Select Board & Class
WHAT IS THE FULL FORM OF CNG AND LPG ?????????
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
list out 10 combustible materials and 10 non combustible materials
What is S.I unit of calorific value?
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
why hydrogen not used as a fuel ?
Is rusting of iron a combustion process ?
what is ideal fuel?
WHY DO WE WRAP A BLANKET AROUND A PERSON WHOSE CLOTHES CAUGHT FIRE
What is rapid combustion?Give examples.
a)Which of the following fuels is expected to leave a residue upon burning.
a)coal b)petrol c)LPG
D)CNG.
how is cough formed in our body?????
what is the difference between combustible and inflammable substances?
list some characteristics of an ideal feul?
how many types of combustion are there explain them
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?
difference between rapid combustion , spontaneous combustion and explosion
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
Why does a matchstick not burn on its own?
some judicious use of fossil fuels.
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
what is ideal fuel.
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?
ALL COMBUSTIBLE SUBSTANCES ARE NOT FUELS. WHY?
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.
Is LPG a better domestic fuel than wood and why ?
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.
NAME ONE FUEL WHICH BURNS WITHOUT GIVING OFF WATER VAPOUR? AND WHY?
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?
Write an Activity - To study Ignition Temperature Using Paper Cup .
why is hydrogen not used as fuel though it has highest calorific value?
A better fuel leaves __________ (more/less) residue after combusion.
' Gaseous fuels are better than liquids and solid fuels'. COMMENT.
is charcoal a inflammable substance?if not then list the items which are inflammable????
Why do forest fire occurs during hot summers?
name two solid fuels,two liquid fuels and two gasious fuel
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?
Does camphor produce a flame on burning? If yes, what will be its colour?
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 the difference between Spontaneous, rapid and explosion type of combustion
What are non-combustible substances? Explain with examples.
State whether the statement is true or false :
Petrol is an inflammable substance. (If true, then give reason.)
why should water not be used to put off fire caused by burning of petrol?
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.
What is history of matchstick?
your LPG gas stove at home is giving a yellow flame. What can this mean?
what is the difference between combustion and burning?
give reason:
paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not
DIFFERENTIATE BETWEEN SLOW COMBUSTION RAPID COMBUSTION SPONTANEOUS COMBUSTION AND VOLATILE COMBUSTION.
PLZ..... ANSWER IT FAST .IT S IMPORTANT.
What is the difference between burning of coal and burning of candle ?
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
does combustion takes place inside our body too????
which zone of a flame does a goldsmith use for melting gold and silver and why
when we blow a candle goes off but why a chula or angiti burns on blowing ?
What is tilling? What purpose does it serve?
If matchstick provide heat, then what is the fuel here? If there is no fuel here then how does it burn?
What is slow combustion?
True/False
a) Burning of coal in termal power plants can result in acid rain.
b) The ignition temperature of coal is high;hence it is easy to ignite.
why does the paper cup containing water not catch fire on heating ?
E.g: 9876543210, 01112345678
We will give you a call shortly, Thank You
Office hours: 9:00 am to 9:00 pm IST (7 days a week)
Syllabus
WHAT IS THE FULL FORM OF CNG AND LPG ?????????
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
list out 10 combustible materials and 10 non combustible materials
What is S.I unit of calorific value?
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
why hydrogen not used as a fuel ?
Is rusting of iron a combustion process ?
what is ideal fuel?
WHY DO WE WRAP A BLANKET AROUND A PERSON WHOSE CLOTHES CAUGHT FIRE
What is rapid combustion?Give examples.
a)Which of the following fuels is expected to leave a residue upon burning.
a)coal b)petrol c)LPG
D)CNG.
how is cough formed in our body?????
what is the difference between combustible and inflammable substances?
list some characteristics of an ideal feul?
Which of the following pairs of substances catches fire at 250 degree Celsius ?
A)q and s
B)p and r
C)r and s
D) p and q
how many types of combustion are there explain them
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?
difference between rapid combustion , spontaneous combustion and explosion
distinguish between combustible and non combustible substances ,giving three examples of each
all combustible substance are not fuel. Why??
A)coal
B) wood
C)biogas
D)charcoal
why do you have to use paper or kerosene oil to start fire in wood or coal
Why does a matchstick not burn on its own?
some judicious use of fossil fuels.
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
what is ideal fuel.
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?
ALL COMBUSTIBLE SUBSTANCES ARE NOT FUELS. WHY?
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.
Is LPG a better domestic fuel than wood and why ?
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.
NAME ONE FUEL WHICH BURNS WITHOUT GIVING OFF WATER VAPOUR? AND WHY?
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?
Write an Activity - To study Ignition Temperature Using Paper Cup .
why is hydrogen not used as fuel though it has highest calorific value?
A better fuel leaves __________ (more/less) residue after combusion.
' Gaseous fuels are better than liquids and solid fuels'. COMMENT.
is charcoal a inflammable substance?if not then list the items which are inflammable????
Why do forest fire occurs during hot summers?
name two solid fuels,two liquid fuels and two gasious fuel
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?
Does camphor produce a flame on burning? If yes, what will be its colour?
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 the difference between Spontaneous, rapid and explosion type of combustion
What are non-combustible substances? Explain with examples.
State whether the statement is true or false :
Petrol is an inflammable substance. (If true, then give reason.)
why should water not be used to put off fire caused by burning of petrol?
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.
What is history of matchstick?
your LPG gas stove at home is giving a yellow flame. What can this mean?
what is the difference between combustion and burning?
give reason:
paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not
DIFFERENTIATE BETWEEN SLOW COMBUSTION RAPID COMBUSTION SPONTANEOUS COMBUSTION AND VOLATILE COMBUSTION.
PLZ..... ANSWER IT FAST .IT S IMPORTANT.
a)petrol
b)kerosene
c)coal
d)LPG
the substance having the highest calorific value is
a. LPG
B. hydrogen
c. oxygen
d. coal gas
which of the following. has the highest calorific value?
1. wood
2.dung cake
3. methane gas
4. biogas
What is the difference between burning of coal and burning of candle ?
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
does combustion takes place inside our body too????
which zone of a flame does a goldsmith use for melting gold and silver and why
when we blow a candle goes off but why a chula or angiti burns on blowing ?
What is tilling? What purpose does it serve?
If matchstick provide heat, then what is the fuel here? If there is no fuel here then how does it burn?
What is slow combustion?
True/False
a) Burning of coal in termal power plants can result in acid rain.
b) The ignition temperature of coal is high;hence it is easy to ignite.
why does the paper cup containing water not catch fire on heating ?