HARD
Earn 100

Draw the diagram of candle flame and label all the zones. 

Important Questions on Combustion and Flame

EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
Which zone of flame is used by goldsmiths to make gold ornaments and why?
EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
Name the zones of a candle which are visible to the unaided eye.
MEDIUM
Science>Chemistry>Combustion and Flame>Structure of a Flame
In a candle flame, what is the colour of:
(a) Innermost zone
(b) Middle zone
(c) Outer zone
MEDIUM
Science>Chemistry>Combustion and Flame>Structure of a Flame
Draw a diagram showing different zones of a candle flame. Which zone contains:
 unburnt vapour of wax
 
EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
Which is the coolest part of a candle flame?
EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
What is responsible for the emission of yellow light from a candle flame?
EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
In which zone of a flame fuel remains in vapour form?
MEDIUM
Science>Chemistry>Combustion and Flame>Structure of a Flame
What makes the middle zone of a candle flame luminous (or light-giving)?
MEDIUM
Science>Chemistry>Combustion and Flame>Structure of a Flame
In a candle which of these catches fire - solid wax/molten wax/wax vapour?
MEDIUM
Science>Chemistry>Combustion and Flame>Structure of a Flame
Make a labelled diagram of a candle flame.
EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
The hottest part of a candle flame is
HARD
Science>Chemistry>Combustion and Flame>Structure of a Flame
Why cooking is fast when a cooker is kept on the blue flame over a burner?
MEDIUM
Science>Chemistry>Combustion and Flame>Structure of a Flame
Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?
MEDIUM
Science>Chemistry>Combustion and Flame>Structure of a Flame
Two students A and B heated the same mass of water on a candle flame. The student A kept the beaker slightly above the flame of the candle and student B kept the beaker close to the wick of the candle. In which case, the water will get heated in the shortest time and why?
EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
In which zone of a candle flame complete combustion of fuel takes place?
EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
Why is the non-luminous zone of a candle flame hottest?
EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
Cotyledons are also called-
HARD
Science>Chemistry>Combustion and Flame>Structure of a Flame
Label the diagram and explain the different zones in a candle flame.
MEDIUM
Science>Chemistry>Combustion and Flame>Structure of a Flame
Which zone of a flame does a goldsmith use for melting gold and silver and why?
EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
The _____ is the hottest part of the candle flame.