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An ion has 18 electrons in the outermost shell, it is:
(1) Cu+
(2) Th4+
(3) Cs+
(4) K+
Ans: Cu+
Write chemical tests to distinguish among: a) Phenol and Benzoic acid b) Propanal and propanone c) Formic acid and Acetic acid
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Borosilicate glass: in this boric anhydride is used in place of lime. This glass generally contains 75-81% silica, 10-13.5% B 2 O 3 , 4.5-6% Na 2 O and 2-5% Al 2 O 3 . Sometimes Z
Indicate whether the following thermal reactions are allowed concerted reactions by the Woodward-Hoffmann criteria. Classify the reaction according to type. On the basis of
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