Question

3. A Luminous flame appears
(a) Red
(b) Green
(c) Yellow
(d) Blue
In which zone of a candle flame does complete combustion take place ?
(a) Inner
(b) Outer
(c) Middle
(d) All the above,
Which of the following fuels has th
highest calorific valve?
(a) Petrol
(b) Hydrogen
(C) LPG
(d) Natural gas.​

Answer 1

Explanation:

1) Yellow

2)Inner which shows a blue flame

3) Petrol its calorific value is 45.8Mj/kg

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Answer 2

Answer:

3. a luminous flame appears

answer: c. yellow

In which zone of a candle flame does complete combustion take place?

answer: b. outer

which of the following fuels has the highest calorific value?

answer: b. hydrogen