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JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
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Choose the correct coding for following statements. Here stands for True and stands for False statement.
(i) Mendeleev left several gaps in his periodic table for the undiscovered elements.
(ii) The gap under aluminium and a gap under silicon was left and these elements were called Eka aluminium and Eka silicon.
(iii) Germanium was placed in place of Eka-aluminium and gallium was placed in place of Eka silicon.
(i) Mendeleev left several gaps in his periodic table for the undiscovered elements.
(ii) The gap under aluminium and a gap under silicon was left and these elements were called Eka aluminium and Eka silicon.
(iii) Germanium was placed in place of Eka-aluminium and gallium was placed in place of Eka silicon.
View answer and explanation
Correct option: C
TTF
Option C (TTF) is correct because Mendeleev did leave gaps, he predicted Eka-aluminum and Eka-silicon, but Germanium replaced Eka-silicon while Gallium replaced Eka-aluminum.
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