Water is not effective in extinguishing a fire caused by petrol because
1). die flame is too hot for water to cool it down
2). water and petrol react chemically
3). water and petrol are miscible with each other
4). water and petrol are immiscible with each other and petrol which forms the upper layer continues to bum
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1. Which gas is used as fire extinguisher ?
2. When formaldehyde and potassium hydroxide are heated, we get
3. Question 5.26:Explain the terms with suitable examples:(i) Alcosol (ii) Aerosol (iii) Hydrosol
4. Tear gas is
5. The purity of gold is expressed in carats. The purest form of goldis.
6. An electric iron has a heating element made of:
7. Question 7.4:Mention the conditions required to maximise the yield of ammonia.
8. Which one of the following is extensively used for sterilizing water
9. The minimum energy required for an effective collision is