wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

chemical reaction and equations

Total questions: 120

Worksheet time: 1hrs 12mins

Name
Class
Date
1.
Which of the following are exothermic processes? (i) Reaction of water with quick lime (ii) Dilution of an acid(iii) Evaporation of water (iv) Sublimation of camphor (crystals)
a)
(i) and (ii)
b)
(ii) and (iii)
c)
(i) and (iv)
d)
(iii) and (iv)
2.
Which among the following is(are) double displacement reaction(s)?(i) Pb + CuCl2 → PbCl2 + Cu (ii) Na2SO4 + BaCl2 → BaSO4 + 2NaCl (iii) C + O2 → CO2 (iv) CH4 + 2O2 → CO2 + 2H2O
a)
(i) and (iv)
b)
(ii) only
c)
(i) and (ii)
d)
(iii) and (iv)
3.
Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?(i) Displacement reaction (ii) Precipitation reaction (iii) Combination reaction (iv) Double displacement reaction
a)
(a) (i) only
b)
(b) (ii) only
c)
(c) (iv) only
d)
(d) (ii) and (iv)
4.
Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is
a)
(a) 1:1
b)
(b) 2:1
c)
(c) 4:1
d)
(d) 1:2
5.
In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?
a)
(a) Lead sulphate (insoluble)
b)
(b) Lead acetate
c)
(c) Ammonium nitrate
d)
(d) Potassium sulphate
6.
Copper chloride and aluminum react to produce aluminum chloride and copper.  Which of the following is the correctly balanced chemical equation for this reaction?
a)
CuCl2 + Al -> AlCl3 + Cu
b)
3CuCl2 + Al -> AlCl3 + 2Cu
c)
3CuCl2 + 2Al -> 2AlCl3 + 3Cu
d)
CuCl2 + 3Al -> AlCl3 + 2Cu
7.
Which observation would most likely indicate that an exothermic reaction has occurred?
a)
a color change
b)
the production of gas bubbles
c)
an increase in temperature
d)
a decrease in temperature
8.

When I want to balance a chemical equation, this is the only number that I can change.

a)

Subscript

b)

Coefficient

c)

Elemental Symbol

d)

Yields

9.

When I want to balance a chemical equation, this is the only number that I can change.

a)

Subscript

b)

Coefficient

c)

Elemental Symbol

d)

Yields

10.

CaO + H2O --> Ca(OH)2

This is an example of

a)

Combination reaction

b)

Decomposition reaction

c)

Displacement reaction

d)

None of the above

11.

Assertion: AgBr is used on photographic and X – ray film.

Reason: AgBr is photosensitive and changes to Ag and bromine in presence of sunlight and undergoes decomposition reaction.

a)

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

b)

The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.

c)

Assertion is true but the reason is false.

d)

The statement of the Assertion is false but the Reason is true.

