Which one of the following pairs is isostructuram
(re having the same shape and hybridization)
bcl3,nf3
BF4 h2o
BF4, no3-
Bf4 ,sicl4
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The layer of soil which is just below the top-soil is called B-horizon. It is also known as sub-soil. The sub-soil is made up of slightly bigger rock particles than that of top-soil. ... The sub-soil has very little humus (decayed organic matter).
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