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How many unpaired electrons are present in cobalt [Co] metal: (1) 2 (2) 3 (3) 4 (4) 7 Ans: 3
Identify an equation that describes some chemical process. Your equation should have at least two parameters, at least one of which should contribute in a non-linear way. Here
Explain why nichrome and not copper is used as heating element whereas manganin is used as standard resistance? For heating elements, primary requirements are high melting poin
Which among the following species have the same number of electrons in its outermost as well as penultimate shell: (1) Mg 2+ (2) O 2-
Lanthanide contraction
The band model of solids is an extended of the molecular orbital (MO) method. The overlap of atomic orbitals in an extended solid produces rise to continuous bands of electronic en
what is the chemistry behind the reactions of confirmatory test of sulphide radical of dilute acid group.
Most of the transition metal do not displace hydrogen from dilut acid. why? Ans) The activity series of transition metals is less than that of hydrogen so they can not displace h
Reaction of ammonia with diborane at 475K gives a compound B3N3H6 known as borazine or borazole: Borazine is best prepared by reducing B-trichloroborazme with sodium borohy
In the industrial production of sulphuric acid, SO 3 is carefully reacted with water: SO 3 + H 2 O → H 2 SO 4 any excess SO 3 giving rise to what is called oleum, a solut
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