flame

Which zone represents the partial combustion in candle flame?

• (a) Outer zone

• (b) Middle zone

• (c) Inner zone

• (d) Lower zone

Which zone of a flame does a goldsmith use for melting gold and silver ?

• (a) Outer zone

• (b) Middle zone

• (c) Inner zone

• (d) Lower zone

The outermost zone of flame is in colour.

• (a) blue

• (b) orange

• (c) brown

• (d) dark

Which of the following does not produce flame while burning?

• (a) Wax

• (b) Petrol

• (c) Diesel

• (d) Coal

In which zone of candle flame where no combustion takes place?

• outermost

• middle

• innermost

• all of these

Flame is produced when the fuel can _____ on heating.

• freeze

• vaporize

• glow

• liquefy