PDF chapter test TRY NOW
Answer the following questions in a short sentences:
1.If you hold a piece of iron wire with a pair of tongs inside a candle flame or a Bunsen burner flame, what will you observe? Will it produce a flame?
If we hold a piece of iron wire with a pair of tongs inside the flame of a candle or a bunsen burner, it will turn without forming .
2. People usually keep Angethi/burning coal in their closed rooms during winter season. Why is it advised to keep the door open?
When coal burns in the air, it produces carbon dioxide, which is non-poisonous. But, when Angethi or coal burns in a closed room, the air or oxygen cannot enter the room. So, in the insufficient oxygen supply, coal burns to produce , a highly poisonous gas. It causes in a closed room. So, the door and windows should be open.
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