Class 10 Chemistry MCQs - Chapter 7
Environmental Chemistry II Water Quiz Questions & Answers PDF Download - 11
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Environmental Chemistry II Water Exam Questions and Answers PDF Download: Test 11
Which of the following is a disease that proceeds from obstruction of the liver?
- cholera
- dysentery
- jaundice
- hepatitis
How much percentage of the Earth's crust is covered by water?
- 0.69
- 0.71
- 0.8
- 0.75
Hard water can block radiators due to the formation of
- insoluble calcium and magnesium salts
- insoluble sodium salts
- insoluble phosphate salts
- insoluble potassium salts
What is the total amount of water present on Earth?
- 1.33 billion cubic kilometers
- 1.33 billion cubic meters
- 1.33 million cubic kilometers
- 1.33 million cubic meters
Ice floats on top of the water because
- water expands on freezing
- water contracts on freezing
- ice is lighter than water
- none of above
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