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Total number of alkali metal (non radioactive) which produce mainly superoxide when burnt with excess of $O_{2}$ :-

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Important Questions on The s-Block Elements

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

A metal on combustion in excess air forms

X

X

upon hydrolysis with water yields

H_{2} O_{2}

and

O_{2}

along with another product. The metal is:

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

The metal that forms nitride by reacting directly with

N_{2}

of air is:

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

Magnesium is burnt in the air to form

A

and

B

. When

B

is hydrolyzed,

C

and

D

are formed.

D

is the reactant in the manufacture of nitric acid by Ostwald's process. What is

C

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

Dihydrogen is liberated when water reacts with

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of:

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

Sodium dissolves in liquid

{NH}_{3}

to give a deep blue solution. This is due to;

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

When sodium

(Na)

metal is dissolved in liquid ammonia

({NH}_{3})

, it imparts a blue colour to the solution. This blue coloration is due to:

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

A metal

' M'

readily gives

{MSO}_{4},

which is soluble in water. It forms its oxide

M 0

which is amphoteric. It forms an insoluble hydroxide

M (OH)_{2},

which is soluble in

NaOH

solution. The

M

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

On combustion of

Li, Na

and

K

in excess of air, the major oxides formed, respectively, are:

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

The oxide of potassium that does not exist is

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

A piece of

Mg

ribbon is heated to redness in nitrogen atmosphere and the treated with water. The gas evolved is

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

Magnesium powder burns in air to give

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

A s-block element (M) reacts with oxygen to form an oxide of the formula

{MO}_{2}

. The oxide is pale yellow in colour and paramagnetic. The element

(M)

is:

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

The element whose salts cannot be detected by flame test is.

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

Assertion (A):

K, Rb

and

Cs

form superoxides
Reason (R): The stability of superoxides increases form

K

Cs

due to decrease in lattice energy.

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

Which one of the following options is correct pertaining to the below transformations?

Na + {NH}_{3} (l) ⟶

Coloured solution

\overset{on standing}{⟶} X + Y

HARD

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

Powdered Beryllium burns in air to give

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

The order of stability for the super oxides is

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

Name a nitrate that does not yield corresponding metal oxide, nitrogen dioxide on heating.

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Reactions of Alkali Metal Elements

The main oxides formed on combustion of Li, Na and K in excess of air are respectively:

Total number of alkali metal (non radioactive) which produce mainly superoxide when burnt with excess of O2 :-

Important Questions on The s-Block Elements

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Total number of alkali metal (non radioactive) which produce mainly superoxide when burnt with excess of $O_{2}$ :-