Select Board & Class
WHAT IS THE FULL FORM OF CNG AND LPG ?????????
list out 10 combustible materials and 10 non combustible materials
What is S.I unit of calorific value?
WHAT KIND OF FIRES CAN EFFECTIVELY BE PUT OUT BY WATER? WHAT KIND OF FIRES IS TI NOT SUITABLE FOR? GIVE REASONS FOR BOTH CASES
why hydrogen not used as a fuel ?
oxygen, nitrogen, carbondioxide, carbon monoxide--------which is odd one out and why
difference between rapid combustion , spontaneous combustion and explosion
Is rusting of iron a combustion process ?
what is ideal fuel?
WHY DO WE WRAP A BLANKET AROUND A PERSON WHOSE CLOTHES CAUGHT FIRE
Only gases burn with a flame. But when you burn wood, it initially burns with a flame. Later, it only glows without a flame. Why?
What is rapid combustion?Give examples.
how is cough formed in our body?????
Q88)Name and give chemical equations to show the products of the combustion reation in:
a)a limited supply of air
b)sufficient supply of air
list some characteristics of an ideal feul?
WHAT PROBLEM WILL ARISE IF A FUEL HAS AN IGNITION TEMPERATURE LOWER THAN THE AVERAGE ROOM TEMPERATURE ? NAME THE TYPE OF COMBUSTIONWILL OCCUR IN THIS CASE
how many types of combustion are there explain them
a)Which of the following fuels is expected to leave a residue upon burning.
a)coal b)petrol c)LPG
In which zone of the flame fuel remains in vapour form ?
Does yellow flame from a gas burner shows complete burning of the fuel ?
distinguish between combustible and non combustible substances ,giving three examples of each
all combustible substance are not fuel. Why??
why do you have to use paper or kerosene oil to start fire in wood or coal
some judicious use of fossil fuels.
NAME ONE FUEL WHICH BURNS WITHOUT GIVING OFF WATER VAPOUR? AND WHY?
what is ideal fuel.
What are inert gases?give some examples?
What is the difference between Spontaneous, rapid and explosion type of combustion
Why does a goldsmith blow the outermost zone of a flame with metallic blowpipe for melting gold and silver?
Why do forest fire occurs during hot summers?
what's the advantage of fish having a streamlined body ?
give 3 conditions which are necessary for combustion?
Green leaves do not burn easily while dry leaves catch fire easily.Explain.
Experts please answer soon :-
Explain in brief why wood is considered to be an ideal fuel for cooking in a remote village on a mountain? it's urgent :)
Is LPG a better domestic fuel than wood and why ?
name two solid fuels,two liquid fuels and two gasious fuel
Please classify the following substances as combustible/non-combustible:-
(a) Iron nails; (b) Stone piece; (c) Straw; (d) Glass
Thank You in advance! :)
What is calorific value ?
The blue zone in a candle flame is blue in colour due to complete combustion. Complete combustion takes place in invisible (non-luminous) zone also. Instead of becoming blue in colour, why is it invisible to us?
WHY DOES A MATCHSTICK BURN ON RUBBING IT ON THE SIDE OF THE MATCHBOX
WHEN THE CLOTHES OF A PERSON CATCH FIRE,HE SHOULD BE COVERED WITH A BLANKET WHY?
why is hydrogen not used as fuel though it has highest calorific value?
Matchsticks are made from 3 substance
Are they all are nonmetal?
which of them make fricition
' Gaseous fuels are better than liquids and solid fuels'. COMMENT.
list out 10 combustible materials and 10 non combustible material from the kitchen
What is the difference between burning of coal and burning of candle ?
can the process of rusting be called combustion need answer with explanation and if possible give some examples but explation is important
are yaar my teacher doesnt know the answer to this question
What is history of matchstick?
What are non-combustible substances? Explain with examples.
why should water not be used to put off fire caused by burning of petrol?
Why are we advised never to sleep in a room with burning coal fire in it?
How has the use of CNG in motor vehicles reduced pollution in big cities?Explain
Calorific value of Cowdung is 7000kg. How much cowdung cakes are required to produce heat energy of 35000 J? Explain with steps.
Suppose you are asked to boil a given quantiity of water using cow dung cake, coal and LPG as fuels. Which fuel would you prefer? Give your reason.
your LPG gas stove at home is giving a yellow flame. What can this mean?
Carbon dioxide is the most commonly used gas for extinguishing a fire. Which properties of carbon dioxide are used here ?
what is the difference between combustion and burning?
paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not
tell me the parts of a burning flame of candle
Which is the coldest zone of a flame?
what precautions should be taken while using cng fuel in vehicles ? plss fasst i have just 9 hrs
what is the difference between combustible and inflammable substances?
why are some materials burn with flame while others without flame?
hope ans by meritnation expert
Flame of burning candle goes off when we blow strongly over it. Why?
which zone of a flame does a goldsmith use for melting gold and silver and why
What is tilling? What purpose does it serve?
What is slow combustion?
why does the paper cup containing water not catch fire on heating ?
is charcoal a inflammable substance?if not then list the items which are inflammable????
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