316717
Assertion : Anhydrous \(\mathrm{CaCl}_{2}\) cannot be used for drying \(\mathrm{NH}_{3}\) gas. Reason : \(\mathrm{NH}_{3}\) gas is basic in nature.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
\(\mathrm{CaCl}_{2}\) forms addition compound \(\left(\mathrm{CaCl}_{2} \cdot 8 \mathrm{NH}_{3}\right)\) with \(\mathrm{NH}_{3} \cdot \mathrm{NH}_{3}\) is a Lewis base, but it is not the correct explantion for assertion. So option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316718
By which of the following processes, pure nitrogen gas is prepared?
Very pure nitrogen can be obtained by the thermal decomposition of barium azide as. \(\mathrm{Ba}\left(\mathrm{N}_{3}\right)_{2} \longrightarrow \mathrm{Ba}+3 \mathrm{~N}_{2}\) In other reactions, impurities are also obtained. Hence, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316719
Very pure \(\mathrm{N}_{2}\) can be obtained by
1 thermal decomposition of ammonium dichromate
2 treating aqueous solution of \(\mathrm{NH}_{4} \mathrm{Cl}\) and \(\mathrm{NaNO}_{2}\)
3 liquefaction and fractional distillation of liquid air
4 thermal decomposition of sodium azide.
Explanation:
Pure nitrogen is obtained by heating sodium or barium azide in vacuum. \({\rm{2Na}}{{\rm{N}}_{\rm{3}}}\mathop \to \limits^\Delta {\rm{3}}\;{{\rm{N}}_{\rm{2}}}{\rm{ + 2Na}}\)
CHXI11:THE P-BLOCK ELEMENTS
316720
The compound that does not produce nitrogen gas by the thermal decomposition is
a. \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \stackrel{\Delta}{\longrightarrow} \mathrm{Cr}_{2} \mathrm{O}_{3}+\mathrm{N}_{2}+4 \mathrm{H}_{2} \mathrm{O}\) b. \(\mathrm{NH}_{4} \mathrm{NO}_{2} \stackrel{\Delta}{\longrightarrow} \mathrm{N}_{2}+2 \mathrm{H}_{2} \mathrm{O}\) c. \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{NH}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4}\) d. \({\text{Ba}}{\left( {{{\text{N}}_{\text{3}}}} \right)_{\text{2}}}\xrightarrow{{\text{\Delta }}}{\text{Ba + 3}}{{\text{N}}_{\text{2}}}\) In reaction (c) \({\rm{N}}{{\rm{H}}_{\rm{3}}}\) is evolved where as in reaction \(\mathrm{a}, \mathrm{b}\) and \(\mathrm{d}, N_{2}\) is evolved
316717
Assertion : Anhydrous \(\mathrm{CaCl}_{2}\) cannot be used for drying \(\mathrm{NH}_{3}\) gas. Reason : \(\mathrm{NH}_{3}\) gas is basic in nature.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
\(\mathrm{CaCl}_{2}\) forms addition compound \(\left(\mathrm{CaCl}_{2} \cdot 8 \mathrm{NH}_{3}\right)\) with \(\mathrm{NH}_{3} \cdot \mathrm{NH}_{3}\) is a Lewis base, but it is not the correct explantion for assertion. So option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316718
By which of the following processes, pure nitrogen gas is prepared?
Very pure nitrogen can be obtained by the thermal decomposition of barium azide as. \(\mathrm{Ba}\left(\mathrm{N}_{3}\right)_{2} \longrightarrow \mathrm{Ba}+3 \mathrm{~N}_{2}\) In other reactions, impurities are also obtained. Hence, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316719
Very pure \(\mathrm{N}_{2}\) can be obtained by
1 thermal decomposition of ammonium dichromate
2 treating aqueous solution of \(\mathrm{NH}_{4} \mathrm{Cl}\) and \(\mathrm{NaNO}_{2}\)
3 liquefaction and fractional distillation of liquid air
4 thermal decomposition of sodium azide.
