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There are following zones of a flame :-...

There are following zones of a flame :-

A

Two

B

Three

C

Four

D

No any zone

Text Solution

Verified by Experts

The correct Answer is:
B
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In order to understand the structure of a flame, light a wax candle and watch its flame. Carefully note the different coloured zones in the flame. Starting from the base of the flame, a flame has three zones. Check the below figure and try to answer the following question Why the flame in the outermost zone is blue in colour?

A flame is the visible gaseous part of a fire. It is a zone of combustion of gaseous substances accompanied by evolution of heat and light. All substances do not burn with a flame. Only those substances that vaporise during burning produce flame. A candle flame is taken to study the various zones of a flame. Which zone of a candle flame is the zone of no combustion?

Knowledge Check

  • Which of the following does not form a flame?

    A
    bunsen burner
    B
    candle
    C
    charcoal
    D
    kerosene lamp

  • In which of the following zones of atmosphere ozone layer is present ?

    A
    Troposphere
    B
    Stratosphere
    C
    Mesosphere
    D
    Exosphere

  • Rearrange the following zones as seen in the root in vertical section and choose the correct option. A.Root hair zone , B.Zone of meristems C.Root cap zone , D.Zone of maturation E.Zone of elongation

    A
    C,B,E,A,D
    B
    A,B,C,D,E
    C
    D,E,A,C,B
    D
    E,D,C,B,A

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    A flame is the visible gaseous part of a fire. It is a zone of combustion of gaseous substances accompanied by evolution of heat and light. All substances do not burn with a flame. Only those substances that vaporise during burning produce flame. A candle flame is taken to study the various zones of a flame. Different zones of a candle flame are marked by the letters (A), (B) and (C). Which of the following statements are correct? (I) (B) is the hottest part of the flame. (II) (C) is moderately hot. (III) (A) is the hottest part of the flame. (IV) (A) is moderately hot whereas (C) is the coldest part. (V) (C) is the luminous zone. (VI) (B) is the luminous zone. (VII) (A) is the dark zone.

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