Question

Q.14 What are the requisites (qualities) of a good (ideal) fuel?
Q.15 Explain the following terms:-
1st - (Global warming)
2nd - (Acid rain)
Q.16 Suppose you are asked to boil a given quantity of water using cow dung cake, coal
and LPG as fuels. Which fuel would you prefer? Give your reason.
Q.17 Define calorific value of a fuel. Though hydrogen has got highest calorific value but
it is not used as a domestic fuel. Why?
Q.18 Make a labeled diagram of a candle flame.
Q.19 Name various types of combustion. Give example of each type?
Q.20 Differentiate between.
(a) combustible and non combustible substances
(6) Complete combustion and incomplete combustion.
(C) Luminous and Non=Luminous flames.
Q.21 Define the term ignition temperature. Why are substances like alcohol and petrol
called inflammable substances?
Q.22 Write three harmful effects of burning fuel.

Plz give answers clearly and plz note the number of questions that u have answered​

Answer 1

Answer:

14- a) should not consume lot of oxygen

b) should not produce lot co2

c) easily accessible

d) easily available