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Which of the following has maximum number of unpaired electron (atomic number of Fe 26):
(1) Fe
(2) Fe (II)
(3) Fe (III)
(4) Fe (IV)
Ans: Fe (III)
Physical properties of Phthalic Acid (a) Phthalic acid is colourless crystalline substance. (b) Phthalic acid's melting point is not sharp (195-213°C). (c) Phthalic acid
The nucleus of the element 21E^45 contains
90ml of an unknown concentrated chlorine was diluted with 2250l of water.The dilution now is 0.08mg/l. what is the initial concentration of the chlorine before dilution?
two containers are connected by a stopcock. gas A is at pressure 202kpa while gas B is at pressure 140kpa, what will be the resultant pressure when the stopcock is opened
ionic bonds are usually formed by combination of elements with
lithium and beryllium markedly differ from others members of their respective group
what is dilution process?
Number of electrons in -CONH 2 is: (1) 22 (2) 24 (3) 20 (4)28 Ans:24
What is sublimation?
(a) How is aniline obtained from benzene? (b) Why are the secondary amines more basic than primary amines? Describe. (c) Write the complete chemical reactions for the convers
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