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Question
Name the following:
An inert gas which has a low boiling point and is used for producing very low temperatures
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Solution
Helium
RELATED QUESTIONS
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.
The humans pollute the air by :
Briefly state the importance of Carbon dioxide.
Give reason:
A burning candle stops burning if covered with a glass tumbler
Name three different appliances where air is utilized.
The diagrams below represents an experiment to show the presence of a component of air.
- State why air is sucked from – outlet ‘B’ and not from outlet “A”
- State why the air is sucked ‘slowly’ from the outlet “B”
- State the observation seen after completion of the experiment.
- State the reason for the above observation seen.
- Name another component which if present in air as a pollutant would have given a similar observation
Name the following:
The product formed when phosphorus burns in oxygen.
When air is moving with cool and soothing, it is called a cyclone.
Nitrogen is an essential element present in proteins and nucleic acids which are the building blocks of living things.
State whether the following statement is true or false. If false, correct them.
Air helps in the movements of sailing yachts and gliders but plays no role in the flight of birds and aeroplanes.
