Question

Which is true regarding air?
A. Compound of gases
B. Element of gases
C. Mixture of gases
D. Substances of gases

Answer 1

Answer:

b elements of gases

Explanation:

becoz it has all the elements regarding and all the compound mixture and susbtance air comes under the elements of air

Answer 2

Answer:

C) Air is Mixture of gases.

• Air is homogenous mixture of various gases.
• It is one of the four classical element.
• The atmospheric air contain oxygen, carbon dioxide, nitrogen etc.
• IN 1785,SIR HENRY CAVENDISH had learned that air is at least 99.3 % of    oxygen/carbondioxide/nitrogen and with 0.7 some other gases .
• Composition of air as follow :

1. Nitrogen   -    78%
2. Oxygen    -     21%
3. Other gases  -  1%

Other gases such as carbon dioxide, methane, amonia , hydrogen ,neon,helium,argon radon, krpton ,xenon etc.

Explanation: