The energy needed for substance to initiate reaction is called...
Energy and Rates of Reaction

Quiz
•
Chemistry
•
10th Grade
•
Hard
Ikhlas Imam
Used 19+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Initiation energy
Propagation energy
Activation energy
Enthalpy
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Combustion is one of the most common exothermic reaction. What is the obligatory reactant in combustion reaction?
CO2
H2O
O2
CH4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
From options below, which one is an exothermic reaction?
Photosynthesis
Melting ice cube
Freezing water
Rusting iron
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
When the value of ΔH is negative, which one(s) from below is/are true?
The reaction is fast
The reaction releases energy
It is a combustion reaction
The energy of product is lower than reactant
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Powdered sugar dissolves more easily than rock sugar. Which factor affects this process?
Surface area
Concentration
Temperature
Catalyst
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Iron dissolves faster in warmer acid than colder acid. This happens because...
Warmer acid leads to endothermic reaction
More molecules have enough energy to react
Warm iron are brittle
Solubility of iron in water increase
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Which one(s) from below is/are true for catalyst?
The amount of catalyst will not be reduced when reaction ends
Catalyst makes reaction happens faster
Catalyst increases the activation energy
Catalyst contributed nothing to the reaction
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