Question

bjective type questions
Choose the correct option.
1. Which of the following takes place in inadequate amount of air or oxygen?
(a) Complete combustion
(b) Incomplete combustion
(c) Explosion
(d) Both (a) and (b)
2. Which of these is necessary for combusti
on?
(a) Combusti
ble substance
(b) Attainment of ignition temperature
(c) Supporter of combustion
(d) All of these
3. A non-luminous flame appears
(a) red
(b) blue
(c) white
(d) pink
4. Which of these has the highest carbon content?
(d) Natural gas
(b) Bituminous coal (c) Lignite
(a) Anthracite
5. CNG stands for
(b) compact natural gas
(a) compressed natural gas
(d) combustible neutral gas
(c) carbonated natural gas​

Answer 1

1.(a) Complete combustion

2.(d) All of these

3.(b) blue

4.(b) Bituminous coal

5.(a) compressed natural gas

Explanation:

(a) ((d) All of these) All of these combustion