Zones of Candle Flame

Q. Label the different zones of a candle flame in the given image.

1. Outer zone
2. Middle zone
3. Innermost zone

Q.

Arrange the different regions of a flame in increasing order of temperature.

1. Middle region < inner region < outermost region

2. Inner region < middle region < outermost region

3. Inner region < outermost region < middle region

4. Outermost region < inner region < middle region​

Q.

The middle region of a candle flame has limited supply of oxygen and partial burning takes place there. The temperature here is:

1. 3 > 2 > 5 > 4 > 1

2. 2 > 3 > 4 > 5 > 1

3. 2 > 3 > 5 > 4 > 1

4. 1 > 3 > 4 > 5 > 2

Q. The innermost region of a candle flame has the lowest temperature.

1. True
2. False

Q. The outermost region of a flame is the hottest because of ______.

1. complete burning
2. incomplete burning
3. insulation
4. partial burning

Q.

The middle zone of a candle flame is also called the zone of ______ combustion.

1. complete

2. partial

3. rapid

4. spontaneous

Q. The colour of the outer zone of a candle flame is _________.

1. orange
2. yellow
3. red
4. blue

Q. The process of hot air rising over cold air is called ___.

Q. Which of the following is considered as the zone of partial combustion in a flame?

1. Innermost zone
2. Outermost zone
3. Non-luminous zone
4. Luminous zone

Q. Molten wax on heating releases __________________.

1. water and hydrogen gas.
2. water and carbon dioxide.
3. carbon and hydrogen gas.
4. carbon dioxide and hydrogen gas.