Select Board & Class
WHAT IS THE FULL FORM OF CNG AND LPG ?????????
list out 10 combustible materials and 10 non combustible materials
WHY DO WE WRAP A BLANKET AROUND A PERSON WHOSE CLOTHES CAUGHT FIRE
What is S.I unit of calorific value?
why hydrogen not used as a fuel ?
Is rusting of iron a combustion process ?
what is ideal fuel?
What is the difference between burning of coal and burning of candle ?
What is rapid combustion?Give 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?
how is cough formed in our body?????
why do you have to use paper or kerosene oil to start fire in wood or coal
list some characteristics of an ideal feul?
oxygen, nitrogen, carbondioxide, carbon monoxide--------which is odd one out and why
how many types of combustion are there explain them
Why does a goldsmith blow the outermost zone of a flame with metallic blowpipe for melting gold and silver?
difference between rapid combustion , spontaneous combustion and explosion
what is structure of flame?
distinguish between combustible and non combustible substances ,giving three examples of each
all combustible substance are not fuel. Why??
on what factor the calorific value of a fuel depends?
some judicious use of fossil fuels.
what is ideal fuel.
What is the difference between Spontaneous, rapid and explosion type of combustion
What are inert gases?give some examples?
what's the advantage of fish having a streamlined body ?
WHY WOOD SHAVINGS BURN MORE EASILY THAN A LOG WOOD?
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 ?
NAME ONE FUEL WHICH BURNS WITHOUT GIVING OFF WATER VAPOUR? AND WHY?
Explain the structure of a flame with the suitable diagram.
What is calorific value ?
why is phosphorous stored in kerosene and not in water or other such liquids ?
WHY DOES A MATCHSTICK BURN ON RUBBING IT ON THE SIDE OF THE MATCHBOX
What are foamite fire extinguishers? How do they work? Ther're explained in my CBSE Science book, but not in your site. I hope to get the answers as quick as possible. Thanks.
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.
name two solid fuels,two liquid fuels and two gasious fuel
Why do forest fire occurs during hot summers?
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 the difference between combustible and inflammable substances?
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 history of matchstick?
is carbondioxide is good conductor of heat or bad conductor and if bad conductor then why it can not be used to extinguish the fire caused by electrical shot circuits and how fire brigade get control over these types of electrical fire????????
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 are non-combustible substances? Explain with examples.
why should water not be used to put off fire caused by burning of petrol?
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
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.
why does the paper cup containing water not catch fire on heating ?
your LPG gas stove at home is giving a yellow flame. What can this mean?
a)Which of the following fuels is expected to leave a residue upon burning.
a)coal b)petrol c)LPG
what is the difference between combustion and burning?
what is meaning of kJ/g?
paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not
1 ) Which will catch fire first - kerosine or coal ? Why ?
2 ) Which fuel has the lowest calorific value ?
3 ) Compare - Ignition temperature of metals & Non-metals .
what precautions should be taken while using cng fuel in vehicles ? plss fasst i have just 9 hrs
Why does a matchstick not burn on its own?
why are some materials burn with flame while others without flame?
hope ans by meritnation expert
which zone of a flame does a goldsmith use for melting gold and silver and why
which part of the flame is innermost?dark zone or the blue zone?
What is tilling? What purpose does it serve?
What is slow combustion?
A better fuel leaves __________ (more/less) residue after combusion.
Copyright © 2021 Aakash EduTech Pvt. Ltd. All rights reserved.
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)