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10th Class Chemistry Chapter 15 Water English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
Water become hard because of:
Choose an answer
Ca+2
Mg+2
SO-24
all of these
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Question # 2
Permanent hardness can be removed by using .
Choose an answer
Soda lime
Sodium Zeolite
Quick lime
Lime water
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Question # 3
Salt makes the water permanently hard.
Choose an answer
CaSO
4
Ca(HCO
3
)
2
NaHCO
3
NaCO
3
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Question # 4
Mercury poisoning cause:
Choose an answer
neurological damage
high blood pressure
kidney damage
gastro
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Question # 5
Which disease is caused by polluted water.
Choose an answer
Cholera
Typhoid
Diarrhea
All of them
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Question # 6
Fertilizers are used to make up the deficiency of;
Choose an answer
oxygen and carbon
iron and magnesium
nitrogen and phosphorus
hydrogen and calcium
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Question # 7
Hookworm is a parasite that infects the:
Choose an answer
large intestine
small intestine
stomach
liver
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Question # 8
Water has a maximum density at 4
o
C
Choose an answer
12 cm
-3
2 g cm
-3
1 g cm
-3
4 gcm
-3
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Question # 9
Water dissolves non-ionic compound by
Choose an answer
Ion-ion forces
Ion-dipole forces
Dipole -dipole forces
Hydrogen bonding.
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Question # 10
The process by which water rises up from the roots of plants to leaves is called.
Choose an answer
Photosynthesis
Respiration
Surface tension
Capillary action
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Question # 11
Mg
2+
and Ca
2+
ions react with soap to form calcium and magnesium salts of fatty acids called.
Choose an answer
Gelatin
Scum
Paste
None of them
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Question # 12
The lives of aquatic plants and animals are indirectly related to concentration of dissolved gas in water.
Choose an answer
Nitrogen
Hydrogen
Oxygen
Carbon
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Question # 13
The percentage of water in human body is about:
Choose an answer
60%
50%
70%
80%
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