Write a note on water. Explain its sources and occurrence.
Water is a universal solvent. Justify this statement.
Discuss some disadvantages of natural substances found in water?
Discuss some benefits of natural substances found in water?
List down the main steps for treatment of domestic water supply.
Compare and contrast the uses of distilled water and tap water in practical chemistry applications.
What is Water Pollution? Write down major sources of water pollution.
Write a note on Water borne diseases.
Discuss ways to deal with the negative effects of water pollution.
Explain water scarcity as an important issue faced by Pakistan and the
State that urea, ammonium salts, and nitrates are used as fertilizers. Explain the use of NPK fertilizers to provide the elements nitrogen, phosphorus, and potassium for improved plant growth.
How does anhydrous copper (II) sulphate act as a desiccant and indicator for the presence of water? Describe the color changes observed during the test?
Why are melting and boiling points considered physical properties suitable for testing the purity of water? How do impurities affect these properties?
What are key differences between distilled water and tap water, and how do these differences impact their use in practical chemistry experiment?
Describe a simple experiment to distinguish between distilled water and tap water based on their properties. How can these differences be useful in chemistry applications?
What is a fertilizer?
Why are fertilizers used?
An NPK fertilizer contains three elements, that plants need, (a) Name the three element.
Suggest two salts (an ammonium salt and a nitrate) which will form an NPK fertilizer when mixed together.
Fertilizer can harm aquatic life. Explain how
Tap water is not used make aqueous solution in the lab (a) Why is tap water not used? (b) What is used instead?
You have a liquid, and some blue cobalt (II) chloride paper. (a) How could you prove that the liquid contains water? (b) How will you prove that it is not a pure water?
What percentage of Pakistan's population faces severe shortages of water annually?
Name the primary river system Pakistan relies on for its water supply. By what year could Pakistan potentially have severe water crisis if current trends continue?
What are two major causes of water scarcity in Pakistan?
How can recycling water help mitigate Pakistan's water scarcity issue?
Why is it important for farmers in Pakistan to use water more efficiently?
What is one common water-borne disease mentioned that causes severe diarrhea and dehydration?
How can boiling water help prevent cholera?
Name the bacteria responsible for causing typhoid fever?
What is the main preventive measure against hepatitis A?