Q18 of 59 Page 30

In the following questions two or more options may be correct.

Which of the following statements are correct?


Helium has a small size and stable electronic configuration due to which it has the highest first ionization enthalpy in the periodic table.

The atomic radii of alkali is greater due to less effective nuclear charge on the outermost electrons due to their electron donating tendency.

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16

In the following questions two or more options may be correct.

Which of the following sequences contain atomic numbers of only representative elements?


 17

In the following questions two or more options may be correct.

Which of the following elements will gain one electron more readily in comparison to other elements of their group?


 19

In the following questions two or more options may be correct.

Which of the following sets contain only isoelectronic ions?


 20

In the following questions two or more options may be correct.

In which of the following options order of arrangement does not agree with the variation of property indicated against it?