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10th Class Chemistry Chapter 15 Water English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
Salt makes the water permanently hard.
Choose an answer
CaSO
4
Ca(HCO
3
)
2
NaHCO
3
NaCO
3
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Question # 2
Water which produces good lather with soap is called.
Choose an answer
Soft water
Hard water
Heavy water
All of them
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Question # 3
One H
2
O molecule can form hydrogen bonding with how many other H
2
O molecules?
Choose an answer
One
Two
Three
Four
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Question # 4
How many percentage to water contains oceans?
Choose an answer
67%
77%
87%
97%
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Question # 5
Chemical formula of hypochlorous acid is.
Choose an answer
HCl
HOCl
H
2
CO
3
HF
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Question # 6
Which one of the following ion does not cause hardness in water?
Choose an answer
Ca
+2
Mg
-2
SO
-2
Na
+
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Question # 7
Which process is responsible for ascending of water in roots:
Choose an answer
evaporation
transpiration
condensation
capillary action
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Question # 8
Temporary hardness is because of .
Choose an answer
Ca(HCO
3
)
2
CaCO
3
MgCO
3
MgSO
4
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Question # 9
The percentage of water in human body is.
Choose an answer
40%
50%
60%
70%
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Question # 10
Industrial effluents are highly
Choose an answer
Toxic organic compounds.
Inorganic salts.
Heavy metals
All of them
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Question # 11
Which disease cause liver inflammation?
Choose an answer
Typhoid
Jaundice
cholera
Hepatitis
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Question # 12
Temporary hardness of water is removed by adding.
Choose an answer
Ca(OH)
2
NaOH
KOH
CaSO
4
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