The S Block Elements CBSE Questions & Answers

The S Block Elements

This is Chemistry Class 11 The s Block Elements CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
In the preparation of Sodium carbonate the by- product formed is:
  • A
    \({\text{Ca }}{\left( {{\text{OH}}} \right)_{\text{2}}}\)
  • B
    \({\text{N}}{{\text{H}}_{\text{4}}}{\text{Cl}}\)
  • C
    \({\text{N}}{{\text{H}}_{\text{3}}}\)
  • D
    \({\text{CaC}}{{\text{l}}_{\text{2}}}\)
    Correct
2
Washing soda is
  • A
    \({\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}.{\text{9 }}{{\text{H}}_{\text{2}}}{\text{O}}\)
  • B
    \({\text{N}}{{\text{H}}_{\text{4}}}{\text{Cl}}\)
  • C
    \({\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}.{\text{5 }}{{\text{H}}_{\text{2}}}{\text{O}}\)
  • D
    \({\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}.{\text{1}}0{\text{ }}{{\text{H}}_{\text{2}}}{\text{O}}\)
    Correct
3
The common salt or table salt is
  • A
    Ammonium chloride
  • B
    Potassium chloride
  • C
    Sodium chloride
    Correct
  • D
    Calcium chloride
4
Caustic soda is
  • A
    Sodium hydroxide
    Correct
  • B
    Calcium hydroxide
  • C
    Potassium hydroxide
  • D
    Ammonium hydroxide
5
Sodium hydrogencarbonate is known as
  • A
    Caustic soda
  • B
    table salt
  • C
    baking soda
    Correct
  • D
    Washing soda
6
Potassium ions are the most abundant cations. They:
  • A
    inactivate many enzymes which help in penetration of cell membrane
  • B
    participate in the oxidation of glucose to produce ATP
    Correct
  • C
    found primarily on the outside of cells
  • D
    are the most abundant anions within cell fluids
7
To acquire noble gas configuration, alkaline earth metals lose
  • A
    electrons
  • B
    4 electrons
  • C
    2 electrons
    Correct
  • D
    3 electrons
8
Alkaline earth metals show large size of the atoms. Therefore, they have
  • A
    low ionization enthalpies
    Correct
  • B
    low hydration enthalpies
  • C
    low electopositivity
  • D
    low nuclear charge
9
Choose the correct order of increase in electopositivity of alkaline earth metals in the options given below
  • A
    \({\text{B}}{{\text{e}}^{{\text{2}} + }} > {\text{ M}}{{\text{g}}^{{\text{2}} + }} > {\text{ C}}{{\text{a}}^{{\text{2}} + }} > {\text{ S}}{{\text{r}}^{{\text{2}} + }} > {\text{ B}}{{\text{a}}^{{\text{2}} + }}\)
    Correct
  • B
    \({\text{C}}{{\text{a}}^{{\text{2}} + }} > {\text{ S}}{{\text{r}}^{{\text{2}} + }} > {\text{ B}}{{\text{a}}^{{\text{2}} + }} < {\text{ B}}{{\text{e}}^{{\text{2}} + }} < {\text{ M}}{{\text{g}}^{{\text{2}} + }}\)
  • C
    \({\text{S}}{{\text{r}}^{{\text{2}} + }} > {\text{ B}}{{\text{a}}^{{\text{2}} + }} < {\text{ B}}{{\text{e}}^{{\text{2}} + }} < {\text{ M}}{{\text{g}}^{{\text{2}} + }} < {\text{ S}}{{\text{r}}^{{\text{2}} + }}\)
  • D
    \({\text{M}}{{\text{g}}^{{\text{2}} + }} > {\text{ C}}{{\text{a}}^{{\text{2}} + }} > {\text{ S}}{{\text{r}}^{{\text{2}} + }} > {\text{ B}}{{\text{a}}^{{\text{2}} + }} < {\text{ B}}{{\text{e}}^{{\text{2}} + }}\)
