S-block elements practice · Mixed difficulty

STATEMENT-1: The lithium ion itself, and also its compounds, are more heavily hydrated than those of the rest of the group members.

STATEMENT-2 : The $L i^{+}$is smallest among alkali metals and polarise water molecules more easily than the other alkali metal ions.

The correct statement (s) among I to III with respect to potassium ions that are abundant within the cell fluids is/are
I. They activate many enzymes.
II. They participate in the oxidation of glucose to produce ATP.
III. Along with sodium ions, they are responsible for the transmission of nerve signals.

In context with Beryllium. Which one of the following statement is incorrect.

The ashes of plants contain alkali metals, 90% of which is:

Mixture of $\mathrm{MgC}{\mathrm{l}_2}\mathrm{and MgO}$ is called

Identify the correct statements about alkali metals.
A. The order of standard reduction potential $\left(\mathrm{M}^{+} \mid \mathrm{M}\right)$ for alkali metal ions is $\mathrm{Na}>\mathrm{Rb}>\mathrm{Li}$.
B. $\text{CsI}$ is highly soluble in water.
C. Lithium carbonate is highly stable to heat.
D. Potassium dissolved in concentrated liquid ammonia is blue in colour and paramagnetic.
E. All the alkali metal hydrides are ionic solids.
Choose the correct answer from the options given below.

Most abundant salt of sodium in nature is:

Sodium carbonate contains:

Which of the following hydroxides is amphoteric in nature?

Given below are two statements, one is labelled as
Assertion A and the other is labelled as Reason R.

Assertion A : Beryllium has less negative value of
reduction potential compared to the other alkaline
earth metals.

Reason R: Beryllium has large hydration energy
due to small size of ${Be}^{2+}$ but relatively large value
of atomization enthalpy.
In the light of the above statements, choose the
most appropriate answer from the options given
below.

Which of the compounds of cement sets at the slowest rate?

The value of $n$ in the molecular formula $Be{}_n^{}\mathrm{A}{\mathrm{I}_2}\mathrm{S}{\mathrm{i}_6}{\mathrm{O}_{18}}$ is

When ammoniacal solution of common salt is saturated with carbon dioxide, we get:

A: Molten ${BeCl}_2$ is poor conductor of electricity but ${BaCl}_2$ liquid is a good conductor.

R: Small cations are more hydrated than large cations.

The ease of adsorption of the hydrates alkali metal ions on an ion-exchange resins follows the order:

Assertion (A) : $\mathrm{KO}_2$ is paramagnetic.

Reason (R) : $\mathrm{K}^{+}$ion has unpaired electron.

A gas reacts with $\mathrm{CaO}$ and not with $\mathrm{NaHC}{\mathrm{O}_3}$ is:

Consider the following statements
(a) Density of sodium is more than potassium.
(b) Potassium carbonate is manufactured by Solvay process
(c) $LiN{O_3}$ evolves $N{O_2}$ gas on heating but $NaN{O_3}$ does not
The correct statement(s) is/are

The order of melting point is

In India, at the occasion of marriages, the fireworks used give green flame. Which one of the following radicals may be present?

${CaCO}_3 \rightleftharpoons {CaO}+{CO}_2$ reaction in a line goes to completion because

The decreasing order of second ionization energy of K, Ca and Ba is:

Soda ash is chemically:

Which of the following are found in biological fluids $\mathrm{Na}^{+}$, $\mathrm{Mg}^{2+}, \mathrm{Ca}^{2+}, \mathrm{K}^{+}, \mathrm{Sr}^{2+}, \mathrm{Li}^{+}$and $\mathrm{Ba}^{2+}$

Metallic magnesium is prepared by

An oxide of alkaline earth metals $X$ reacts with carbon and ${Cl}_2$ to give a compound ${Y}$. ${Y}$ is found in polymeric chain structure and is electron deficient molecule. The compound ${Y}$ is

The reaction of water with sodium and potassium is:

Which one of the following processes is used for manufacture of calcium?

Siedlitz powder contains:

$\mathrm{K}_2 \mathrm{CO}_3$ cannot be prepared by Solvay's process because