Chemistry - Study Mode

[#826] The increasing abundance of green house gases in atmosphere has led to the following effect except
Correct Answer

(C) Oxygen fertilization effect

Explanation

Solution: The increasing abundance of green house gases in atmosphere has led to the following effect except oxygen fertilization effect.

[#827] The source of energy that causes the least global warming is
Correct Answer

(B) Geothermal energy

Explanation

Solution: Fossil fuels — coal, petroleum, and natural gas — are the primary culprit behind climate change. They contribute more than 80 percent of greenhouse gas emissions — and 98 percent of CO 2 emissions alone. On the contrary, Geothermal energy is thermal energy generated and stored in the Earth. It is clean and sustainable.

[#828] Which of the following fuels causes minimum environmental pollution?
Correct Answer

(C) Hydrogen

Explanation

Solution: When hydrogen burns it becomes water vapor. There are no carbon or other compounds released into the atmosphere. There are various compounds including carbon dioxide and carbon monoxide released when other fuels are burnt.

[#829] Biofertilizers convert nitrogen to ________ .
Correct Answer

(B) Ammonia

Explanation

Solution: Bio-fertilizers are micro-organisms which bring about nutrient enrichment of soil by enhancing the availability of nutrients to crops. The micro-organisms which act as bio-fertilizers are bacteria, cyanobacteria (blue green algae) and mycorrhizal fungi. The symbiotic nitrogen-fixing bacteria convert free nitrogen to ammonia, which the host plant utilizes for its development.

[#830] The elements in the modern Periodic table are arranged according to their
Correct Answer

(C) Atomic number

Explanation

Solution: The elements in the modern periodic table are arranged according to their atomic number.