12.
During a lab experiment, a scientist numbers three beakers. Next, she pours 150 mL of  liquid into each beaker. Each liquid is different.Then, the scientist adds 5 g of white solid baking soda (NaHCO3) to each beaker and stirs. She observes the results.
In which of the beakers does the scientist observe clear evidence of a chemical reaction?
a)
beaker 1 only
b)
beaker 2 only
c)
beaker 3 only
d)
beakers 1,2, and 3
13.
Which of the following is a chemical reaction?
a)
Water freezes.
b)
Sugar dissolves in water.
c)
Salt and pepper are mixed in a dish.
d)
Iron rusts.
14.
When two substances were combined, bubbles were produced and the temperature dropped.  This most likely means that:
a)
a chemical reaction took place
b)
the two substances had low boiling points
c)
one substance dissolved in the other
d)
the two substances are non-reactive
15.
Before a chemical reaction, the total mass of two reactants is measured to be 40 grams.  After the reaction, what should be the total mass of the products?
a)
0 grams
b)
20 grams
c)
40 grams
d)
80 grams
16.
Copper chloride and aluminum react to produce aluminum chloride and copper.  Which of the following is the correctly balanced chemical equation for this reaction?
a)
CuCl2 + Al -> AlCl3 + Cu
b)
3CuCl2 + Al -> AlCl3 + 2Cu
c)
3CuCl2 + 2Al -> 2AlCl3 + 3Cu
d)
CuCl2 + 3Al -> AlCl3 + 2Cu
17.
Which observation would most likely indicate that an exothermic reaction has occurred?
a)
a color change
b)
the production of gas bubbles
c)
an increase in temperature
d)
a decrease in temperature
18.
The first part of a balanced chemical equation is shown:  H2SO4 + 2NaOH → ________.  In order for this equation to be balanced, how many hydrogen (H) atoms must be present in the products?
a)
2
b)
3
c)
4
d)
5
19.
Suppose two substances were combined together in a beaker. You know that a chemical reaction occurred if:
a)
new substances were created.
b)
one substance dissolved in the other.
c)
one substance melted in the other.
d)
 the two substances remained separate.
20.
All of the following are indicators of a chemical reaction except one.  Which one is NOT an indicator that a chemical reaction has taken place?
a)
he production of heat or light
b)
a color change
c)
the production of gas bubbles
d)
the dissolving of one substance in another
21.
 The idea that matter is neither created nor destroyed in chemical reactions is known as the:
a)
 The idea that matter is neither created nor destroyed in chemical reactions is known as the:
b)
law of conservation of energy.
c)
 law of conservation of mass.
d)
second law of thermodynamics.
22.
 The idea that matter is neither created nor destroyed in chemical reactions is known as the:
a)
 The idea that matter is neither created nor destroyed in chemical reactions is known as the:
b)
law of conservation of energy.
c)
 law of conservation of mass.
d)
second law of thermodynamics.
23.
A teacher writes the equation representing the chemical reaction between hydrochloric acid and sodium on the board.HCl + Na → NaCl + H2The teacher states that the equation has not been balanced. Which of these correctly shows the products of this reaction after the equation has been balanced?
a)
Na2Cl + H2
b)
 2NaCl + H2
c)
NaCl + 2H2
d)
 2NaCl + 2H2
24.
The law of conservation of matter states that:
a)
matter is neither created nor destroyed.
b)
the mass of the products is always greater than the mass of the reactants.
c)
 the mass of the products is always less than the mass of the reactants.
d)
matter is always converted into an equal amount of energy.
25.
A balanced chemical equation is one in which:
a)
the number of atoms of each element is the same in both the reactants and the products.
b)
the same compounds are present in both the reactants and the products.
c)
the reactants and the products have equal densities.
d)
 the reactants and the products have equal volumes.
26.
Which observation would most likely indicate that an endothermic reaction has occurred?
a)
a color change
b)
the production of gas bubbles
c)
an increase in temperature
d)
 a decrease in temperature
27.
Suppose the mass of two reactants totals 10 grams.  After the chemical reaction, what should be the total mass of the products?
a)
0 grams
b)
5 grams
c)
10 grams
d)
20 grams
28.
The first part of a balanced chemical equation is shown:  Cu + 2AgNO3 → ________.  In order for this equation to be balanced, how many oxygen (O) atoms must be present in the products?
a)
2
b)
3
c)
5
d)
6
29.
Which of the following is a chemical reaction?
a)
ice melts
b)
water evaporates
c)
salt dissolves in water
d)
wood burns
30.
The first part of a balanced chemical equation is shown:  H2SO4 + 2NaOH → ________.  In order for this equation to be balanced, how many hydrogen (H) atoms must be present in the products?
a)
2
b)
3
c)
4
d)
5
31.
A teacher writes the equation representing the chemical reaction between hydrochloric acid and sodium on the board.HCl + Na → NaCl + H2The teacher states that the equation has not been balanced. Which of these correctly shows the products of this reaction after the equation has been balanced?
a)
Na2Cl + H2
b)
 2NaCl + H2
c)
NaCl + 2H2
d)
 2NaCl + 2H2
32.
The following reaction is an example of a 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)(i) displacement reaction (ii) combination reaction (iii) redox reaction (iv) neutralisation reaction
a)
(i) and (iv)
b)
(ii) and (iii)
c)
(i) and (iii)
d)
(iii) and (iv)
33.
Which of the following statements about the given reaction are correct?3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g)(i) Iron metal is getting oxidised (ii) Water is getting reduced (iii) Water is acting as reducing agent (iv) Water is acting as oxidising agent
a)
(i), (ii) and (iii)
b)
(iii) and (iv)
c)
(i), (ii) and (iv)
d)
(ii) and (iv)
34.
Which among the following is(are) double displacement reaction(s)?(i) Pb + CuCl2 → PbCl2 + Cu (ii) Na2SO4 + BaCl2 → BaSO4 + 2NaCl (iii) C + O2 → CO2 (iv) CH4 + 2O2 → CO2 + 2H2O
a)
(i) and (iv)
b)
(ii) only
c)
(i) and (ii)
d)
(iii) and (iv)
35.
Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is
a)
(a) 1:1
b)
(b) 2:1
c)
(c) 4:1
d)
(d) 1:2
36.
Which of the following are combination reactions?(i) 2KClO3⎯Heat⎯→ 2KCl + 3O2 (ii) MgO + H2O ⎯→ Mg(OH)2 (iii) 4Al + 3O2 ⎯→ 2Al2 O3 (iv) Zn + FeSO4 → ZnSO4 + Fe
a)
(a) (i) and (iii)
b)
(b) (iii) and (iv)
c)
(c) (ii) and (iv)
d)
(d) (ii) and (iii)
37.
Which of the following reactions is balanced?
a)
2CH4 + O2 -> CO2 + H2O
b)
CH4 + 2O2 -> CO2 + H2O
c)
CH4 + 2O2 -> CO2 + 2H2O
d)
None of the chemical equations are balanced.
38.

