Category: 4. Patwari (HP), JBT (HP)

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

A village runs a biogas plant but still calls it “renewable”; which key reason makes biogas renewable compared to petrol

A town shifts its streetlights from coal-based electricity to solar panels; which resource category is being increased in use A

When we say a resource is “renewable,” it usually means the resource can be replaced by nature within A A