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Assertion :- Metallic character increase...

Assertion :- Metallic character increases on going down the group
Reason :- I.E. decreases on going down the group

A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.

C

If Assertion is True, but the Reason is False.

D

If both Assertion & Reason are false

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The correct Answer is:
A
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Metallic nature increases moving down the group because:

Assertion: Metallic character of first group metals of Mordern periodic table increase on moving down the group. Reason: On moving top to bottom in first group in Modern periodic table, value of ionisation enthalpy continuously decreases.

(a) Electropositive nature of the element(s) increases down the group and decreases across the period (b) Electronegativity of the element decreases down the group and increases across the period (c) Atomic size increase down the group and decreases across a period (left to right) (d) Metallic character increases down the group and decreases across a period On the basis of the above trends of the periodic table, answer the following about the electron with atomic number 3 to 9 (a) Name the most electropositive element among them (b) Name the most electronegative element (c) Name of the element with smallest atomic size (d) Name the element which is a metalloid (e) Name the element which shows maximum valency.

ALLEN-Periodic Table -All Questions
  1. The first ionisation enthalpy (Delta(i)H^(o-)) values of the third per...

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  2. Which one of the following statements is incorrect in relation to ioni...

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  3. The IP(1),IP(2),IP(3),IP(4) and IP(5) of an element are 7.1, 14.3, 34....

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  4. Which process required maximum energy :-

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  5. To which the following atom, the attachment of electron is most diffic...

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  6. The element having very high ionization enthalpy but zero electron af...

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  7. Which of the following statement is correct regarding following proces...

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  8. Select equation having exothermic step:

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  9. Electron affinity of :

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  10. An atom with high electronegativity generally has :-

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  11. Assertion :- Cr belong to 4th period Reason :- Cr atom contain 4 sh...

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  12. Assertion :- First electrons affinity fo all element is positive. Re...

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  13. Assertion :- The first ionization energy of Be is greater than that of...

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  14. Assertion:- Mg^(2+) is smaller atomic size then F^(-) Resaon :- Mg...

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  15. Assertion :- He has highest I.E among all elements. Reason :- He ha...

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  16. Assertion :- Metallic character increases on going down the group R...

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  17. Assertion :-HCl is more polar than HF. Reason :- Cl has more E.N. t...

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  18. Match the following columns

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  19. Match the following columns

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  20. Match the following columns

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