Chemical formula of lime water is :

a)

CaO

b)

Ca(OH)2

c)

CaCO3

d)

CO2

39.

Silver article turns black when kept in open for a few days due to formation of

a)

H2S

b)

AgS

c)

AgSO4

d)

Ag2S

40.

The reaction in which two compound exchange their ions to form two new compounds is called

a)

displacement reaction

b)

combination reaction

c)

redox reaction

d)

double displacement reaction

41.

The chemical formula of lead sulphate is :

a)

Pb2SO4

b)

Pb(SO4)2

c)

PbSO4

d)

Pb2(SO4)3

42.

7.The equation

Cu + xHNO3 -> Cu(NO3)2 + yNO2 + 2H2O

The values of x and y are

a)

3 and 5

b)

8 and 6

c)

4 and 2

d)

7 and 1

43.

White silver chloride in sunlight turns to :

a)

Grey

b)

Yellow

c)

Remain white

d)

Red

44.

Heating of ferrous sulphate gives which of the following product?

a)

Ferric oxide

b)

Sulphur dioxide

c)

Sulphur trioxide

d)

All the above

45.

These are all models of the same molecule. What would this molecule look like in a chemical/molecular formula?

a)

CH

b)

C4H

c)

CH4

d)

4CH

46.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
47.
Is the following equation balanced?...
Al + O2 --> 2Al2O3
a)
Yes!
b)
No!
48.

Which of the following chemical equations follows the Law of Conservation of Mass? Hint: which is balanced?

a)

CO2 + H2O --> C6H12O6 + O2

b)

C6O + H12O --> C6H12O2

c)

CO2 + H2O --> C6H12O6 + O2

d)

CO2 +H2O --> C6H12O6 +O2

49.

For an investigation a student poured a blue solution of CuSO4 into a beaker. The student placed a shiny, silver-colored strip of zinc metal in the solution and wrote down the changes. Which change shows that a CHEMICAL REACTION took place?

a)

A dark solid (precipitate) formed on the zinc metal.

b)

The zinc metal stayed silver-colored and shiny

c)

The CuSO4 solution evaporated after the zinc metal was added.

d)

None of these

50.

Chemical formula of quick lime is :

a)

CaO

b)

Ca(OH)2

c)

CaCO3

d)

CO2

51.

Silver article turns black when kept in open for a few days due to formation of

a)

H2S

b)

AgS

c)

AgSO4

d)

Ag2S

52.

A chemical equation should be balanced to :

a)

show conservation of energy

b)

show conservation of mass

c)

to make equation attractive

d)

All of the above

53.

In which of the following process a chemical reaction has taken place?

a)

Ice melts into water

b)

A wet shirt got dried in sunlight

c)

A brown layer is formed over iron rod kept in air

d)

sugar getting dissolved in water

54.

Which of the following is not a chemical reaction ?

a)

Formation of salt solution

b)

Milk turns sour in hot weather

c)

Burning of match stick

d)

Contamination of food

55.

An unbalanced chemical equation is written in :

a)

Simple form

b)

Proper form

c)

Unorganized form

d)

Skeletal form

56.

