Chapter 7 Water Important MCQs with Answers | 10th Class Chemistry

Here we have provided all the important Multiple choice questions and answers of Chapter Water of 10th class chemistry.


MCQ 1: During thunderstorms, water dissolves
A. dust particles
B. HCl
C. nitric acid
D. clouds
MCQ 2: Water which forms scum with soap is called
A. hard water
B. soft water
C. distilled water
D. un distilled water
MCQ 3: Water in swimming pools is purified by adding
A. sodium
B. chlorine
C. phosphorus
D. potassium
MCQ 4: Out of total the amount of water available for human use is
A. 0.30%
B. 0.2%
C. 40%
D. 50%
MCQ 5: The density of water becomes maximum at
A. 10°C
B. 4°C
C. 5°C
D. 12°C
MCQ 6: Property due to which water acts as a universal solvent is
A. polarity
B. it's ability to make hydrogen bond
C. both A and B
D. strong dipole dipole interaction
MCQ 7: The ratio of hydrogen (H) and oxygen (O) in water molecule by volume is
A. 2: 1
B. 1: 2
C. 3: 1
D. 4: 1
MCQ 8: Natural water is
A. pure
B. impure
C. acts as solute
D. distilled
MCQ 9: The hardness which can be removed by boiling is called
A. permanent hardness
B. temporary hardness
C. stiffness
D. toughness
MCQ 10: Temporary hardness can be removed by adding
A. lime
B. carbon
C. oxygen
D. slaked lime
MCQ 11: Addition of washing soda removes
A. softness of water
B. temporary hardness of water
C. permanent hardness of water
D. hydrogen from water
MCQ 12: Hard water can block radiators due to formation of
A. insoluble calcium and magnesium salts
B. insoluble sodium salts
C. in soluble phosphate salts
D. insoluble potassium salts
MCQ 13: Water exist in only
A. one state
B. two state
C. three states
D. 4 states
Answers:
1. C
2. A
3. B
4. B
5. B
6. C
7. A
8. B
9. B
10. D
11. C
12. A
13. C 

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