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Important Questions on The s-Block Elements

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Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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>Group 1 Elements: Alkali Metals

Which one among the following metals is the weakest reducing agent?

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

The compound which does not exist is

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Identify the weakest oxidizing agent among the following

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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:

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

The number of alkali metal(s), from

Li, K, Cs, Rb

having ionization enthalpy greater than

400 kJ {mol}^{- 1}

and forming stable super oxide is

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

The oxide of potassium that does not exist is

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Assertion (A):

K, Rb

and

Cs

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

K

Cs

due to decrease in lattice energy.

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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

Na + {NH}_{3} (l) ⟶

Coloured solution

\overset{on standing}{⟶} X + Y

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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:

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Magnesium powder burns in air to give

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

The metal that forms nitride by reacting directly with

N_{2}

of air is:

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

On combustion of

Li, Na

and

K

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

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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>Group 1 Elements: Alkali Metals

The order of stability for the super oxides is

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Identify the correct statements about alkali metals.

A. The order of standard reduction potential $(M^{+} | M)$ for alkali metal ions is $Na > Rb > Li$ .

B. $CsI$ is highly soluble in water.

C. Lithium carbonate is highly stable to heat.

D. Potassium dissolved in concentrated liquid ammonia is blue and paramagnetic.

E. All alkali metal hydrides are ionic solids.

Choose the correct answer from the options given below

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

Dihydrogen is liberated when water reacts with

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Group 1 Elements: Alkali Metals

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

Identify the correct statement:

Important Questions on The s-Block Elements

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