Class 12 Chemistry · Chapter 17 · Test 1
Water Quality and Pollution
45 MCQs
45 questions · 35 min · 45 marks
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Sample questions
The first 5 of 45. Try each one, then tap to see the answer.
Question 1
The water molecule (H2O) is a:
- ANon-polar molecule
- BPermanent dipole
- CFree radical
- DIon
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Answer: B
Its polarity gives water its unique properties.
Question 2
The polarity of water results in the formation of ___ between water molecules.
- AIonic bonds
- BMetallic bonds
- CHydrogen bonds
- DCovalent network bonds
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Answer: C
Hydrogen bonding underlies many properties of water.
Question 3
Which property of water is primarily responsible for its ability to resist rapid temperature changes in large aquatic ecosystems?
- AAmphoteric nature
- BHigh specific heat capacity
- CThe permanent dipole
- DHigh redox potential
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Answer: B
Hydrogen bonding gives a high specific heat capacity.
Question 4
Hydrogen bonding gives water a high heat of vaporisation and a high:
- ASpecific heat capacity
- BElectrical conductivity
- CReactivity with metals
- DColour intensity
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Answer: A
Large water bodies are therefore thermally stable.
Question 5
Large bodies of water are thermally stable which means they:
- AHeat up rapidly
- BCool down rapidly
- CFreeze quickly
- DResist rapid temperature changes
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Answer: D
This is due to the high specific heat capacity.
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