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NCERT Based Test: Genesis of Periodic Classification - NEET MCQ


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5 Questions MCQ Test NCERTs at Fingertips: Textbooks, Tests & Solutions - NCERT Based Test: Genesis of Periodic Classification

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NCERT Based Test: Genesis of Periodic Classification - Question 1

Which of the following is not a merit of Mendeleev's periodic table?

Detailed Solution for NCERT Based Test: Genesis of Periodic Classification - Question 1

Mendeleev could not give separate places to isotopes which had different atomic weights in the periodic table

NCERT Based Test: Genesis of Periodic Classification - Question 2

What were the main demerits of Mendeleev's periodic table?
(i) Hydrogen has been placed in group I though it resembled to group VII as well.
(ii) Positions of some elements was not justified.
(iii) Isotopes were not given separate places.
(iv) Lanthanides and actinides were not included in the table.

Detailed Solution for NCERT Based Test: Genesis of Periodic Classification - Question 2

All are the demerits of Mendeleev's periodic table.

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NCERT Based Test: Genesis of Periodic Classification - Question 3

Law of octaves stated

Detailed Solution for NCERT Based Test: Genesis of Periodic Classification - Question 3

Newland's Law of octaves stated that if elements (known at Newland's time) were arranged in increasing order of their atomic weights, every eighth element had properties similar to the first element. For example, Li and Na have similar properties.

NCERT Based Test: Genesis of Periodic Classification - Question 4

The periodic table of today owes its development to two chemists namely:

Detailed Solution for NCERT Based Test: Genesis of Periodic Classification - Question 4

The periodic table of today owes its development to two chemists namely the Russian chemist Dmitri Mendeleev and the German chemist J. Lother Meyer. In 1869, they independently proposed that when the elements are arranged in the increasing order of their atomic weights, similarities in physical and chemical properties appear at regular intervals.

NCERT Based Test: Genesis of Periodic Classification - Question 5

The first periodic law stated by Mendeleev was:

Detailed Solution for NCERT Based Test: Genesis of Periodic Classification - Question 5

The first periodic law stated by Mendeleev was, "the physical and chemical properties of the elements are a periodic function of their atomic weights (atomic masses)." The elements having similar properties appeared in the same group (vertical column).

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