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Eka-aluminium and Eka-silicon are known ...

Eka-aluminium and Eka-silicon are known as :

A

Gallium and Germanium

B

Aluminium and Silicon

C

Iron and Sulphur

D

Proton and Silicon

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The correct Answer is:
A
Eka-aluminium is knows as gallium and Eka-silicon is known as germanium because gallium is similar in properties to aluminium and one next to it and germanium is similar in properties to silicon and one next to it. (Eka in sanskrit means one)
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Eka-aluminium is

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The three elements predicted by Mendeleev from the gaps in his periodic table were known as eka-boron, eka-aluminium and eka-silicon. What names were given to these elements when they were discovered later on?

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Assertion (A): Mendeleev left the gap under aluminium and silicon and called these Eka-aluminium and Eka-silicon, respectively. Reason (R): Dobereiner arranged elements on the basis of increasing atomic number.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as : Assertion (A) : Mendeleev' left the gap under aluminium and silicon and called these Eka-aluminium and Eka-silicon, respectively. Reason (R) : Dobereiner arranged elements on the basis of increasing atomic number.

DINESH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-All Questions
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  2. Which among the following species has the highest ionisation energy ?

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  3. Eka-aluminium and Eka-silicon are known as :

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  4. Which of the following order is wrong-

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  5. Which is true about the electronegative order of the following element...

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  6. The element with atomic number 56 belongs to which block ?

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  7. Which of the following order is correct for the first ionozation poten...

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  8. Electron affinity depends on

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  9. Which of the following is correctly matched?

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  10. Which of the following is not isoelectronic ?

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  11. Two elements whose electronegativities are 1.2 and 3.0 the bond formed...

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  12. The ions O^(2-), F^(-), Na^(+), Mg^(2+), and Al^(3+) are isoelectronic...

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  13. According to the Periodic Law of elements, the Variation in properties...

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  14. Which one of the following groupings represents a collection of isoele...

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  15. Arrange in order of increasing I.P.

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  16. Number of elements present in 5th period is

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  17. What is the general outer electronic configuration of the coinage meta...

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  18. How does the ionisation energy of 1st group elements very ?

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  19. The electron gain enthalpy values (in kJ mol^(-1) ) of three halogens,...

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  20. An atom with high electronegativity has

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