|
In an experiment 4.5 kg of a fuel was completely burnt
|
|
0
|
4773
|
March 22, 2018
|
|
Give reasons Water is not used to control fires involving electrical equipments. LPG is a better domestic fuel than wood. Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does n
|
|
0
|
723
|
March 22, 2018
|
|
Compare LPG and wood as fuels
|
|
0
|
14916
|
March 22, 2018
|
|
Forest fire produces a lot of air pollution
|
|
0
|
2551
|
March 22, 2018
|
|
The calorific values of petrol and CNG are 45000 kj/kg and 50000 kj/kg, respectively
|
|
0
|
5925
|
March 22, 2018
|
|
Give two examples each for a solid, liquid and gaseous fuel along with some important uses
|
|
0
|
3350
|
March 22, 2018
|
|
What are the three essential requirements to produce fire?
|
|
0
|
4665
|
March 22, 2018
|
|
Manu was heating oil to fry potato chips
|
|
0
|
4047
|
March 22, 2018
|
|
You are provided with three watch glasses containing milk, petrol and mustard oil, respectively
|
|
0
|
2457
|
March 22, 2018
|
|
Although wood has a very high calorific value, we still discourage its use as a fuel. Explain
|
|
0
|
1526
|
March 22, 2018
|
|
Which zone of a flame does a goldsmith use for melting gold and silver and why?
|
|
0
|
918
|
March 22, 2018
|
|
It is difficult to burn a heap of green leaves but dry leaves catch fire easily
|
|
0
|
1289
|
March 22, 2018
|
|
Explain how C02 is able to control fires
|
|
0
|
758
|
March 22, 2018
|
|
Make a labelled diagram of a candle flame
|
|
0
|
9104
|
March 22, 2018
|
|
Explain how the use of CNG in automobiles has reduced pollution in our cities
|
|
0
|
3349
|
March 22, 2018
|
|
List conditions under which combustion can take place
|
|
0
|
2563
|
March 22, 2018
|
|
What do you understand by fuel efficiency?
|
|
0
|
4324
|
March 22, 2018
|
|
Cracker on ignition produces sound
|
|
0
|
2675
|
March 22, 2018
|
|
People usually keep Angethi/burning coal in their closed rooms during winter season
|
|
0
|
3520
|
March 22, 2018
|
|
Separate the following materials as combustible and non-combustible
|
|
0
|
2648
|
March 22, 2018
|