HARD
Earn 100

Draw a neatly labelled flame diagram.

Important Questions on Combustion and Flame

HARD
Science>Chemistry>Combustion and Flame>Structure of a Flame
Mitali and John purchased gas stoves from a shop both of which were of the same type. After a month of use, they found that Mitali’s stove produces a yellow flame, while John’s stove produces a blue one. Who needs to clean the burner of the stove? Why?
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
Make a labelled diagram of a candle flame.
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
Which is the coolest part of a candle flame?
EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
Why is the non-luminous zone of a candle flame hottest?
MEDIUM
Science>Chemistry>Combustion and Flame>Structure of a Flame
Look at the picture given below. It shows different colours of the flame with change in oxygen supply. Number them in correct order from 1 to 4 according to increase in oxygen supply.
C:\Users\pk\Desktop\Colour of flame.PNG
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
Which zone of a flame does a goldsmith use for melting gold and silver and why?
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
The _____ is the hottest part of the 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
Which zone of flame is used by goldsmiths to make gold ornaments 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
Name the zones of a candle which are visible to the unaided eye.
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
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?
EASY
Science>Chemistry>Combustion and Flame>Structure of a Flame
The hottest part of a candle flame is