Explanation:
Pure nitrogen is obtained by heating sodium or barium azide in vacuum. \({\rm{2Na}}{{\rm{N}}_{\rm{3}}}\mathop \to \limits^\Delta {\rm{3}}\;{{\rm{N}}_{\rm{2}}}{\rm{ + 2Na}}\)
CHXI11:THE P-BLOCK ELEMENTS
316720
The compound that does not produce nitrogen gas by the thermal decomposition is
a. \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \stackrel{\Delta}{\longrightarrow} \mathrm{Cr}_{2} \mathrm{O}_{3}+\mathrm{N}_{2}+4 \mathrm{H}_{2} \mathrm{O}\) b. \(\mathrm{NH}_{4} \mathrm{NO}_{2} \stackrel{\Delta}{\longrightarrow} \mathrm{N}_{2}+2 \mathrm{H}_{2} \mathrm{O}\) c. \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{NH}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4}\) d. \({\text{Ba}}{\left( {{{\text{N}}_{\text{3}}}} \right)_{\text{2}}}\xrightarrow{{\text{\Delta }}}{\text{Ba + 3}}{{\text{N}}_{\text{2}}}\) In reaction (c) \({\rm{N}}{{\rm{H}}_{\rm{3}}}\) is evolved where as in reaction \(\mathrm{a}, \mathrm{b}\) and \(\mathrm{d}, N_{2}\) is evolved
316717
Assertion : Anhydrous \(\mathrm{CaCl}_{2}\) cannot be used for drying \(\mathrm{NH}_{3}\) gas. Reason : \(\mathrm{NH}_{3}\) gas is basic in nature.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
\(\mathrm{CaCl}_{2}\) forms addition compound \(\left(\mathrm{CaCl}_{2} \cdot 8 \mathrm{NH}_{3}\right)\) with \(\mathrm{NH}_{3} \cdot \mathrm{NH}_{3}\) is a Lewis base, but it is not the correct explantion for assertion. So option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316718
By which of the following processes, pure nitrogen gas is prepared?
Very pure nitrogen can be obtained by the thermal decomposition of barium azide as. \(\mathrm{Ba}\left(\mathrm{N}_{3}\right)_{2} \longrightarrow \mathrm{Ba}+3 \mathrm{~N}_{2}\) In other reactions, impurities are also obtained. Hence, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316719
Very pure \(\mathrm{N}_{2}\) can be obtained by
1 thermal decomposition of ammonium dichromate
2 treating aqueous solution of \(\mathrm{NH}_{4} \mathrm{Cl}\) and \(\mathrm{NaNO}_{2}\)
3 liquefaction and fractional distillation of liquid air
4 thermal decomposition of sodium azide.
Explanation:
Pure nitrogen is obtained by heating sodium or barium azide in vacuum. \({\rm{2Na}}{{\rm{N}}_{\rm{3}}}\mathop \to \limits^\Delta {\rm{3}}\;{{\rm{N}}_{\rm{2}}}{\rm{ + 2Na}}\)
CHXI11:THE P-BLOCK ELEMENTS
316720
The compound that does not produce nitrogen gas by the thermal decomposition is
a. \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \stackrel{\Delta}{\longrightarrow} \mathrm{Cr}_{2} \mathrm{O}_{3}+\mathrm{N}_{2}+4 \mathrm{H}_{2} \mathrm{O}\) b. \(\mathrm{NH}_{4} \mathrm{NO}_{2} \stackrel{\Delta}{\longrightarrow} \mathrm{N}_{2}+2 \mathrm{H}_{2} \mathrm{O}\) c. \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{NH}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4}\) d. \({\text{Ba}}{\left( {{{\text{N}}_{\text{3}}}} \right)_{\text{2}}}\xrightarrow{{\text{\Delta }}}{\text{Ba + 3}}{{\text{N}}_{\text{2}}}\) In reaction (c) \({\rm{N}}{{\rm{H}}_{\rm{3}}}\) is evolved where as in reaction \(\mathrm{a}, \mathrm{b}\) and \(\mathrm{d}, N_{2}\) is evolved
316717
Assertion : Anhydrous \(\mathrm{CaCl}_{2}\) cannot be used for drying \(\mathrm{NH}_{3}\) gas. Reason : \(\mathrm{NH}_{3}\) gas is basic in nature.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
\(\mathrm{CaCl}_{2}\) forms addition compound \(\left(\mathrm{CaCl}_{2} \cdot 8 \mathrm{NH}_{3}\right)\) with \(\mathrm{NH}_{3} \cdot \mathrm{NH}_{3}\) is a Lewis base, but it is not the correct explantion for assertion. So option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316718
By which of the following processes, pure nitrogen gas is prepared?
