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The S-Block Elements

Question

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Write two properties of lithium carbonate in which it differs from other alkali metal carbonates.

Solution

(i) Lithium carbonate decomposes on heating to give Li₂O. The carbonates of other alkali metals are thermally stable.

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(ii) Lithium carbonate is less soluble in water as compared to carbonates of other alkali metals.

Some More Questions From The s-Block Elements Chapter

What are s-block elements?

Why are alkali metals not found in nature?

Lithium shows similarities to magnesium in the chemical behaviour. What is the cause of this similarity?

What is the nature of lithium compounds?

Group 1 elements are called alkali metals. Why?

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?

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