Select Board & Class
WHAT IS THE FULL FORM OF CNG AND LPG ?????????
list out 10 combustible materials and 10 non combustible materials
some judicious use of fossil fuels.
What is S.I unit of calorific value?
why hydrogen not used as a fuel ?
What is the difference between burning of coal and burning of candle ?
Is rusting of iron a combustion process ?
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
what is ideal fuel?
WHY DO WE WRAP A BLANKET AROUND A PERSON WHOSE CLOTHES CAUGHT FIRE
Why do forest fire occurs during hot summers?
What is rapid combustion?Give examples.
how is cough formed in our body?????
list some characteristics of an ideal feul?
Why are we advised never to sleep in a room with burning coal fire in it?
how many types of combustion are there explain them
difference between rapid combustion , spontaneous combustion and explosion
why does the paper cup containing water not catch fire on heating ?
distinguish between combustible and non combustible substances ,giving three examples of each
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
all combustible substance are not fuel. Why??
why are red buckets containing sand are kept in cinema halls ?
why do you have to use paper or kerosene oil to start fire in wood or coal
WHY WOOD SHAVINGS BURN MORE EASILY THAN A LOG WOOD?
When a hydrocarbon fuel is burnt, it always gives out carbon dioxide and water vapour. Do you agree? Give reasons.
what is ideal fuel.
WHEN A CANDLE BURNS ,IS IT POSSIBLE TO GET THE WAX BACK
A) AFTER THE WAX MELTS
B) AFTER THE WAX BURNS
What are inert gases?give some examples?
Why does a goldsmith blow the outermost zone of a flame with metallic blowpipe for melting gold and silver?
what's the advantage of fish having a streamlined body ?
What is the difference between Spontaneous, rapid and explosion type of combustion
give 3 conditions which are necessary for combustion?
Green leaves do not burn easily while dry leaves catch fire easily.Explain.
Is LPG a better domestic fuel than wood and why ?
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.
NAME ONE FUEL WHICH BURNS WITHOUT GIVING OFF WATER VAPOUR? AND WHY?
name 5 non combustible substances.
What is calorific value ?
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?
' Gaseous fuels are better than liquids and solid fuels'. COMMENT.
WHY CARBON DIOXIDE IS CONSIDERED AS THE BEST FIRE EXTINGUISHER?
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
Why water is not used to control fires involving electrical equipments
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?
why should water not be used to put off fire caused by burning of petrol?
why is phosphorous stored in kerosene and not in water or other such liquids ?
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
Why water cannot stop fire produced by oil?
What are non-combustible substances? Explain with examples.
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?
what is the difference between combustion and burning?
An ideal fuel has .......... calorific value .
your LPG gas stove at home is giving a yellow flame. What can this mean?
paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not
what precautions should be taken while using cng fuel in vehicles ? plss fasst i have just 9 hrs
why are some materials burn with flame while others without flame?
hope ans by meritnation expert
name two solid fuels,two liquid fuels and two gasious fuel
which zone of a flame does a goldsmith use for melting gold and silver and why
What is slow combustion?
What is tilling? What purpose does it serve?
how to show that the middle zone of the candle flame consists of unburnt particles
Why does petrol catch fire easily but a wood does not ?
Expect a answer by meritnation expert !!
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