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Which of the sub-shell is circular:
(1) 4s
(2) 4f
(3) 4p
(4) 4d
Ans: 4s
how to calculate pH value?
The number of electrons in the nucleus of C 12 is (1) 6 (2) 12 (3)0 (4)3 Ans: 0
1000
Physical properties of Aromatic Nitro Compounds (a) Aromatic nitro compounds are insoluble in water although soluble in organic solvents. (b) They are either pale yellow liq
Q. What do you mean by Emulsions? Emulsions, as you may already know by now, are colloidal dispersions of a liquid in another liquid with which it is immiscible. Emulsions can
In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom
Unsaturated dicarboxylic acids The molecular formula of the simplest unsaturated dicarboxylic acid is HOOC.CH=CH.COOH This formula, however represents two chemical compounds, m
Write chemical equations 1 the reactions involved in the manufacture of potassium permanganate from pyrolusite ore What are enantiomers? Draw the structures of the possible e
Elements of Group 13 are less metallic than those of groups 1 and 2. Within the group, there is a variation in metallic character. Boron, the smallest element in this group is a no
show me the procedure for the separation of basic radicals
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