315976
In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?
1 \(\mathrm{NaOH}\)
2 \(\mathrm{NaCl}\)
3 \(\mathrm{Na}\) metal
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
Explanation:
Sodium hydroxide is generally prepared commerically by electrolysis of sodium chloride in Castner Kellner cell. At cathode : \(\stackrel{+}{\mathrm{Na}}+\mathrm{e}^{-} \stackrel{\mathrm{Hg}}{\longrightarrow} \mathrm{Na}-\) amalgam At Anode: \(\mathrm{Cl}^{-} \rightarrow \dfrac{1}{2} \mathrm{Cl}_{2}+\mathrm{e}^{-}\) The \(\mathrm{Na}\) - amalgam is treated with water to give sodium hydroxide and hydrogen gas \({\rm{2Na}}\,{\rm{(ama}}\,\,{\rm{lg}}\,\,{\rm{am) + }}{{\rm{H}}_{\rm{2}}}{\rm{O}} \to {\rm{2NaOH + }}{{\rm{H}}_{\rm{2}}}{\rm{ + 2Hg}}\)
JEE - 2022
CHXI10:THE S-BLOCK ELEMENTS
315977
Find the wrong statement.
1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is used in glass industry
2 \(\mathrm{KHCO}_{3}\) is acidic salt
3 \(\mathrm{K}_{2} \mathrm{CO}_{3}\) can be prepared by Solvay process
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is used for metal refining
Explanation:
\(\mathrm{KHCO}_{3}\) is much more soluble than \(\mathrm{NaHCO}_{3}\). So, in Solvay process, \(\mathrm{KHCO}_{3}\) cannot be precipitated. Therefore, \(\mathrm{K}_{2} \mathrm{CO}_{3}\) cannot be prepared by Solvay process.
CHXI10:THE S-BLOCK ELEMENTS
315978
Which of the following salts would liberate \(\mathrm{SO}_{2}\) with hot and dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and also decolourises \(\mathrm{Br}_{2}\) water?
1 \(\mathrm{Na}_{2} \mathrm{SO}_{3}\)
2 \(\mathrm{NaHSO}_{4}\)
3 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
4 \(\mathrm{Na}_{2} \mathrm{~S}\)
Explanation:
\(\mathrm{Na}_{2} \mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{Na}_{2} \mathrm{SO}_{4}+\mathrm{H}_{2} \mathrm{O}+\mathrm{SO}_{2} \uparrow ;\) Also \(\mathrm{SO}_{3}^{2-}\) is reductant and oxidises \(\mathrm{Br}_{2}\) water.
CHXI10:THE S-BLOCK ELEMENTS
315979
\(\mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{Fe}_{2} \mathrm{O}_{3} \rightarrow \mathrm{A}+\mathrm{CO}_{2} ; \mathrm{A}\) is:
315976
In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?
1 \(\mathrm{NaOH}\)
2 \(\mathrm{NaCl}\)
3 \(\mathrm{Na}\) metal
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
Explanation:
Sodium hydroxide is generally prepared commerically by electrolysis of sodium chloride in Castner Kellner cell. At cathode : \(\stackrel{+}{\mathrm{Na}}+\mathrm{e}^{-} \stackrel{\mathrm{Hg}}{\longrightarrow} \mathrm{Na}-\) amalgam At Anode: \(\mathrm{Cl}^{-} \rightarrow \dfrac{1}{2} \mathrm{Cl}_{2}+\mathrm{e}^{-}\) The \(\mathrm{Na}\) - amalgam is treated with water to give sodium hydroxide and hydrogen gas \({\rm{2Na}}\,{\rm{(ama}}\,\,{\rm{lg}}\,\,{\rm{am) + }}{{\rm{H}}_{\rm{2}}}{\rm{O}} \to {\rm{2NaOH + }}{{\rm{H}}_{\rm{2}}}{\rm{ + 2Hg}}\)
JEE - 2022
CHXI10:THE S-BLOCK ELEMENTS
315977
Find the wrong statement.
1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is used in glass industry
2 \(\mathrm{KHCO}_{3}\) is acidic salt
3 \(\mathrm{K}_{2} \mathrm{CO}_{3}\) can be prepared by Solvay process
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is used for metal refining
Explanation:
\(\mathrm{KHCO}_{3}\) is much more soluble than \(\mathrm{NaHCO}_{3}\). So, in Solvay process, \(\mathrm{KHCO}_{3}\) cannot be precipitated. Therefore, \(\mathrm{K}_{2} \mathrm{CO}_{3}\) cannot be prepared by Solvay process.
