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CHEMISTRY WITH DAMMY

Total questions: 50

Worksheet time: 30mins

Name
Class
Date
1.

What mass of water is produced when 18 g of hydrogen reacts with excess oxygen?

a)

36 g

b)

162 g

c)

324 g

d)

180 g

2.

How many grams of CO₂ are produced from the complete combustion of 44 g of propane (C₃H₈)?

a)

132 g

b)

88 g

c)

44 g

d)

176 g

3.

If 32 g of methane reacts with oxygen, what mass of water is formed?

a)

72 g

b)

64 g

c)

36 g

d)

18 g

4.

What mass of NaCl is formed when 58.5 g of Na reacts with excess Cl₂?

a)

117 g

b)

58.5 g

c)

29.25 g

d)

146.25 g

5.

How many grams of Fe₂O₃ are produced when 112 g of iron reacts with oxygen?

a)

160 g

b)

112 g

c)

80 g

d)

200 g

6.

How many molecules are in 18 g of water?

a)

6.02 × 10²³

b)

3.01 × 10²³

c)

1.20 × 10²⁴

d)

9.03 × 10²³

7.

How many atoms are in 12 g of carbon?

a)

6.02 × 10²³

b)

3.01 × 10²³

c)

1.20 × 10²⁴

d)

9.03 × 10²³

8.

How many molecules are in 44 g of CO₂?

a)

6.02 × 10²³

b)

1.20 × 10²⁴

c)

3.01 × 10²³

d)

2.20 × 10²⁴

9.

How many atoms are in 2 g of hydrogen gas (H₂)?

a)

6.02 × 10²³

b)

1.20 × 10²⁴

c)

3.01 × 10²³

d)

2.20 × 10²⁴

10.

How many molecules are in 28 g of nitrogen gas (N₂)?

a)

6.02 × 10²³

b)

1.20 × 10²⁴

c)

3.01 × 10²³

d)

2.20 × 10²⁴

11.

What is the relative molecular mass of H₂O?

a)

18

b)

16

c)

20

d)

10

12.

Calculate the relative molecular mass of CO₂.

a)

44

b)

28

c)

32

d)

40

13.

What is the relative molecular mass of NaCl?

a)

58.5

b)

23

c)

35.5

d)

60

14.

Find the relative molecular mass of CH₄.

a)

16

b)

14

c)

12

d)

18

15.

What is the relative molecular mass of H₂SO₄?

a)

98

b)

100

c)

96

d)

94

16.

Which statement best describes the kinetic theory of matter?

a)

All matter is made of atoms that are stationary

b)

Particles in matter are always in motion

c)

Only gases have moving particles

d)

Solids have no particle movement

17.

In which state of matter are particles most tightly packed?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

18.

Which state of matter has particles that move freely and rapidly?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

19.

Which factor increases particle motion in matter?

a)

Decreasing temperature

b)

Increasing pressure

c)

Increasing temperature

d)

Removing heat

20.

What happens to particle movement when a solid is heated?

a)

It decreases

b)

It stops

c)

It increases

d)

It remains constant

21.

What is the process of changing from solid to liquid?

a)

Melting

b)

Freezing

c)

Condensation

d)

Sublimation

22.

What is the change from liquid to gas called?

a)

Evaporation

b)

Melting

c)

Freezing

d)

Condensation

23.

What is the process of gas changing directly to solid?

a)

Sublimation

b)

Deposition

c)

Condensation

d)

Freezing

24.

Which change of state involves heat absorption?

a)

Freezing

b)

Condensation

c)

Melting

d)

Deposition

25.

What is the reverse of evaporation?

a)

Condensation

b)

Sublimation

c)

Melting

d)

Freezing

26.

Which of the following is NOT an assumption of the kinetic theory of gases?

a)

Gas particles have volume

b)

Gas particles move randomly

c)

Collisions are elastic

d)

No forces between particles

27.

What happens to gas pressure when temperature increases at constant volume?

a)

Decreases

b)

Increases

c)

Remains constant

d)

Doubles

28.

Which factor does NOT affect gas pressure?

a)

Volume

b)

Temperature

c)

Mass

d)

Number of particles

29.

What causes pressure in a gas container?

a)

Gravity

b)

Particle collisions

c)

Particle size

d)

Container shape

30.

What happens to gas volume when pressure increases at constant temperature?

a)

Increases

b)

Decreases

c)

Remains constant

d)

Doubles

31.

What is surface tension?

a)

Force acting on gas particles

b)

Force that resists external force on liquid surface

c)

Pressure inside a solid

d)

Energy of vaporization

32.

Which liquid has the highest surface tension?

a)

Alcohol

b)

Water

c)

Mercury

d)

Oil

33.

Surface tension is caused by:

a)

Gravity

b)

Cohesive forces

c)

Adhesive forces

d)

Temperature

34.

Which of the following decreases surface tension?

a)

Cooling

b)

Adding detergent

c)

Increasing pressure

d)

Adding salt

35.

Surface tension allows:

a)

Liquids to boil

b)

Solids to float

c)

Insects to walk on water

d)

Gases to expand

36.

Boyle’s Law states that:

a)

P ∝ T

b)

P ∝ 1/V

c)

V ∝ T

d)

PV = nRT

37.

Charles’ Law relates:

a)

Pressure and volume

b)

Volume and temperature

c)

Pressure and temperature

d)

Volume and mass

38.

What is the formula for the Ideal Gas Law?

a)

PV = nRT

b)

P/T = V

c)

V/T = P

d)

P + V = T

39.

In Boyle’s Law, if pressure doubles, volume:

a)

Doubles

b)

Halves

c)

Triples

d)

Remains constant

40.

In Charles’ Law, if temperature increases, volume:

a)

Decreases

b)

Increases

c)

Remains constant

d)

Doubles

41.

What is the unit of R in the Ideal Gas Equation?

a)

J/mol·K

b)

L·atm/mol·K

c)

Pa·m³/mol·K

d)

N·m/mol·K

42.

A gas occupies 4 L at 2 atm. What volume will it occupy at 1 atm (constant temperature)?

a)

2 L

b)

4 L

c)

8 L

d)

1 L

43.

Evaporation occurs at all temps

a)

True

b)

False

44.

The point at which the of the vibration of a solid's particules overcome the cohesive forces holding it together is known as

a)

Freezing point

b)

Boiling point

c)

melting point

d)

Density

45.

If F ∝ D as F increases D.....

a)

Remains constant

b)

increases also

c)

Decreases

d)

Disolutes

46.

If 1500cm³ of a gas at a certain temp is cooled to half of that temp find volume

a)

5060.33⁰C

b)

6050.23⁰C

c)

900.1⁰C

d)

0⁰C

47.

The pressure at which the rate of evaporation is equal to the rate of condensation is known as.....

a)

Vapour condensation

b)

Saturated vapour condensation

c)

Vapour pressure

d)

Saturated vapour pressure

48.

Convert -15⁰C to kelvin

a)

258K

b)

-258K

c)

358K

d)

-358K

49.

The quantitative relationship implied by chemical reactions is known as.....

a)

Saturation

b)

Stoichiometry

c)

Surface tension

d)

Dissolution

50.

Consider the reaction below : AgNO₃ →x Ag + yNO₂ + zO₂ The values of X,y,z Are

a)

1,1,1

b)

1,2,2

c)

4,4,2

d)

2,2,1

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