Download App

Air Around Us — Science STD 6 — Question

CBSE BoardEnglish MediumSTD 6ScienceAir Around Us1 Mark
MCQ
The main constituent of the air is:
  • ✓
    Nitrogen.
  • B
    Oxygen.
  • C
    Carbon dioxide.
  • D
    Hydrogen.
✓

Answer

Correct option: A.
Nitrogen.

Composition of air (Percentage by volume),
nitrogen $= 78.03,$
oxygen $= 20.99,$
carbon dioxide $= 0.03,$
noble gases $= 0.95$ and
some water vapours, dust particles and other impurities.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[1 Marks Each] M.C.Q." from Air Around Us→Air Around Us — all question types→Science STD 6 question papers→CBSE Board STD 6 question papers→CBSE Board question paper generator→

Similar questions

Vitamins and minerals are together included in which of the following food groups?
→
When water with sugar is stirred with a spoon, sugar is dissolved faster. Why does this happen?
→
Which one of the following substances is easily decomposed by microorganisms?
→
Find the odd one out from the following.
→
What is science primarily concerned with?
→
Direction: Read the passages given below and answer the questions that follow. Passage. Mohan's Mother bought rice from market. Before cooking rice Mohan and his mother observed that rice contains impurities such as pebbles, husk and chaff in it. Mohan said that he will not eat these rice as it contain various impurities. But his mother told him that before cooking these impurities are removed by different methods. Which process is used for separation of husk and chaff from rice?
→
Which instrument should be used by Raj at to conveniently measure the length of his room's wall?
→
Thermometer used to measure body temperature of human body is a:
→
Earthworm breathes through:
→
Snail moves with the help of its:
→