CHXI10:THE S-BLOCK ELEMENTS
315978
Which of the following salts would liberate \(\mathrm{SO}_{2}\) with hot and dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and also decolourises \(\mathrm{Br}_{2}\) water?
1 \(\mathrm{Na}_{2} \mathrm{SO}_{3}\)
2 \(\mathrm{NaHSO}_{4}\)
3 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
4 \(\mathrm{Na}_{2} \mathrm{~S}\)
Explanation:
\(\mathrm{Na}_{2} \mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{Na}_{2} \mathrm{SO}_{4}+\mathrm{H}_{2} \mathrm{O}+\mathrm{SO}_{2} \uparrow ;\) Also \(\mathrm{SO}_{3}^{2-}\) is reductant and oxidises \(\mathrm{Br}_{2}\) water.
CHXI10:THE S-BLOCK ELEMENTS
315979
\(\mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{Fe}_{2} \mathrm{O}_{3} \rightarrow \mathrm{A}+\mathrm{CO}_{2} ; \mathrm{A}\) is:
315976
In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?
1 \(\mathrm{NaOH}\)
2 \(\mathrm{NaCl}\)
3 \(\mathrm{Na}\) metal
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
Explanation:
Sodium hydroxide is generally prepared commerically by electrolysis of sodium chloride in Castner Kellner cell. At cathode : \(\stackrel{+}{\mathrm{Na}}+\mathrm{e}^{-} \stackrel{\mathrm{Hg}}{\longrightarrow} \mathrm{Na}-\) amalgam At Anode: \(\mathrm{Cl}^{-} \rightarrow \dfrac{1}{2} \mathrm{Cl}_{2}+\mathrm{e}^{-}\) The \(\mathrm{Na}\) - amalgam is treated with water to give sodium hydroxide and hydrogen gas \({\rm{2Na}}\,{\rm{(ama}}\,\,{\rm{lg}}\,\,{\rm{am) + }}{{\rm{H}}_{\rm{2}}}{\rm{O}} \to {\rm{2NaOH + }}{{\rm{H}}_{\rm{2}}}{\rm{ + 2Hg}}\)
JEE - 2022
CHXI10:THE S-BLOCK ELEMENTS
315977
Find the wrong statement.
1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is used in glass industry
2 \(\mathrm{KHCO}_{3}\) is acidic salt
3 \(\mathrm{K}_{2} \mathrm{CO}_{3}\) can be prepared by Solvay process
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is used for metal refining
Explanation:
\(\mathrm{KHCO}_{3}\) is much more soluble than \(\mathrm{NaHCO}_{3}\). So, in Solvay process, \(\mathrm{KHCO}_{3}\) cannot be precipitated. Therefore, \(\mathrm{K}_{2} \mathrm{CO}_{3}\) cannot be prepared by Solvay process.
CHXI10:THE S-BLOCK ELEMENTS
315978
Which of the following salts would liberate \(\mathrm{SO}_{2}\) with hot and dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and also decolourises \(\mathrm{Br}_{2}\) water?
1 \(\mathrm{Na}_{2} \mathrm{SO}_{3}\)
2 \(\mathrm{NaHSO}_{4}\)
3 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
4 \(\mathrm{Na}_{2} \mathrm{~S}\)
Explanation:
\(\mathrm{Na}_{2} \mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{Na}_{2} \mathrm{SO}_{4}+\mathrm{H}_{2} \mathrm{O}+\mathrm{SO}_{2} \uparrow ;\) Also \(\mathrm{SO}_{3}^{2-}\) is reductant and oxidises \(\mathrm{Br}_{2}\) water.
CHXI10:THE S-BLOCK ELEMENTS
315979
\(\mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{Fe}_{2} \mathrm{O}_{3} \rightarrow \mathrm{A}+\mathrm{CO}_{2} ; \mathrm{A}\) is:
315976
In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?
1 \(\mathrm{NaOH}\)
2 \(\mathrm{NaCl}\)
3 \(\mathrm{Na}\) metal
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
Explanation:
Sodium hydroxide is generally prepared commerically by electrolysis of sodium chloride in Castner Kellner cell. At cathode : \(\stackrel{+}{\mathrm{Na}}+\mathrm{e}^{-} \stackrel{\mathrm{Hg}}{\longrightarrow} \mathrm{Na}-\) amalgam At Anode: \(\mathrm{Cl}^{-} \rightarrow \dfrac{1}{2} \mathrm{Cl}_{2}+\mathrm{e}^{-}\) The \(\mathrm{Na}\) - amalgam is treated with water to give sodium hydroxide and hydrogen gas \({\rm{2Na}}\,{\rm{(ama}}\,\,{\rm{lg}}\,\,{\rm{am) + }}{{\rm{H}}_{\rm{2}}}{\rm{O}} \to {\rm{2NaOH + }}{{\rm{H}}_{\rm{2}}}{\rm{ + 2Hg}}\)
JEE - 2022
CHXI10:THE S-BLOCK ELEMENTS
315977
Find the wrong statement.
