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Electron occupies the available orbital singly before pairing in any one orbital occurs, it is:
(1) Pauli's exclusion principle
(2) Hund's Rule
(3) Heisenberg's principle
(4) Prout's hypothesis
Ans: Hund's Rule
Ionic compounds do not have: (1) Hard and brittle nature (2) High melting and boiling point (3) Directional properties (4) Soluble in polar solvents Ans: Direction
anomalous behaviour of beryllium
Be's 4th electron will have four quantum numbers: n l m s (1) 1 0 0 +1/2 (2) 1 1 +1 +1/2
What are three modifications to a polymer that can make it transparent? How will these modifications affect the mechanical properties of the polymer?
Anomalous behaviour of carbon and silicon
The electronic configuration of silver atom in ground state is: (1) [ Kr]3 d 10 4 s 1 (2) [Xe]4f 14 5d 10 6s 1 (3) [ Kr]4d 10 5 s
Conversion of phenol to salicyclic acid
what is radiometric titration
Extension
what are metal carbonyls and its cllasification?what is the main reason for the stability of different metal carbonyls
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