloride, $NaCl$

What is the molar mass of Sodium chloride?

(Ar: Na=23, Cl=35.5)

a)

$56.5\ g\ mol^{-1}$

b)

$58.5\ g\ mol^{-1}$

c)

$5.85\ g\ mol^{-1}$

d)

$48.5\ g\ mol^{-1}$

17.

0.25 mol of water is put into a beaker for an experiment.

How many grams of water is put into the beaker?

a)

4.7g

b)

4.5g

c)

4.8g

d)

5g

18.

How many moles of molecules are found in 40g of sulphur dioxide gas, $SO_2$

(Ar: O=16, S=32)

a)

0.526 mol

b)

0.625 mol

c)

0.5 mol

d)

6.25 mol

19.

True or False

$1\ dm^3$ is equal to $2000\ cm^3$

a)

True

b)

False

20.

True or False

Room condition refers to the condition where the temperature is at 25 C and pressure of 1 atm

a)

True

b)

False

21.

What does STP stand for?

STP stands for standard (a) and pressure

22.

What are the conditions of STP?

a)

Temperature is at 0 C

b)

Temperature is at 25 C

c)

Molar volume is $24\ dm^3$

d)

Molar volume is $22.4\ dm^3$

23.

Calculate the no. of moles of $600\ cm^3$ $O_2$ gas at room condition

a)

0.028 mol

b)

0.025 mol

c)

0.027 mol

d)

0.024 mol

24.

Calculate volume of 0.6 mol of hydrogen gas at STP

a)

$15.44\ dm^3$

b)

$13.44\ dm^3$

c)

$14.4\ dm^3$

d)

$1.344\ dm^3$

25.

Calculate the atoms of $224\ cm^3$ of carbon dioxide gas at STP

a)

$1.608\times10^{22}$

b)

$1.806\times10^{22}$

c)

$18.06\times10^{22}$

d)

$1.806\times10^{23}$

26.

Calculate mass of $360\ cm^3$ of ammonia gas, $NH_3$ at room condition

(Ar: H=1, N=14)

a)

$0.25\ g\ mol^{-1}$

b)

$0.255\ g\ mol^{-1}$

c)

$22.5\ g\ mol^{-1}$

d)

$2.55\ g\ mol^{-1}$

27.

True or False

Chemical formula is a representation of a chemical substance using alphabets to represent the atoms and subscript numbers to show the numbers of each type of atoms found in the elementary entities of the substance

a)

True

b)

False

28.

Fill in the blank

The empirical formula is the chemical formula that shows the (a) ratio of the number of atoms of each element in a compound

29.

What chemical formula show the actual number of atoms of each element found in a molecule of a compound.

a)

Empirical Formula

b)

Molecular Formula

30.

Through an experiment, students found out that the formula for benzene is $C_6H_6$

What is the empirical formula for benzene?

a)

$C_2H$

b)

$CH$

c)

$C_2H_2$

d)

$CH_2$

31.

Compound Z has an empirical formula of $CH_2O$ . Determine the molecular formula of compound Z

(RMM: 180)

a)

$C_6H_{12}O_6$

b)

$C_4H_8O_4$

c)

$C_8H_{16}O_8$

d)

$C_{12}H_6O_{12}$

32.

State the formula the following compound

Sodium Chloride

a)

$Na_2Cl$

b)

$NaCl$

c)

$NaCl_2$

d)

$Na_2Cl_2$

33.

State the formula the following compound

Lithium Sulphate

a)

$LiSO_4$

b)

$Li_2SO_2$

c)

$Li_2SO_4$

d)

$LiSO$

34.

State the formula the following compound

Zinc Nitrate

a)

$Zn\left(NO_2\right)_2$

b)

$Zn\left(NO_3\right)_4$

c)

$Zn\left(NO_4\right)_2$

d)

$Zn\left(NO_3\right)_2$

35.

Name the following compound

$ZnO$

a)

Silver oxide

b)

Zinc oxide

c)

Lithium oxide

d)

Calcium Carbonate

36.

Name the following compound

$PbCl_2$

a)

Lead (II) chloride

b)

Lead (I) chloride

c)

Chloride (II) lead

d)

Phosphorus dichloride

37.

Name the following compound

$Ba\left(OH\right)_2$

a)

Barium Sulphate

b)

Barium Oxide

c)

Barium Hydroxide

d)

Barium Dihydroxide

38.

Write the formula of the compound

Carbon dioxide

a)

$CO_4$

b)

$CO^{ }$

c)

$CO_2$

d)

$CO_3$

39.

Name the following compound

$SO_4$

a)

Sulphur monoxide

b)

Sulphur dioxide

c)

Sulphur trioxide

d)

Sulphur tetroxide

40.

Name the following compound

$HBr$

a)

Hydrogen tribromide

b)

Hydrogen bromide

c)

Hydrogen monobromide

d)

Hydrogen dibromide

Revision Chapter 3 (Chemistry)

Total questions: 40

Worksheet time: 22mins

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