Single Choice

Sodium dissolved in ammonia has blue colour due to:

Asolvated sodium molecule
Bamide ion
Csolvated electron
Correct Answer
Dlone pair of electrons on nitrogen in ammonia

Solution

Ammonia solution turns blue when alkali and alkaline earth metals are dissolved in it. The blue color of the solution is considered to be due to ammoniated electrons which absorb energy corresponding to red region of the visible light for the their excitation to higher energy levels. The transmitted light is blue which imparts blue color to the solutions.

SIMILAR QUESTIONS

p - block Elements

What are the products formed when ammonia reacts with excess chlorine?

p - block Elements

An aqueous solution of ammonia contains :

p - block Elements

A metal $$'M'$$ reacts with nitrogen gas to give $$'M_3N'$$. $$'M_3N'$$ on heating at high temperature gives back $$'M'$$ and on reaction with water produces gas $$'B'$$. Gas $$'B'$$ reacts with aqueous solutions of $$CuSO_4$$ to form a deep blue compound. $$'M'$$ and $$'B'$$ respectively are:

p - block Elements

Nitration of which among the following compounds yields cyclonite?

p - block Elements

Explain why NH3 is basic while BiH3 is only feebly basic.

p - block Elements

Match the column I with column II and mark the appropriate choice. Column I Column II (A) Laughing gas (i) Hydrazoic acid (B) Anhydride of $$HNO_{3}$$ (ii) Nitrous oxide (C) Anhydride of $$HPO_{3}$$ (iii) Nitrogen pentoxide (D) Acid hydride of nitrogen (iv) Phosphorus pentoxide

p - block Elements

Ammonia is a Lewis base. It forms complexes with cations. Which one of the following cations does not form complex with ammonia?

p - block Elements

Why does $$NH_{3}$$ act as a Lewis base?

p - block Elements

Give reasons for the following: Ammonia acts as a ligand.

p - block Elements

Write the balanced equation for the reaction between ammonia and sulphuric acid.

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