Question

(d) charcoal
F
1
O d) pollutants
2.
0 (c)non-luminous zone
(a) none of these
0 0 0
A. Multiple choice type questions:
Compounds containing hydrogen and carbon are called
(c) hydrocarbons
(b)coal
(a) organisms
Flames have different zones of different
(a) combustion
(b) temperature
(c) fuels
The middle zone of flame is a bright
(a) dark zone
(b) luminous zone
Combustion requires fuel, oxygen and
O (b)carbon dioxide (c) heat
Natural gas contains methane about
(a) 80%
(b) 30%
(c) 90%
13
(d) hydrogen
4.
(a) gas
(d) 50%
5.​

Answer 1

Answer:

put the question please