Flame and combustion

when magnesium ribbon burnt it produce

• magnesium hydroxide

• Magnesium oxide

• magnesium chloride

• magnesium sulphate

Coal burns with ______

• (a) Flame

• (b) Only glow

• (c) Both flame and glow

• (d) None of these

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Water cannot be used as a fire extinguisher to put out.

• (a) Burning charcoal

• (b) Burning oil

• (c) Burning paper

• (d) Burning cloth

CNG and LPG are the examples of

• (a) Solid fuels

• (b) Liquid fuels

• (c) Gaseous fuels

• (d) They are not fuels

Most fuels are made up of___ and ____.

The least hot zone of a candle flame is

• non-lumious zone

• luminous

• dark zone

• blue zone at the base of the wick

Any substance that can burn is an inflammable substance. TRUE or FALSE?

• False

• true

What colours are the outer zone of the flame? (Pick two)

• Colourless

• Blue

• Red

• Orange

Why are some flames only blue?

• they burn too hot to produce a red flame

• there is no fuel to burn

• the fuel source and speed determines the colour

• There are no only blue flames

Which of these is NOT an essential part of fire.

• Fuel.
• Friction.
• Heat.
• Oxygen.