Flame
Which zone of the flame has unburnt wax vapors
The inner most zone
What do you think coal is made up of?
Its made up of Carbon
I can keep a swimming pool clean, but I can poison you as well. What am I?
Chlorine
Describe calorific value?
The amount of heat energy produced on complete combustion of 1 kilogram of a fuel.
How many zones are there in a flame
There are three zones in a flame
Outer Zone
Middle Zone
Inner Zone
Lia has a bunch of paper which aren't in use she decides to bury them in her backyard. After she dies many year past her house is sold to a constructional site they dig her backyard for constructional proposes after digging too long they found a blackish colour stone. What is the name of that stone? what had happened to it?
The name of the stone is Coal.
The paper she buried has turned into coal by carbonization
What is black when you purchase it, red while you are using it, and gray when you discard it?
Charcoal
Calorific Value is equal to______?
Amount of heat produced / Weight of fuel burnt
Describe the outer zones of flame?
Outer Zone: This zone is blue in colour. It is the hottest part of the flame, because complete combustion takes place in this zone. This is the non-luminous part of the flame.
Can coal be prepared in laboratory or industry? why?
Coal is a fossil fuel and it cannot be prepared in laboratory or industry because the formation of coal: (A) is a very slow process.
(B) needs very low pressure and low temperature. (C) needs very high pressure and high temperature.
I can protect you from the sun’s strong rays. You can apply me on your skin to prevent sunburn. What am I?
Zinc
What is the calorific value of Methane?
Methane's calorific value is 50000
Describe the middle zones of flame?
Middle Zone: This zone is yellowish orange in colour. This zone is moderately hot because partial combustion takes place in this zone. This is the luminous (light giving) part of the flame.
Name two products that you obtain from the destructive distillation of coal?
The two important products obtained from the destructive distillation of coal are:
Coal gas and coal tar.
What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?
"A man."
As a baby, a human goes about on all fours ("four legs in the morning"; morning = childhood), until he learns to walk, which he does so well into adulthood ("two legs in the afternoon"; afternoon = adulthood), until old age requires him to use a cane to support himself ("three legs in the evening", evening = old age), finally he dies ("no legs at night", night = death).
Explain how the use of CNG in automobiles has reduced pollution in our cities
The use of diesel and Petrol as fuel in automobiles is being replaced by CNG, because CNG produces less harmful substances. its a cleaner fuel
Describe the inner zones of flame?
Inner Zone: This zone is dark in colour. This is the coolest part of the flame because no combustion takes place in this zone.
Name two products that you obtain from the destructive distillation of coal. What are the residue left in this process?
The two important products obtained from the destructive distillation of coal are: Coal gas and coal tar.
The residue left in this process is coke.
Which element is most reactive in the periodic table
Cesium
Burning of coal and diesel release ______gas
Sulfur Dioxide gas.