315884
The alkali metal with the highest melting point is
1 \(\mathrm{Li}\)
2 \(\mathrm{Na}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Rb}\)
Explanation:
Li has highest melting point among alkali metals. All alkali metals have low M.P. The M.P. decrease down the group. The low M.P. are attributed to their larger atomic size due to which the binding energies of their atoms in the crystal lattice are low.
CHXI10:THE S-BLOCK ELEMENTS
315885
The formula of nitre is
1 \(\mathrm{KNO}_{3}\)
2 \(\mathrm{NaNO}_{2}\)
3 \(\mathrm{NaCl}\)
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
Explanation:
Nitrate or Indian Salt peter is \(\mathrm{KNO}_{3}\).
CHXI10:THE S-BLOCK ELEMENTS
315886
Which of the following alkali metal is expected to melt if the room temperature rises to \(30^{\circ} \mathrm{C}\) ?
1 \(\mathrm{Na}\)
2 \(\mathrm{K}\)
3 \(\mathrm{Rb}\)
4 \(\mathrm{Cs}\)
Explanation:
Conceptual Questions
NCERT Exempler
CHXI10:THE S-BLOCK ELEMENTS
315887
The alkali metal which is a liquid at room temperature is
315884
The alkali metal with the highest melting point is
1 \(\mathrm{Li}\)
2 \(\mathrm{Na}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Rb}\)
Explanation:
Li has highest melting point among alkali metals. All alkali metals have low M.P. The M.P. decrease down the group. The low M.P. are attributed to their larger atomic size due to which the binding energies of their atoms in the crystal lattice are low.
CHXI10:THE S-BLOCK ELEMENTS
315885
The formula of nitre is
1 \(\mathrm{KNO}_{3}\)
2 \(\mathrm{NaNO}_{2}\)
3 \(\mathrm{NaCl}\)
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
Explanation:
Nitrate or Indian Salt peter is \(\mathrm{KNO}_{3}\).
CHXI10:THE S-BLOCK ELEMENTS
315886
Which of the following alkali metal is expected to melt if the room temperature rises to \(30^{\circ} \mathrm{C}\) ?
1 \(\mathrm{Na}\)
2 \(\mathrm{K}\)
3 \(\mathrm{Rb}\)
4 \(\mathrm{Cs}\)
Explanation:
Conceptual Questions
NCERT Exempler
CHXI10:THE S-BLOCK ELEMENTS
315887
The alkali metal which is a liquid at room temperature is
315884
The alkali metal with the highest melting point is
1 \(\mathrm{Li}\)
2 \(\mathrm{Na}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Rb}\)
Explanation:
Li has highest melting point among alkali metals. All alkali metals have low M.P. The M.P. decrease down the group. The low M.P. are attributed to their larger atomic size due to which the binding energies of their atoms in the crystal lattice are low.
CHXI10:THE S-BLOCK ELEMENTS
315885
The formula of nitre is
1 \(\mathrm{KNO}_{3}\)
2 \(\mathrm{NaNO}_{2}\)
3 \(\mathrm{NaCl}\)
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
Explanation:
Nitrate or Indian Salt peter is \(\mathrm{KNO}_{3}\).
CHXI10:THE S-BLOCK ELEMENTS
315886
Which of the following alkali metal is expected to melt if the room temperature rises to \(30^{\circ} \mathrm{C}\) ?
1 \(\mathrm{Na}\)
2 \(\mathrm{K}\)
3 \(\mathrm{Rb}\)
4 \(\mathrm{Cs}\)
Explanation:
Conceptual Questions
NCERT Exempler
CHXI10:THE S-BLOCK ELEMENTS
315887
The alkali metal which is a liquid at room temperature is
315884
The alkali metal with the highest melting point is
1 \(\mathrm{Li}\)
2 \(\mathrm{Na}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Rb}\)
Explanation:
Li has highest melting point among alkali metals. All alkali metals have low M.P. The M.P. decrease down the group. The low M.P. are attributed to their larger atomic size due to which the binding energies of their atoms in the crystal lattice are low.
CHXI10:THE S-BLOCK ELEMENTS
315885
The formula of nitre is
1 \(\mathrm{KNO}_{3}\)
2 \(\mathrm{NaNO}_{2}\)
3 \(\mathrm{NaCl}\)
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
Explanation:
Nitrate or Indian Salt peter is \(\mathrm{KNO}_{3}\).
CHXI10:THE S-BLOCK ELEMENTS
315886
Which of the following alkali metal is expected to melt if the room temperature rises to \(30^{\circ} \mathrm{C}\) ?
1 \(\mathrm{Na}\)
2 \(\mathrm{K}\)
3 \(\mathrm{Rb}\)
4 \(\mathrm{Cs}\)
Explanation:
Conceptual Questions
NCERT Exempler
CHXI10:THE S-BLOCK ELEMENTS
315887
The alkali metal which is a liquid at room temperature is
