Author: Study Clue

A room heater using coal is left on overnight with windows shut; which immediate biological danger becomes highest, even before

A flame becoming yellow and smoky while cooking usually suggests what change in the air–fuel condition at the burner? A

A blue flame in an LPG stove usually indicates what about the burning process compared to a yellow flame? A

In a poorly ventilated kitchen, why can a coal or charcoal stove become risky even if the flame looks normal?

Why can incomplete burning of petrol or coal in a closed room become dangerous for people inside? A Makes more

In a closed glass jar, a burning candle goes out after some time mainly because the jar runs out of

A strip of paper may not burn in a room with very low oxygen mainly because the fire triangle lacks

When a substance burns in air and forms new substances with heat and light, it is called A Freezing process

In a kitchen stove, the “fuel” is the substance that A Stops the fire B Burns to give heat C

Combustion is best described as A Cutting metal sheets B Freezing water fast C Dissolving salt D Burning in oxygen