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  4. Which of the following is not correct for a group in Mendeleev’s periodic table ?

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Q. Which of the following is not correct for a group in Mendeleev’s periodic table ?

Classification of Elements and Periodicity in Properties

Solution:

(a) is correct because the groups are arranged from I to VIII including zero group.
(b) is incorrect because VIII group is not divided into sub groups.
(c) is correct.
(d) is correct.