Sodium metal can be kept in:

Important Questions on The s-Block Elements

MEDIUM

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

The metal that forms nitride by reacting directly with ${\mathrm{N}}_2$ of air is:

MEDIUM

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

Magnesium is burnt in the air to form $\mathrm{A}$ and $\mathrm{B}$. When $\mathrm{B}$ is hydrolyzed, $\mathrm{C}$ and $\mathrm{D}$ are formed. $\mathrm{D}$ is the reactant in the manufacture of nitric acid by Ostwald's process. What is $\mathrm{C}$ ?

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

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

Sodium dissolves in liquid ${\mathrm{NH}}_3$ to give a deep blue solution. This is due to;

MEDIUM

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

When sodium $\left(\mathrm{Na}\right)$ metal is dissolved in liquid ammonia $\left({\mathrm{NH}}_3\right)$, 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

A metal $\text{'}\mathrm{M}\text{'}$ readily gives ${\mathrm{MSO}}_4,$ which is soluble in water. It forms its oxide $\mathrm{M}0$ which is amphoteric. It forms an insoluble hydroxide $\mathrm{M}(\mathrm{OH}{)}_2,$ which is soluble in $\mathrm{NaOH}$ solution. The $\mathrm{M}$ is

EASY

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

On combustion of $\mathrm{Li}, \mathrm{Na}$ and $\mathrm{K}$ in excess of air, the major oxides formed, respectively, are:

EASY

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

The oxide of potassium that does not exist is

EASY

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

A piece of $\mathrm{Mg}$ 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>Group 1 Elements: Alkali Metals

Magnesium powder burns in air to give

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 ${\mathrm{MO}}_2$. The oxide is pale yellow in colour and paramagnetic. The element $\left(\mathrm{M}\right)$ is:

EASY

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

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

MEDIUM

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

Assertion (A): $\mathrm{K}, \mathrm{Rb}$ and $\mathrm{Cs}$ form superoxides
Reason (R): The stability of superoxides increases form $\mathrm{K}$ to $\mathrm{Cs}$ 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?
$\mathrm{Na}+{\mathrm{NH}}_3\left(\mathrm{l}\right)⟶$ Coloured solution $\stackrel{\text{ on standing }}{⟶}\mathrm{X}+\mathrm{Y}$

HARD

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

Powdered Beryllium burns in air to give

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

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

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: