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Bond Energy(General Knowledge > General Science ) Questions and Answers
Home
Topic
General Knowledge
General Science
Bond Energy
Question 1.
Which is an example of an endothermic physical reaction?
Ice melting
Combustion
Steam condensing
Photosynthesis
Explanation:-
Answer: Option A. ->
Ice melting
Question 2.
How many electrons are shared in one chemical bond?
2
4
6
8
Explanation:-
Answer: Option A. ->
2
Question 3.
How can we figure out if an overall reaction is endo- or exo-thermic? It is the difference between _______ and __________
hot and cold temperatures
energy to break and energy to form bonds.
time to form a bond versus time to break a bond
None of these
Explanation:-
Answer: Option B. ->
energy to break and energy to form bonds.
Question 4.
How many valence electrons do most electrons want in their valence shell to be stable? (Except hydrogen!)
2
4
6
8
Explanation:-
Answer: Option D. ->
8
Question 5.
When bonds are _________, energy is released
formed
exothermic
Both A & B
All of above
Explanation:-
Answer: Option A. ->
formed
Question 6.
True or false: when bonds are broken the energy is positive because energy goes into the system
True
False
Explanation:-
Answer: Option A. ->
True
Question 7.
This is the number of years that Kuppler has been teaching at Kingsway:
3 years
5 years
9 years
10 years
Explanation:-
Answer: Option C. ->
9 years
Question 8.
Which statements about exothermic reactions are correct?I
I and II only
I and III only
II and III only
I, II, and III
Explanation:-
Answer: Option D. ->
I, II, and III
Question 9.
What kind of energy change happens in the photosynthesis reaction in plant leaves?
Endothermic
Exothermic
No change
Both A & B
Explanation:-
Answer: Option A. ->
Endothermic
Question 10.
How can you determine an atom's valence electrons?
the column on the periodic table
the row on the periodic table
the atomic number
the atomic mass
Explanation:-
Answer: Option A. ->
the column on the periodic table
1
2
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