The reaction in which two compound exchange their ions to form two new compounds is called

a)

displacement reaction

b)

combination reaction

c)

redox reaction

d)

double displacement reaction

57.

Which of the following gases can be used for storage of fresh sampel of an oil for a long time?

a)

Carbon dioxide or oxygen

b)

Nitrogen or helium

c)

Helium or oxygen

d)

Nitrogen or oxygen

58.

The chemical formula of lead sulphate is :

a)

Pb2SO4

b)

Pb(SO4)2

c)

PbSO4

d)

Pb2(SO4)3

59.

Which of the following reactions involves the combination of two elements :-

a)

CaO + CO2 -> CaCO3

b)

4Na + O2 -> 2Na2O

c)

SO2 +(1/2)O2 -> SO3

d)

NH3 + HCI -> NH4CI

60.

Which of the following reactions involves the combination of two elements :-

a)

CaO + CO2 -> CaCO3

b)

4Na + O2 -> 2Na2O

c)

SO2 +(1/2)O2 -> SO3

d)

NH3 + HCI -> NH4CI

61.

3.What happens when copper rod is dipped in iron sulphate solution :-

a)

Copper displaces iron

b)

Blue color of copper sulphate solution is obtained

c)

No reaction takes place

d)

Reaction is exothermic

62.

7.The equation

Cu + xHNO3 -> Cu(NO3)2 + yNO2 + 2H2O

The values of x and y are

a)

3 and 5

b)

8 and 6

c)

4 and 2

d)

7 and 1

63.

In the following equation:

Na2CO3 + xHCI -> 2NaCI +CO2 + H2O, the value of x is

a)

1

b)

2

c)

3

d)

4

64.

White silver chloride in sunlight turns to :

a)

Grey

b)

Yellow

c)

Remain white

d)

Red

65.

Which of the following does not corrode when exposed to the atmosphere-

a)

Fe

b)

Cu

c)

Au

d)

Ag

66.

Black and white photography uses

a)

Decomposition of silver chloride

b)

Decomposition of silver bromide

c)

Both

d)

None of these

67.

Rusting of an iron is an example of :

a)

Reduction

b)

Ionization

c)

Oxidation

d)

Dissociation

68.

A redox reaction is one in which :

a)

Both the substance are reduced

b)

Both the substance are oxidized

c)

An acid is neutralized by the base

d)

One substance is oxidized while the other is reduced

69.

Which of the following product is formed when calcium oxide reacts with water?

a)

Slaked lime

b)

Carbon dioxide

c)

Calcium oxide

d)

Oxygen gas

70.

Heating of ferrous sulphate gives which of the following product?

a)

Ferric oxide

b)

Sulphur dioxide

c)

Sulphur trioxide

d)

All the above

71.

Heating of ferrous sulphate gives which of the following product?

a)

Ferric oxide

b)

Sulphur dioxide

c)

Sulphur trioxide

d)

All the above

72.

The following is an example of :

4NH3 + 5O2 -----> 4NO + 6H2O

(i) displacement reaction

(ii) combustion reaction

(iii) redox reaction

(iv) neutralization reaction

a)

(i) and (iv)

b)

(ii) and (iii)

c)

(i) and (ii)

d)

(iii) and (iv)

73.

The electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water

a)

1:1

b)

2:1

c)

4:1

d)

1:2

74.

Which of the following processes involve chemical reactions

a)

Storing of oxygen gas under pressure in a gas cylinder

b)

Liquification of air

c)

Keeping petrol in a china dish in open

d)

Heating copper wire in the presence of air at high temperature

75.

Identify the type of reaction :

Iron nails when left dipped in blue copper sulphate solution become brownish in colour and the blue colour of copper sulphate fades away.

(a)  

76.

What is the formula of magnesium nitride?

a)

MgN3

b)

Mg2N3

c)

Mg3N2

d)

Mg2N

77.

What are the products of decomposition of PbCO3

a)

PbO + CO2

b)

Pb + CO2 + O2

c)

PbO + C

d)

Pb + C + O2

78.

What are the products of decomposition of PbCO3

a)

PbO + CO2

b)

Pb + CO2 + O2

c)

PbO + C

d)

Pb + C + O2

79.

A metal 'M' reacts with an acid according to the equation :

M + H+ --------> M3+ + H2

The metal can be

a)

Potassium

b)

Magnesium

c)

Aluminium

d)

Barium

80.

