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The number of unpaired electrons in a chromic ion Cr3+ (atomic number = 24) is:
(1) 6
(2) 4
(3) 3
(4) 1
Ans: 3
Which of the following is not isoelectronic : (1) Na + (2) Mg 2+ (3) O 2- (4) Cl - Ans:(d)Cl -
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Method for Detection of Elements - Phosphorus Phosphorus is detected through fusing the organic compound along with sodium peroxide while phosphorus is converted into sodium ph
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