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Types of Chemical Reactions

Total questions: 34

Worksheet time: 21mins

Name
Class
Date
1.

Which type of reaction is:

H2 + O2 → H2O

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

2.

Which type of reaction is:

NiCl2 → Ni + Cl2

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

3.

Which type of reaction is:

MgI2 + Br2 → MgBr2 + I

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

4.

Which type of reaction is:

NaCl + AgNO3 → NaNO3 + AgCl

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

5.

Which type of reaction is:

PbCl2 + AgNO3 → Pb(NO3)2 + AgCl

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

6.

Which type of reaction is:

NH3 + HCl → NH4Cl

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

7.

Which type of reaction is:

Al(OH)3 → Al2O3 + H2O

a)

Decomposition

b)

Double replacement

c)

Synthesis

d)

Single replacement

8.

Which type of reaction is:

3Ca + 2AlCl3 --> 3CaCl2 + 2Al

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

9.

In an exothermic reaction, energy is __________.

a)

taken in or absorbed

b)

given out or released

10.

In an endothermic reaction, energy is __________.

a)

taken in or absorbed

b)

given out or released

11.

Which type of chemical reaction is the following chemical formula?

C3H8 + O2 → CO2 + H2OC_3H_{8\ }+\ O_2\ \rightarrow\ CO_2\ +\ H_2O

a)

combustion

b)

decomposition

c)

double replacement

d)

single replacement

e)

synthesis

12.

What type of reaction occurs in a hand warmer?

a)

Exothermic

b)

Endothermic

13.

This graph shows an

a)

endothermic reaction

b)

exothermic reaction

14.

This graph shows an

a)

endothermic reaction

b)

exothermic reaction

15.

In which type of reaction do two or more substances combine to form one new compound?

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

16.

In which type of reactions does one compound break down to form two or more simpler substances?

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

17.

In which type of reaction does one element take the place of another element in a compound?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

18.

In which type of reaction do the ions of two compounds switch places?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

19.

Is ice melting an exothermic or endothermic reaction?

a)

Endothermic

b)

Exothermic

20.

Which type of chemical reaction is the following chemical formula?

C7H14+O2 → CO2 + H2OC_7H_{14}+O_2\ \rightarrow\ CO_2\ +\ H_2O  

a)

combustion

b)

decomposition

c)

double replacement

d)

single replacement

e)

synthesis

21.

A reaction that causes heat to leave a system

a)

Exothermic Reaction

b)

Endothermic Reaction

22.

A reaction where heat enters a system

a)

Exothermic Reaction

b)

Endothermic Reaction

23.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
24.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
25.
Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?
a)
It is an exothermic reaction
b)
It is an endothermic reaction
c)
It is made of ice
d)
It is dissolving your mouth
26.
Number of C's in 2Na₂CO₃
a)
1
b)
2
c)
3
d)
5
27.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0
28.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
29.
How many Chlorine are in MgCl2?
a)
2
b)
1
c)
3
30.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
31.

A chemical reaction always results in...

a)

reactants formed

b)

new product(s) formed

c)

explosions

d)

product(s) being used up

32.

Which of the following is NOT a sign of a chemical reaction?

a)

colour change

b)

heat released

c)

melting

d)

bubbling

33.

Select all factors that can increase the rate of a chemical reaction

a)

temperature

b)

concentration

c)

particle size

d)

catalysts

34.

The rate of a reaction could be sped up by... (select all correct answers)

a)

increasing temperature

b)

decreasing temperature

c)

increasing concentration of reactants

d)

decreasing concentration of reactants

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