10
Choose the correct order of increase in ionic size of alkaline earth metals in the options given below
  • A
    \({\text{M}}{{\text{g}}^{{\text{2}} + }} > {\text{ C}}{{\text{a}}^{{\text{2}} + }} > {\text{ S}}{{\text{r}}^{{\text{2}} + }} > {\text{ B}}{{\text{a}}^{{\text{2}} + }} < {\text{ B}}{{\text{e}}^{{\text{2}} + }}\)
  • B
    \({\text{B}}{{\text{e}}^{{\text{2}} + }} > {\text{ M}}{{\text{g}}^{{\text{2}} + }} > {\text{ C}}{{\text{a}}^{{\text{2}} + }} > {\text{ S}}{{\text{r}}^{{\text{2}} + }} > {\text{ B}}{{\text{a}}^{{\text{2}} + }}\)
    Correct
  • C
    \({\text{S}}{{\text{r}}^{{\text{2}} + }} > {\text{ B}}{{\text{a}}^{{\text{2}} + }} < {\text{ B}}{{\text{e}}^{{\text{2}} + }} < {\text{ M}}{{\text{g}}^{{\text{2}} + }} < {\text{ S}}{{\text{r}}^{{\text{2}} + }}\)
  • D
    \({\text{C}}{{\text{a}}^{{\text{2}} + }} > {\text{ S}}{{\text{r}}^{{\text{2}} + }} > {\text{ B}}{{\text{a}}^{{\text{2}} + }} < {\text{ B}}{{\text{e}}^{{\text{2}} + }} < {\text{ M}}{{\text{g}}^{{\text{2}} + }}\)
11
Beryllium carbonate is unstable and can be kept only in the atmosphere of
  • A
    \({\text{S}}{{\text{O}}_{\text{2}}}\)
  • B
    \({\text{N}}{{\text{O}}_{\text{2}}}\)
  • C
    \({{\text{O}}_{\text{2}}}\)
  • D
    \({\text{C}}{{\text{O}}_{\text{2}}}\)
    Correct
12
Radium salts are used in
  • A
    in the treatment of tuberculosis
  • B
    in the treatment of cancer
    Correct
  • C
    in the treatment of metal sheets
  • D
    in the treatment of infectious diseases
13
Choose the correct order of decrease in hydration enthalpies of alkaline earth metals in the options given below
  • A
    \({\text{C}}{{\text{a}}^{{\text{2}} + }} < {\text{ S}}{{\text{r}}^{{\text{2}} + }} < {\text{ B}}{{\text{a}}^{{\text{2}} + }} < {\text{ B}}{{\text{e}}^{{\text{2}} + }} < {\text{ M}}{{\text{g}}^{{\text{2}} + }}\)
  • B
    \({\text{S}}{{\text{r}}^{{\text{2}} + }} < {\text{ B}}{{\text{a}}^{{\text{2}} + }} < {\text{ B}}{{\text{e}}^{{\text{2}} + }} < {\text{ M}}{{\text{g}}^{{\text{2}} + }} < {\text{ S}}{{\text{r}}^{{\text{2}} + }}\)
  • C
    \({\text{B}}{{\text{e}}^{{\text{2}} + }} < {\text{ M}}{{\text{g}}^{{\text{2}} + }} < {\text{ C}}{{\text{a}}^{{\text{2}} + }} < {\text{ S}}{{\text{r}}^{{\text{2}} + }} < {\text{ B}}{{\text{a}}^{{\text{2}} + }}\)
    Correct
  • D
    \({\text{M}}{{\text{g}}^{{\text{2}} + }} < {\text{ C}}{{\text{a}}^{{\text{2}} + }} < {\text{ S}}{{\text{r}}^{{\text{2}} + }} < {\text{ B}}{{\text{a}}^{{\text{2}} + }} < {\text{ B}}{{\text{e}}^{{\text{2}} + }}\)
14
Why does the solubility of alkaline earth metal carbonates and sulphates in water decrease down the group?
  • A
    hydration enthalpy decreases down the group
    Correct
  • B
    lattice enthalpy decreases down the group
  • C
    size of anions being much shorterer compared to cations
  • D
    coordination numbesr more than four
15
Calcium oxide is prepared on a commercial scale by using
  • A
    limestone and rotary kiln
    Correct
  • B
    limestone and Daniell cell
  • C
    limestone and Solvay process
  • D
    limestone and Castner-Kellner process