Question

2. Give two uses of the following components
present in air :
(a) oxygen (b) nitrogen
(c) carbon dioxide (d) water vapour
3. Define the following:
(a) Respiration, (b) Photosynthesis,
(c) Combustion.​

Answer 1

Answer:

oxygen = Common uses of oxygen include production of steel, plastics and textiles, brazing, welding and cutting of steels and other metals, rocket propellant, oxygen therapy, and life support systems in aircraft, submarines, spaceflight and diving.

nitrogen =

give two uses of Nitrogen

give two uses of NitrogenResults in English

give two uses of NitrogenResults in Englishनाइट्रोजन के दो उपयोगों देना

give two uses of NitrogenResults in Englishनाइट्रोजन के दो उपयोगों देनाहिन्दी में नतीजे

give two uses of NitrogenResults in Englishनाइट्रोजन के दो उपयोगों देनाहिन्दी में नतीजेSearch Results

give two uses of NitrogenResults in Englishनाइट्रोजन के दो उपयोगों देनाहिन्दी में नतीजेSearch ResultsFeatured snippet from the web

give two uses of NitrogenResults in Englishनाइट्रोजन के दो उपयोगों देनाहिन्दी में नतीजेSearch ResultsFeatured snippet from the webNitrogen is important to the chemical industry. It is used to make fertilisers, nitric acid, nylon, dyes and explosives. To make these products, nitrogen must first be reacted with hydrogen to produce ammonia. This is done by the Haber process.

carbon dioxide =Carbon dioxide in solid and in liquid form is used for refrigeration and cooling. It is used as an inert gas in chemical processes, in the storage of carbon powder and in fire extinguishers. Metals Industry: Carbon dioxide is used in the manufacture of casting molds to

water vapour=the use of water vapor is (to help us breathe), rain and clouds to block the sun for shade where there are not many trees. also, it creates fog so some people can paint it. my main reson is the cloud one. when water vapour gathers together, it creates clouds

Respiration =energy from food. Respiration usually needs oxygen

photosynthesis = plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water.

plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water."sunlight captured by photosynthetic organisms"

combustion= the process of burning

pls mark me as brilliant answer

Answer 2

2

a Oxygen is used by animals and plants in

the respiration (breathing) process. Tanks of

oxygen are used in medicine to treat people

with breathing problems

b It is used to make fertilisers, nitric acid, nylon

dyes and explosives. To make these products,

nitrogen must first be reacted with hydrogen to

produce ammonia.

c It is used as an inert gas in chemical processes,

in the storage of carbon powder and in fire

extinguishers. Metals Industry: Carbon dioxide

is used in the manufacture of casting molds to

enhance their hardness.

3. a. The process of releasing energy from food is

called respiration.

b. The process by which green plants

prepare food is called photosynthesis.

During this process; the solar energy

is converted into chemical energy and

carbohydrates are formed. Green leaves

are the main sites of photosynthesis.

c. Combustion is a chemical process or

a reaction between Fuel (Hydrocarbon) and

Oxygen.