Air is a mixture of many _______. - Science

Air is a mixture of many _______.

Fill in the Blanks

Air is a mixture of many Gases.

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Chapter 3: Air We Breathe - Evaluation [Page 97]

Chapter 3 Air We Breathe
Evaluation | Q V. 1. | Page 97

Answer the question put against the following constituents of air :

Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.

Tick (√) the most appropriate answer.

Symbiotic bacteria is not present in the nodules of :

Complete and balance the following equation

CaO + H₂O →

State the full form of LPG and CNG? How are the two different in their composition?

Give word equation for the following conversion:

Nitric oxide to nitrogen dioxide

Explain why during an incident of fire, one is advised to wrap a woollen blanket over a burning object.

Write about the reaction of nitrogen with non metals.

How will you show that air is dissolved in water?

Nitrogen is an essential element present in proteins and nucleic acids which are the building blocks of living things.

Explain the following observations very briefly

Breathing through mouth may harm you.