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Chemical Reactions and Properties Quiz

Total questions: 59

Worksheet time: 38mins

Name
Class
Date
1.

The reaction of magnesium with air is

a)

Substitution

b)

Endothermic

c)

Reversible

d)

Exothermic

2.

Magnesium ribbon is rubbed before burning because it has a coating of

a)

basic magnesium chloride

b)

basic magnesium sulphide

c)

basic magnesium oxide

d)

basic magnesium carbonate

3.

What chemicals are used in fireworks?

a)

Barium chloride

b)

Copper chloride

c)

Calcium chloride

d)

All of above

4.

The chemical formula of lead sulphate is

a)

PbSO4

b)

Pb2SO4

c)

Pb(SO4)2

d)

Pb2(SO4)3

5.

When a magnesium ribbon is burnt in air, the ash formed is

a)

MgCl2

b)

MgCO3

c)

MgO

d)

MgSO4

6.

Which of the following is a displacement reaction?

a)

Fe + H2O

b)

Na + HCl

c)

Zn + CuSO4

d)

AgNO3 + NaCl

7.

Which of the following are exothermic processes?

a)

Dilution of acid

b)

Reaction of water with quick lime

c)

Both

d)

None

8.

The addition of oxygen to a substance is called

a)

Oxidation

b)

Precipitation

c)

Reduction

d)

Displacement

9.

The process in which energy is given out is

a)

Endothermic

b)

Exothermic

c)

Catalytic

d)

Displacement

10.

Pair of antioxidants added to prevent rancidity is

a)

BHA and H2SO4

b)

BHA and BHT

c)

BHT and NaCl

d)

Na2CO3 and BHA

11.

What is corrosion?

a)

Melting of metals

b)

Addition of oxygen

c)

Process in which metals are eaten up gradually

d)

None

12.

Na2SO4 + BaCl2 → ? + 2NaCl

a)

BaCl4

b)

CaSO4

c)

BaSO4

d)

NaCl2

13.

Which information is not conveyed by a balanced chemical equation?

a)

Chemical formula of products

b)

Amount of substances

c)

Number of atoms

d)

Physical states of reactants

14.

Which of the following is not a physical change?

a)

Chemical reaction

b)

Boiling of water

c)

Melting of ice

d)

Sublimation

15.

Name the process in which metals are gradually destroyed by air or moisture.

a)

Corrosion

b)

Oxidation

c)

Decomposition

d)

Displacement

16.

Precipitation reactions produce insoluble

a)

Gases

b)

Salts

c)

Liquids

d)

Acids

17.

Reaction in which energy is given out is

a)

Substitution

b)

Displacement

c)

Exothermic

d)

Endothermic

18.

What is the product when FeSO4 is heated?

a)

SO2

b)

SO3

c)

Fe2O3

d)

All of above

19.

Identify the type of reaction: Zn + CuSO4 → ZnSO4 + Cu

a)

Displacement

b)

Reduction

c)

Combination

d)

Double Displacement

20.

Which of these is not a type of chemical reaction?

a)

Precipitation

b)

Phase change

c)

Redox

d)

Combination

21.

HCF of 8, 9, 25 is

a)

25

b)

9

c)

8

d)

1

22.

Which of the following is not irrational?

a)

(2 – √3)^2

b)

(√2 + √3)^2

c)

(√2 - √3)(√2 + √3)

d)

$$ \frac{2\sqrt{7}}{7} $$

23.

The product of a rational and irrational number is

a)

irrational

b)

both

c)

rational

d)

none

24.

The sum of a rational and irrational number is

a)

irrational

b)

both

c)

rational

d)

none

25.

The product of two different irrational numbers is always

a)

irrational

b)

rational

c)

both

d)

none

26.

The sum of two irrational numbers is always

a)

rational or irrational

b)

one

c)

rational

d)

irrational

27.

For some integer m, every even integer is of the form

a)

2m

b)

m + 1

c)

m

d)

2m + 1

28.