A metal 'M' reacts with an acid according to the equation :

M + H+ --------> M3+ + H2

The metal can be

a)

Potassium

b)

Magnesium

c)

Aluminium

d)

Barium

81.

When dil. sulphuric acid is added to pieces of iron sulphie, hydrogen sulphide gas is produced and soluble ferrous sulphate is produced. The type of chemical reaction involved is :

a)

Decomposition reaction

b)

Combination reaction

c)

Displacement Reaction

d)

Double displacement reaction

82.

When ethane reacts with oxygen present in air it produces CO2 and water. In this reaction how many moles of oxygen is used?

a)

3

b)

5/2

c)

2

d)

7/2

83.

A powdered salt X was heated in a dry test tube and evolution of brown fumes of nitrogen dioxide and a yellow residue of lead oxide is formed. The salt X is :

a)

Magnesium Carbonate

b)

Lead nitrate

c)

Ammonium Sulphate

d)

Calcium carbonate

84.

Which of the following is not a type of reduction

a)

Gain of hydrogen

b)

loss of electron

c)

loss of oxygen

d)

gain of electron

85.

Reaction of Na and H2O gives a very strong base , NaOH and another product, a gas. How do you test for this gas ?

a)

Pass it through lime water, turns milky.

b)

Rotten egg smell

c)

Burns with a dazzling flame

d)

Burns with a pop sound

86.

Which of the following is endothermic reaction?

a)

Dissolution of ammonium chloride in water

b)

Dilution of sulphuric acid

c)

Dissolution of sodium hydroxide in water

d)

Reaction of zinc with HCl

87.

Which of the following is not a physical change?

a)

Boiling of water to give water vapour

b)

Melting of ice to give water

c)

Dissolution of salt in water

d)

combustion of Liquefied Petroleum Gas (LPG)

88.

Which of the following gases can be used for storage of fresh sample of an oil for a long time?

a)

carbon dioxide or oxygen

b)

nitrogen or oxygen

c)

carbon dioxide or helium

d)

helium or nitrogen

89.

Which of the following gases can be used for storage of fresh sample of an oil for a long time?

a)

carbon dioxide or oxygen

b)

nitrogen or oxygen

c)

carbon dioxide or helium

d)

helium or nitrogen

90.

The respiration process during which glucose undergoes slow combustion by combining with oxygen in the cells of our body to produce energy, is a kind of

a)

Exothermic process

b)

Endothermic process

c)

Reversible process

d)

Physical process

91.

One of the following processes does not involve a chemical reaction. That is:

a)

Melting of candle wax when heated

b)

Burning of candle wax when heated

c)

Digestion of food

d)

Ripening of banana

92.

The neutralization reaction between an acid and a base is a type of:

a)

Double displacement reaction

b)

Displacement reaction

c)

Addition reaction

d)

Decomposition reaction

93.

Rusting of iron involves a chemical reaction which is a combination of:

a)

Reduction as well as combination reactions

b)

Oxidation as well as combination reactions

c)

Reduction as well as displacement reactions

d)

Oxidation as well as displacement reactions

94.

Oxidation is a process which involves

a)

addition of oxygen

b)

addition of hydrogen

c)

removal of oxygen

d)

removal of hydrogen

95.

A substance added to food containing fats and oils is called:

a)

Oxidant

b)

Rancid

c)

Coolant

d)

Antioxidant

96.

The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called

a)

Reduction

b)

Rancidity

c)

Corrosion

d)

Antioxidation

97.

Pb + CuCl2 → PbCl2 + Cu

The above reaction is an example of:

a)

Combination

b)

Double displacement

c)

Decomposition

d)

Displacement

98.

What breaks during a chemical reaction?

a)

glass

b)

bonds

c)

molecules

d)

atoms

99.

How do you know a chemical reaction has occured?

a)

Properties of the materials change.

b)

Energy in the system changes.

c)

Both A & B are correct.

d)

Neither A nor B are correct

100.

A substance which oxidises itself and reduces other is known as -

a)

oxidising agent

b)

reducing agent

c)

both of these

d)

none of these

101.

which of the following is a physical change?

a)

formation of curd from milk

b)

ripening of fruits

c)

Getting salt from sea water

d)

Burning of wood

102.

