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Question
Draw a neat labelled diagram for the following experiment.
To prove that oxygen is non-combustible, but supports combustion.
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Solution
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RELATED QUESTIONS
Match the following :
| Column A | Column B |
| (a) Global warming | 1. Hydrated ferric oxide |
| (b) Acid rain | 2. Manganese dioxide |
| (c) Rust | 3. Carbon dioxide |
| (d) Catalyst | 4. Methane |
| (e) Photosynthesis | 5. Nitrogen Dioxide |
What was the ancient belief regarding the nature of matter ?
Give two uses of the following component present in air:
nitrogen
Write ‘true’ or ‘false for the following;
Air is a compound.
Tick (√) the correct alternative from the choice given for the following statement.
Photosynthesis is a process in which plants
Tick (√) the correct alternative from the choice given for the following statement.
Fuels which do not leave any residue on burning are
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
What will happen if the number of vehicles and factories in your surroundings increases?
Why is it said that-
Air is a homogeneous mixture of various gases.
The composition of air is always exactly the same.
