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The following are some statements about ...

The following are some statements about Mendeleeff's periodic table
(i) It is based on increasing order of atomic numbers.
(ii) Mendeleef corrected the atomic weight of some elements like Be, In etc
(iii) `(Ar, H_(2)), (Co, CI_(2)), (Te, F_(2))` are three inverted pairs
(iv) It is based on increasing order of atomic weights

A

only (i) correct

B

(ii) & (iv) correct

C

only (iii) correct

D

only (iv) is correct

Text Solution

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The correct Answer is:
B
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NARAYNA-PERIODIC TABLE -All Questions
  1. Diagonal relationship is shown by

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  2. The pair of elements that have similar chemical properties are

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  3. The following are some statements about Mendeleeff's periodic table ...

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  4. Which of the following pairs of atoms have same number of electrons in...

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  5. The electronic configuration of an element is 1s^(2)2s^(2)2p^(6)3s^(2)...

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  6. The element present in the IIIA group and 3 period in the periodic tab...

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  7. The long form of periodic table is nothing but just a graphical repres...

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  8. In the sixth period, the orbitals being filled are

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  9. The number of valence electrons that can be present in the second elem...

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  10. At room temperature liquid metal and liquid non-metals are

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  11. Which of the following contains same number of elements

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  12. The statement that is false regarding the long form the periodic tabl...

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  13. Covalent bond length of chlorine molecule is 1.98A^(0). Covalent radiu...

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  14. In which of the following pairs, the first atom or ion is not large th...

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  15. The covalent radius of hydrogen is 0.37A^(0). The bond length in H(2) ...

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  16. In the isoelectronic species the ionic radii of N^(3-), O^(2-), F^(-) ...

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  17. Chloride ion and chlorine atom have

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  18. The covalent and Van der wall's radii of chlorine respectively are

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  19. The atomic radii of two elements "X" and "Y" are 0.72 A^(0) and 1.6A^(...

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  20. Among O,C,F,Cl and Br the increasing order of atomic radii is

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