PDF chapter test TRY NOW
1. Penicillin was first discovered by.
2.World ORS Day is .
3. Combustion is a chemical reaction in which and substance react with.
4. In the presence of water, the ignition temperature of paper is.
3. Combustion is a chemical reaction in which and substance react with.
4. In the presence of water, the ignition temperature of paper is.
5. Fire produced by oil cannot be controlled by .
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