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4. At the time of Mendeleev, the number of elements known was (a) 63 (b) 65 (c) 62 (d) 64

4. At the time of Mendeleev, the number of elements known was
(a) 63
(b) 65
(c) 62
(d) 64

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 60796 Points
one year ago
Answer: a

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