1. Which of the following is necessary for combustion?, A) Water, B) Oxygen, 2. Which fuel burns without producing smoke?, B) Wood, C) LPG, 3. The lowest temperature at which a substance catches fire is called:, B) Melting point, C) Ignition temperature, 4. Which gas is used in fire extinguishers?, B) Hydrogen, C) Carbon dioxide, 5. Which part of a candle flame is the hottest?, B) Middle luminous zone, C) Outermost non-luminous zone, Combustion can occur without oxygen, ✅ True, ❌ False, LPG is a clean fuel, ❌ False, ✅ True, The yellow part of a flame is the hottest., ✅ True, ❌ False, Water can be used to put out every type of fire., ❌ False, ✅ True, Burning of coal causes air pollution., ✅ True, ❌ False
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cumbustion
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