Recent content by Hfzshk
-
H
SOLVED PAPER
Description TYBMS SEM 6TH COAL Coal (from the Old English term col, which has meant "mineral of fossilized carbon" since the 13th century) [1] is a combustible blac or brownish!blac sedimentary rocusually occurring in roc strata in layers or "eins called coal beds or coal seams# $he harder...