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The MCQs below are drawn from the Chemistry subject category.
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2281
Regarding the phenomenon of eutrophication, which of the following statements are accurate? 1. It involves the nutrient enrichment of a water body. 2. It results in the depletion of dissolved oxygen in the water.
Eutrophication occurs when excessive nutrients, such as nitrates and phosphates, enter water bodies, leading to rapid algal blooms. As these algae die and decompose, aerobic bacteria consume large amounts of dissolved oxygen, creating hypoxic conditions that can lead to the death of aquatic life, confirming both statements.
2282
What is the physical state of the first four alkanes?
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2284
How many bonds are formed by carbon with other atoms?
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Rectified spirit is a type of ethanol that contains 95% ethanol and 5% water. It is commonly used as a solvent and is also known as 'rectified spirit' or 'denatured alcohol'.
Cement synthesis involves a combination of both dry and wet processes. The dry process involves grinding and calcination of raw materials, while the wet process involves mixing and heating the raw materials with water.
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2289
In the purification of portable water the coagulant used is_________________?
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2290
Step of sewage water treatment in which effluent from a sewage plant is treated with chlorine is called
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