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We Provides you all imp articles and other Important things of Geography and Economy for your CSE Exam
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The latest Messages
2021-09-07 16:20:59
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2021-09-07 15:47:29
Pdf book for Mapping Topics
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2021-09-07 15:36:07
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2021-09-04 21:11:00
Only for tonight
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2021-09-04 21:07:09
Last 18 months Current Affairs based MCQs
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2021-09-04 19:34:07
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2021-09-03 19:22:44
https://t.me/joinchat/VbvZ2ZTgzlEBgw0x
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2021-09-03 14:11:01
■
CLASSIFICATION OF COAL.
1.
PEAT◇ Contains less than
40 to 55 per cent carbon (has more impurities).
◇ Contains
sufficient volatile matter and
lots of moisture (gives out a lot of smoke when burnt cause pollution).
◇ Left to itself, it burns like wood, gives
less heat, emits more smoke and
leaves a lot of ash.Join:- https://t.me/UPSC_Geography_Economy_GS_Notes
147 views11:11
2021-09-03 11:11:01
■
STAGES OF COAL FORMATION.
◇
In the process of transformation (coalification),
1. Buried plants turn into peat,
2. Peat is altered to lignite,
3. lignite is altered to sub-bituminous,
4. sub-bituminous coal is altered to bituminous coal, and
5. bituminous coal is altered to anthracite (oldest, best quality coal).Join:- https://t.me/UPSC_Geography_Economy_GS_Notes
150 views08:11
2021-09-03 09:10:06
■
FORMATION OF COAL.
◇ Most of the world’s coal was formed in
Carboniferous age (350 million years ago.)
◇ Name Carboniferous refers to
coal-bearing strata.
◇ Coal formed
millions of years ago when the earth was covered with
huge swampy (marshy) forests. ◇ As plants grew, some
died and
fell into the swamp waters. ◇ New plants grew up to take their places and when these died more grew.
◇ In time, there was
thick layer of dead plants rotting in the swamp. ◇ Surface of the
earth changed, and
water and dirt washed in, stopping the decaying process.
◇ More plants grew up, but they too
died and
fell,
forming separate layers.
◇ After millions of years many layers had formed, one on top of the other.
◇ W
eight of the top layers and the
water and
dirt packed down the lower layers of plant matter.
◇
Heat and
pressure produced chemical and
physical changes in the plant layers which forced out oxygen and
left rich carbon deposits. In time, material that had been plants became coal.
218 views06:10