Question

Which one of the following alkali metal gives hydrated salts?

(i) Li (ii) Na (iii) K (iv) Cs

Solution

Li. Since the size of Li⁺ is the smallest among the alkali metal ions, therefore it has the highest charge density and hence attracts the water molecules more strongly than any other alkali metal cation.

Some More Questions From The s-Block Elements Chapter

Why caesium can be used in photoelectric cell while lithium can not be?

In aqueous solution, Li⁺ ion has lowest mobility. Why?

Lithium has highest ionisation energy in group 1 elements, yet it is strongest reducing agent. Comment.

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The S-Block Elements

Which one of the following alkali metal gives hydrated salts?

(i) Li (ii) Na (iii) K (iv) Cs

Some More Questions From The s-Block Elements Chapter

Why caesium can be used in photoelectric cell while lithium can not be?

In aqueous solution, Li⁺ ion has lowest mobility. Why?

Lithium has highest ionisation energy in group 1 elements, yet it is strongest reducing agent. Comment.

The softness of group 1 elements increases down the group with increasing atomic number. Give reason.

Which is the most reactive alkali metal and why?

Why alkali metals do not form M²⁺ions?

Name the radio active element in group 1. How does it resemble with the remaining elements of the group?

Why alkali metals are normally kept in kerosene oil?

Why lithium cannot be stored in kerosene?

Why does lithium form complexes?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

The S-Block Elements

Which one of the following alkali metal gives hydrated salts?(i) Li (ii) Na (iii) K (iv) Cs

Some More Questions From The s-Block Elements Chapter

Why caesium can be used in photoelectric cell while lithium can not be?

In aqueous solution, Li+ ion has lowest mobility. Why?

Lithium has highest ionisation energy in group 1 elements, yet it is strongest reducing agent. Comment.

The softness of group 1 elements increases down the group with increasing atomic number. Give reason.

Which is the most reactive alkali metal and why?

Why alkali metals do not form M2+ ions?

Name the radio active element in group 1. How does it resemble with the remaining elements of the group?

Why alkali metals are normally kept in kerosene oil?

Why lithium cannot be stored in kerosene?

Why does lithium form complexes?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Which one of the following alkali metal gives hydrated salts?

(i) Li (ii) Na (iii) K (iv) Cs

In aqueous solution, Li⁺ ion has lowest mobility. Why?

Why alkali metals do not form M²⁺ions?