Anomalous Properties of Lithium and Beryllium

IMPORTANT

Anomalous Properties of Lithium and Beryllium: Overview

This topic covers concepts, such as, Anomalous Properties of Beryllium, Covalent Nature of Beryllium, Reactions of Beryllium and Aluminium with Halide & Use of Beryllium and Aluminium Halides in Friedel Craft's Reaction etc.

Important Questions on Anomalous Properties of Lithium and Beryllium

HARD
IMPORTANT

Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in:

MEDIUM
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A metal M readily forms water soluble sulphate   MS O 4 .  Water insoluble hydroxide   M (OH) 2  and oxide MO which becomes inert on heating. The hydroxide is soluble in NaOH. Then M is

EASY
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Write a short note on beryllium oxide.

EASY
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Like aluminium, beryllium is not readily attacked by acids because of the presence of an oxide film on the surface of the metal. This exhibits _____ between beryllium and aluminium.

EASY
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Both aluminium and beryllium remain passive towards acids.

EASY
IMPORTANT

Explain how beryllium and aluminium reacts with an acid. Name the phenomenon exhibited by these two metals.

EASY
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Mention the reason for the anomalous behaviour of beryllium. Give its uses.

EASY
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Mention the catalyst used in the Friedel craft's reactions.

EASY
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Complete the given reaction of aluminium with sodium hydroxide:

2Al+2NaOH+6H2O         2NaAlOH4+?

EASY
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Identify the product of the reaction between beryllium and sodium hydroxide:

Be+2NaOH+2H2O         ?+H2

EASY
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Explain the reaction of beryllium with concentrated acid.

EASY
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Beryllium is kinetically inert to water because of the formation of 

EASY
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Beryllium can exhibit a coordination number of 4 in its compounds.

EASY
IMPORTANT

Why is beryllium kinetically inert to water?

EASY
IMPORTANT

Beryllium does not show the coordination number more than 

EASY
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Does beryllium react with water?

EASY
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Beryllium and aluminium are made passive by concentrated nitric acid.

EASY
IMPORTANT

Explain the inertness of beryllium and aluminium with concentrated acids.

 

EASY
IMPORTANT

Write the reaction of beryllium with sodium hydroxide.

EASY
IMPORTANT

Write the reaction of aluminium with sodium hydroxide.