For some integer q, every odd integer is of the form

a)

2q + 1

b)

2q

c)

q

d)

q + 1

29.

n^2 - 1 is divisible by 8, if n is

a)

an odd integer

b)

a natural number

c)

an integer

d)

an even integer

30.

If the HCF of 65 and 117 is expressible in the form 65m - 117, then the value of m is

a)

4

b)

2

c)

1

d)

3

31.

The largest number which divides 70 and 125, leaving remainders 5 and 8, respectively, is

a)

13

b)

65

c)

5

d)

70

32.

Which of the following is an irrational number?

a)

-0.64

b)

√4

c)

3/8

d)

100

33.

What is the decimal expansion of 8/27?

a)

0.2963

b)

0.296

c)

0.29629

d)

0.296

34.

0.6666…….. in p/q form is

a)

3/5

b)

2/3

c)

6/99

d)

1/66

35.

The value of ((3/2)+(3/2)) is

a)

2

b)

3

c)

4

d)

5

36.

The decimal expansion of √2 is

a)

non-terminating

b)

both

c)

none

d)

terminating

37.

The decimal form of 3/38 is

a)

3.375

b)

3.35

c)

33.75

d)

337.5

38.

Which one is not rational?

a)

-16

b)

0

c)

4

d)

2

39.

Which one is irrational?

a)

√4

b)

100

c)

π

d)

-0.64

40.

Which of these is an example of a combination reaction?

a)

Mg + O2 → MgO

b)

CaO + H2O → Ca(OH)2

c)

CuSO4 + Zn → ZnSO4 + Cu

d)

NaCl → Na + Cl2

41.

What is rancidity?

a)

Fermentation

b)

Spoilage of food due to oxidation

c)

Displacement

d)

Reduction

42.

A balanced chemical equation conveys

a)

Physical state

b)

Mass conservation

c)

Both

d)

None

43.

Redox reaction involves

a)

Neither

b)

Oxidation

c)

Reduction

d)

Both

44.

What is a double displacement reaction?

a)

One element replaces another

b)

Compound forms from elements

c)

None

d)

Two compounds exchange ions

45.

Corrosion affects which metal most?

a)

Gold

b)

Iron

c)

Copper

d)

Platinum

46.

In displacement reaction,

a)

One element replaces another in a compound

b)

Both elements replaced

c)

Energy released

d)

No change

47.

Which gas is released when quick lime reacts with water?

a)

CO2

b)

H2

c)

None

d)

O2

48.

Balancing a chemical equation means

a)

Equal atoms each side

b)

Equal mass

c)

Both

d)

None

49.

Which is not a type of chemical reaction?

a)

Double displacement

b)

Transformation

c)

Combination

d)

Decomposition

50.

Electrolysis produces

a)

New compounds

b)

Elements

c)

Both

d)

None

51.

Which process is NOT exothermic?

a)

Respiration

b)

Melting ice

c)

Combustion

d)

Neutralization

52.

Which is the correct formula for water?

a)

H2

b)

HO

c)

HO2

d)

H2O

53.

When ZnSO4 reacts with NaCl, the product is

a)

Na2SO4

b)

Both

c)

ZnCl2

d)

None

54.

Which is endothermic?

a)

Respiration

b)

Combustion

c)

Photosynthesis

d)

Neutralization

55.

Lime water is

a)

CaCO3

b)

Ca(OH)2

c)

Ca

d)

CaO

56.

Which shows oxidation?

a)

Gain of oxygen

b)

Loss of hydrogen

c)

Both

d)

None

57.

What is the HCF of 12, 15, and 21?

a)

1

b)

3

c)

12

d)

6

58.

Which of the following is an example of an endothermic reaction?

a)

Combustion

b)

Photosynthesis

c)

Respiration

d)

Rusting

59.

Which of the following represents a combination reaction?

a)

2H2 + O2 → 2H2O

b)

CaCO3 → CaO + CO2

c)

Na + Cl2 → NaCl

d)

Fe + CuSO4 → FeSO4 + Cu

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