What happens when copper rod is dipped in iron sulphate solution?

a)

Copper displaces iron

b)

Blue colour of copper sulphate solution is obtained

c)

No reaction takes place

d)

Reaction is exothermic

103.

A student added dilute HCl to a test tube containing zinc granules and made following observations:

a)

the zinc surface became dull and black

b)

a gas evolved which burnt with a pop sound

c)

the solution remained colourless

d)

the solution becomes green in colour

104.

Zn + H2SO4 --------> ZnSO4 + H2

Above reaction is -

a)

decomposition reaction

b)

single displacement reaction

c)

combination reaction

d)

synthesis reaction

105.

The reaction in which two compounds exchange their ions to form two new compounds is -

a)

a displacement reaction

b)

a decomposition reaction

c)

an isomerization reaction

d)

a double displacement reactions

106.

A redox reaction is one in which-

a)

both the substance are reducedc

b)

both the substance are oxidised

c)

an acid is neutralilsed by the base

d)

one substance is oxidised while the other is reduced

107.

In the equation, NaOH + HNO3 ------> NaNO3 + H2O nitric acid is acting as-

a)

An Oxidising agent

b)

an acid

c)

a nitrating agent

d)

a dehydrating agent

108.

A redox reaction is one in which-

a)

both the substance are reducedc

b)

both the substance are oxidised

c)

an acid is neutralilsed by the base

d)

one substance is oxidised while the other is reduced

109.

White silver chloride in sunlight turns to-

a)

grey

b)

yellow

c)

remain white

d)

red

110.

Black and white photography uses-

a)

decomposition of silver chloride

b)

decomposition of silver bromide

c)

both

d)

none of these

111.

When copper powder is heated it gets coated with-

a)

black copper oxide

b)

yellow copper oxide

c)

red copper oxide

d)

None of these

112.

Combination of phosphorus and oxygen is an example of -

a)

oxidation

b)

reduction

c)

rancidity

d)

None of these

113.
How many oxygen atoms are present in the following? 
4Ca(OH)2
a)
4
b)
6
c)
8
d)
1
114.
Why must we balance chemical equations? 
a)
Our teacher said so
b)
to abide by the law of conservation of energy
c)
to abide by the law of conservation of mass
115.
What is changed in a chemical reaction like this one? 
NaOH + HCl   →  NaCl + H2O
a)
the number of atoms is changed
b)
molecules and compounds are changed 
c)
atoms are changed
d)
elements are changed 
116.
Which of the following is true? 
a)
Na is a gas
b)
Cl combusts when put in water
c)
NaCl is very different than Na and Cl
d)
Cl is a metal
117.
How many E atoms are there in this silly formula?
2E2Fg3Hi4
a)
4
b)
2
c)
1
d)
3
118.
Which of the following can be broken apart in a chemical reaction? 
a)
Noble gases
b)
Molecules and compounds
c)
only molecules
d)
only compounds 
119.
 Fill in the blank to balance the chemical equation. 
2KI  +  ____Cl2 →  2KCl  +  I2
a)
1
b)
2
c)
3
d)
4
120.
What coefficient should go in the blank space to balance the chemical equation? 
2Al  +____  HCl   →    2AlCl3  +  3H2
a)
2
b)
4
c)
3
d)
6

Similar Resources on Wayground

Medical Term/ Word Parts

115 questions

Medical Term/ Word Parts

quiz

Worksheet

•

10th - 12th Grade

Savvas Physical Sci Unit 3 Energy, Motion, Force, and Work

115 questions

Savvas Physical Sci Unit 3 Energy, Motion, Force, and Work

quiz

Worksheet

•

8th - 11th Grade

7.5 Molecular Geometry Bank

122 questions

7.5 Molecular Geometry Bank

quiz

Worksheet

•

10th - 12th Grade

Semester 1 2020 environmental science exam

115 questions

Semester 1 2020 environmental science exam

quiz

Worksheet

•

9th - 12th Grade

Cell cycle and Mitosis Review

118 questions

Cell cycle and Mitosis Review

quiz

Worksheet

•

9th - 12th Grade

Muscular System Pre-Assessment

117 questions

Muscular System Pre-Assessment

quiz

Worksheet

•

9th - 12th Grade

HPS Unit 5 & 6 Test

122 questions

HPS Unit 5 & 6 Test

quiz

Worksheet

•

9th - 12th Grade