Chemistry
Ethanol containing 5% water is known as

Rectified spirit
Power alcohol
Methylated alcohol
Denatured spirit

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Chemistry
Water is not effective in extinguishing a fire caused by petrol because

The flame is too hot for water to cool it down
Water and petrol react chemically
Water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn
Water and petrol are miscible with each other

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