1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is used in glass industry
2 \(\mathrm{KHCO}_{3}\) is acidic salt
3 \(\mathrm{K}_{2} \mathrm{CO}_{3}\) can be prepared by Solvay process
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is used for metal refining
Explanation:
\(\mathrm{KHCO}_{3}\) is much more soluble than \(\mathrm{NaHCO}_{3}\). So, in Solvay process, \(\mathrm{KHCO}_{3}\) cannot be precipitated. Therefore, \(\mathrm{K}_{2} \mathrm{CO}_{3}\) cannot be prepared by Solvay process.
CHXI10:THE S-BLOCK ELEMENTS
315978
Which of the following salts would liberate \(\mathrm{SO}_{2}\) with hot and dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and also decolourises \(\mathrm{Br}_{2}\) water?
1 \(\mathrm{Na}_{2} \mathrm{SO}_{3}\)
2 \(\mathrm{NaHSO}_{4}\)
3 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
4 \(\mathrm{Na}_{2} \mathrm{~S}\)
Explanation:
\(\mathrm{Na}_{2} \mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{Na}_{2} \mathrm{SO}_{4}+\mathrm{H}_{2} \mathrm{O}+\mathrm{SO}_{2} \uparrow ;\) Also \(\mathrm{SO}_{3}^{2-}\) is reductant and oxidises \(\mathrm{Br}_{2}\) water.
CHXI10:THE S-BLOCK ELEMENTS
315979
\(\mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{Fe}_{2} \mathrm{O}_{3} \rightarrow \mathrm{A}+\mathrm{CO}_{2} ; \mathrm{A}\) is:
315976
In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?
1 \(\mathrm{NaOH}\)
2 \(\mathrm{NaCl}\)
3 \(\mathrm{Na}\) metal
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
Explanation:
Sodium hydroxide is generally prepared commerically by electrolysis of sodium chloride in Castner Kellner cell. At cathode : \(\stackrel{+}{\mathrm{Na}}+\mathrm{e}^{-} \stackrel{\mathrm{Hg}}{\longrightarrow} \mathrm{Na}-\) amalgam At Anode: \(\mathrm{Cl}^{-} \rightarrow \dfrac{1}{2} \mathrm{Cl}_{2}+\mathrm{e}^{-}\) The \(\mathrm{Na}\) - amalgam is treated with water to give sodium hydroxide and hydrogen gas \({\rm{2Na}}\,{\rm{(ama}}\,\,{\rm{lg}}\,\,{\rm{am) + }}{{\rm{H}}_{\rm{2}}}{\rm{O}} \to {\rm{2NaOH + }}{{\rm{H}}_{\rm{2}}}{\rm{ + 2Hg}}\)
JEE - 2022
CHXI10:THE S-BLOCK ELEMENTS
315977
Find the wrong statement.
1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is used in glass industry
2 \(\mathrm{KHCO}_{3}\) is acidic salt
3 \(\mathrm{K}_{2} \mathrm{CO}_{3}\) can be prepared by Solvay process
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) is used for metal refining
Explanation:
\(\mathrm{KHCO}_{3}\) is much more soluble than \(\mathrm{NaHCO}_{3}\). So, in Solvay process, \(\mathrm{KHCO}_{3}\) cannot be precipitated. Therefore, \(\mathrm{K}_{2} \mathrm{CO}_{3}\) cannot be prepared by Solvay process.
CHXI10:THE S-BLOCK ELEMENTS
315978
Which of the following salts would liberate \(\mathrm{SO}_{2}\) with hot and dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and also decolourises \(\mathrm{Br}_{2}\) water?
1 \(\mathrm{Na}_{2} \mathrm{SO}_{3}\)
2 \(\mathrm{NaHSO}_{4}\)
3 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
4 \(\mathrm{Na}_{2} \mathrm{~S}\)
Explanation:
\(\mathrm{Na}_{2} \mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{Na}_{2} \mathrm{SO}_{4}+\mathrm{H}_{2} \mathrm{O}+\mathrm{SO}_{2} \uparrow ;\) Also \(\mathrm{SO}_{3}^{2-}\) is reductant and oxidises \(\mathrm{Br}_{2}\) water.
CHXI10:THE S-BLOCK ELEMENTS
315979
\(\mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{Fe}_{2} \mathrm{O}_{3} \rightarrow \mathrm{A}+\mathrm{CO}_{2} ; \mathrm{A}\) is:
