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Q.

Choose the given statement as True/False:

In the year 1812, Johann Wolfgang Döbereiner, a German chemist tried to arrange the elements with similar properties into groups.

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a

True

b

False

answer is B.

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Detailed Solution

The above statement is false.

Johann Wolfgang Döbereiner organized the elements with comparable properties into groups in 1817. These groups were known as 'Triads'. The atomic mass of the middle element in a triad was nearly equal to the average of the atomic masses of the other two elements. Triads were written in the order of increasing atomic masses.

The correct statement would be, In the year 1817, Johann Wolfgang Döbereiner, a German chemist tried to arrange the elements with similar properties into groups.

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