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Hydrogen acts as a reducing agent and thus resembles

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Important Questions on The s-Block Elements

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 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

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

The metal that forms nitride by reacting directly with

N_{2}

of air is:

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 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:

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

Dihydrogen is liberated when water reacts with

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Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 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:

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

Sodium dissolves in liquid

{NH}_{3}

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

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

The order of stability for the super oxides is

HARD

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

Powdered Beryllium burns in air to give

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

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

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

On combustion of

Li, Na

and

K

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

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

A piece of

Mg

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

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

Magnesium powder burns in air to give

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 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:

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

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

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 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.

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

Alkali metals are highly reactive towards air and water and are generally kept in kerosene oil. Glove box is a sealed container filled with nitrogen gas used to handle such chemicals that are air sensitive and hazardous, Of the four pure metals - lithium, sodium, potassium, and rubidium the ones that can be stored in a glove box are:

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Chemical Properties of Group 1 Elements

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