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CBSE - VIII - Science - Coal and Petroleum
story of coal
Asked by asthachakole
24th July 2023,
9:17 PM
CBSE - VIII - Science - Coal and Petroleum
Dear Mam/Sir Coal is a fossil fuel so why cant it be both dead plants and animals form coal when the are decayed
Asked by desaitd
6th June 2023,
8:39 PM
CBSE - VIII - Science - Coal and Petroleum
what is coll
Asked by mukteshwarSingh
29th December 2021,
10:15 AM
CBSE - VIII - Science - Coal and Petroleum
why it is hard And Burns with less smoke
Asked by varshusneha
8th December 2021,
2:04 PM
CBSE - VIII - Science - Coal and Petroleum
Least polluting fuel for vehicles is __________
Asked by gouruplakshya
12th October 2021,
4:42 PM
CBSE - VIII - Science - Coal and Petroleum
what is coal
Asked by vudhpalsighbudhpal
27th August 2021,
7:55 PM
CBSE - VIII - Science - Coal and Petroleum
explain why fossil fuels are exhaustible natural gas
Asked by skumarjha510
29th July 2021,
7:54 PM
CBSE - VIII - Science - Coal and Petroleum
what is coal?
Asked by teacher5.edubuddy
13th April 2021,
12:18 PM
CBSE - VIII - Science - Coal and Petroleum
Lowest carbon content ----
Asked by Neeta2816
20th January 2021,
4:29 PM
CBSE - VIII - Science - Coal and Petroleum
Narrate story of coal either through text or pictorial presentation or audio piece. Hint: The story should contain its formation and its useful products.
Asked by vareyanjningshen
22nd October 2020,
5:50 PM
CBSE - VIII - Science - Coal and Petroleum
Why are thermal power plants situated near coal mines?
Asked by yashswini0101
7th October 2020,
8:44 AM
CBSE - VIII - Science - Coal and Petroleum
types of coal
Asked by arvind300156
29th August 2020,
6:40 PM
CBSE - VIII - Science - Coal and Petroleum
why petroleum is known as black gold
Asked by shashwatbipuli
26th July 2020,
5:13 PM
CBSE - VIII - Science - Coal and Petroleum
What is the composition of coal??
Asked by tanvigholap99
8th August 2019,
9:44 PM
CBSE - VIII - Science - Coal and Petroleum
Why is coke more porous than bituminous coal
Asked by jayshreehase1985
2nd August 2019,
7:07 PM
CBSE - VIII - Science - Coal and Petroleum
ईधन को जलाने के लिए हमें उसे उसके desh तक गम करना पड़ता है answer
Asked by ss720023
4th October 2018,
8:51 PM
CBSE - VIII - Science - Coal and Petroleum
why coal is only made in abscence of air?which bacteria make it?
Asked by rkghunawat1981
21st August 2018,
9:57 PM
CBSE - VIII - Science - Coal and Petroleum
tell full process of reffing of petroleum
Asked by rkghunawat1981
11th August 2018,
11:11 AM
CBSE - VIII - Science - Coal and Petroleum
the substance Q is a fossil fuel'It occurs deep below the ground in certain areas of earth.another fossil fuel p is found trapped above the deposits Q.when Q is subjected to the process R the no of products are collected at different temperatue ranges which are put to different uses, a special grade of product S obtained in this way is used as aviation fuel in jet airplanes.what are Q and P? what are physical states of Q AND p name the procee R nme theproduct S
Asked by arajeevshashank
4th July 2018,
7:44 PM
CBSE - VIII - Science - Coal and Petroleum
which fuel is used in rockets
Asked by arajeevshashank
4th July 2018,
7:33 PM
CBSE - VIII - Science - Coal and Petroleum
What is natural gas? Why is it called a clean fuel?
Asked by polygonpatna
19th September 2017,
4:13 PM
CBSE - VIII - Science - Coal and Petroleum
(a) What is coal? (b) "Coal is a source of energy". Explain. (c) What is the real source of energy of coal?
Asked by Topperlearning User
2nd April 2015,
7:24 AM
CBSE - VIII - Science - Coal and Petroleum
What is diesel? How is it different from petrol?
What is diesel? How is it different from petrol?
Asked by
20th July 2014,
11:31 AM
CBSE - VIII - Science - Coal and Petroleum
(a) What is destructive distillation of coal? (b) What are the various products of coal obtained by destructive distillation of coal? Explain them along with their uses.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
(a) Why is solar energy considered the real source of energy of coal? (b) Give uses of coal (any six).
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
A gas is obtained during destructive distillation of coal. Identify the gas. How is it useful?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
A substance is black liquid obtained during destructive distillation of coal. It is thick and smells unpleasant. It is a mixture of hundreds of substances. Identify the substance. How it is useful to us?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
A substance is a black, hard and porous which is almost the purest form of carbon and is obtained by destructive distillation of coal. Identify the substance and write its uses.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
Describe the formation of coal.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
To which process coal is put to get some useful products? Explain the process and name the products obtained from the process.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
A substance that is black hard stone which is formed by dead remains of the living organisms and is mainly used as fossil fuel. Identify that substance and write its uses.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
(a) Which product of coal is used in anti-dandruff shampoos.State its any other use. (b) How is it obtained?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
Why is it necessary to use coal economically?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
How many kinds of natural resources are there on the basis of availability of materials? Define them and give examples for each.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
Why can't we prepare coal in our laboratories?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
What is the use of coal in thermal plants?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
Give two uses of coal tar.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
We can use inexhaustible resource in unlimited quantity. Why?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
How are fossil fuels formed?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
Justify the statement: Coal is formed by carbonisation.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
Do you think coal will be available in many years to come? Why?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
Man is trying to use other energy sources in place of coal. Give two reasons.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
Coal is a fossil fuel. Give reasons.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
Why is coal used as fuel?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Coal and Petroleum
Why is it important to conserve coal?
Asked by Topperlearning User
4th June 2014,
1:23 PM