Very pure nitrogen can be obtained by the thermal decomposition of barium azide as. \(\mathrm{Ba}\left(\mathrm{N}_{3}\right)_{2} \longrightarrow \mathrm{Ba}+3 \mathrm{~N}_{2}\) In other reactions, impurities are also obtained. Hence, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316719
Very pure \(\mathrm{N}_{2}\) can be obtained by
1 thermal decomposition of ammonium dichromate
2 treating aqueous solution of \(\mathrm{NH}_{4} \mathrm{Cl}\) and \(\mathrm{NaNO}_{2}\)
3 liquefaction and fractional distillation of liquid air
4 thermal decomposition of sodium azide.
Explanation:
Pure nitrogen is obtained by heating sodium or barium azide in vacuum. \({\rm{2Na}}{{\rm{N}}_{\rm{3}}}\mathop \to \limits^\Delta {\rm{3}}\;{{\rm{N}}_{\rm{2}}}{\rm{ + 2Na}}\)
CHXI11:THE P-BLOCK ELEMENTS
316720
The compound that does not produce nitrogen gas by the thermal decomposition is
a. \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \stackrel{\Delta}{\longrightarrow} \mathrm{Cr}_{2} \mathrm{O}_{3}+\mathrm{N}_{2}+4 \mathrm{H}_{2} \mathrm{O}\) b. \(\mathrm{NH}_{4} \mathrm{NO}_{2} \stackrel{\Delta}{\longrightarrow} \mathrm{N}_{2}+2 \mathrm{H}_{2} \mathrm{O}\) c. \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{NH}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4}\) d. \({\text{Ba}}{\left( {{{\text{N}}_{\text{3}}}} \right)_{\text{2}}}\xrightarrow{{\text{\Delta }}}{\text{Ba + 3}}{{\text{N}}_{\text{2}}}\) In reaction (c) \({\rm{N}}{{\rm{H}}_{\rm{3}}}\) is evolved where as in reaction \(\mathrm{a}, \mathrm{b}\) and \(\mathrm{d}, N_{2}\) is evolved
316717
Assertion : Anhydrous \(\mathrm{CaCl}_{2}\) cannot be used for drying \(\mathrm{NH}_{3}\) gas. Reason : \(\mathrm{NH}_{3}\) gas is basic in nature.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
\(\mathrm{CaCl}_{2}\) forms addition compound \(\left(\mathrm{CaCl}_{2} \cdot 8 \mathrm{NH}_{3}\right)\) with \(\mathrm{NH}_{3} \cdot \mathrm{NH}_{3}\) is a Lewis base, but it is not the correct explantion for assertion. So option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316718
By which of the following processes, pure nitrogen gas is prepared?
Very pure nitrogen can be obtained by the thermal decomposition of barium azide as. \(\mathrm{Ba}\left(\mathrm{N}_{3}\right)_{2} \longrightarrow \mathrm{Ba}+3 \mathrm{~N}_{2}\) In other reactions, impurities are also obtained. Hence, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316719
Very pure \(\mathrm{N}_{2}\) can be obtained by
1 thermal decomposition of ammonium dichromate
2 treating aqueous solution of \(\mathrm{NH}_{4} \mathrm{Cl}\) and \(\mathrm{NaNO}_{2}\)
3 liquefaction and fractional distillation of liquid air
4 thermal decomposition of sodium azide.
Explanation:
Pure nitrogen is obtained by heating sodium or barium azide in vacuum. \({\rm{2Na}}{{\rm{N}}_{\rm{3}}}\mathop \to \limits^\Delta {\rm{3}}\;{{\rm{N}}_{\rm{2}}}{\rm{ + 2Na}}\)
CHXI11:THE P-BLOCK ELEMENTS
316720
The compound that does not produce nitrogen gas by the thermal decomposition is
a. \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \stackrel{\Delta}{\longrightarrow} \mathrm{Cr}_{2} \mathrm{O}_{3}+\mathrm{N}_{2}+4 \mathrm{H}_{2} \mathrm{O}\) b. \(\mathrm{NH}_{4} \mathrm{NO}_{2} \stackrel{\Delta}{\longrightarrow} \mathrm{N}_{2}+2 \mathrm{H}_{2} \mathrm{O}\) c. \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{NH}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4}\) d. \({\text{Ba}}{\left( {{{\text{N}}_{\text{3}}}} \right)_{\text{2}}}\xrightarrow{{\text{\Delta }}}{\text{Ba + 3}}{{\text{N}}_{\text{2}}}\) In reaction (c) \({\rm{N}}{{\rm{H}}_{\rm{3}}}\) is evolved where as in reaction \(\mathrm{a}, \mathrm{b}\) and \(\mathrm{d}, N_{2}\) is evolved
