FLAME

which fuels are used for running automobiles?

• wood

• coal

• diesel

• charcoal

when magnesium ribbon burnt it produce

• magnesium hydroxide

• Magnesium oxide

• magnesium chloride

• magnesium sulphate

Combustion is a reaction in which a substance reacts with

• hydrogen

• Nitrogen

• Oxygen

• Chlorine

Tags

NGSS.MS-PS1-2

Fuel may be

• Solid

• Liquid

• Gas

• All of the three

Combustion is a

• Physical process

• Chemical process

• both A and B

• None of these

Burning of charcoal in a closed room will produce

• Carbon dioxide

• Nitrogen DIoxide

• Carbon monoxide

• all of these.

there are following zones of a flame

• Two

• Three

• Four

• No any zone

Which is the hottest part in the flame of the candle

• Yellow

• Wax part

• Black

• Blue

Good fuel is

• Readily available

• Cheap

• Burn easily in air

• All of these

What does this hazard symbol warn of?

• The substance is explosive

• The substance burns easily

• The substance supplies oxygen to fires

• The substance puts out fires