Boron and its Compounds
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CHXI11:THE P-BLOCK ELEMENTS

316061 Which of the following does not give borax bead test?

1 \(\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}\)
2 \(\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}\)
3 \(\mathrm{NiSO}_{4}\)
4 \(\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Co}\)
CHXI11:THE P-BLOCK ELEMENTS

316062 Addition of mineral acid to an aqueous solution of borax, the following compound is formed

1 boron hydride
2 pyroboric acid
3 metaboric acid
4 orthoboric acid.
KCET - 2017
CHXI11:THE P-BLOCK ELEMENTS

316063 Assertion :
Coloured cations can be identified by borax bead test.
Reason :
Transparent bead \(\left(\mathrm{NaBO}_{2}+\mathrm{B}_{2} \mathrm{O}_{3}\right)\) forms coloured bead with coloured cation.

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 Both Assertion and Reason is Incorrect
AIIMS - 2009
CHXI11:THE P-BLOCK ELEMENTS

316064 In the reaction
\({\text{N}}{{\text{a}}_2}\;{{\text{B}}_4}{{\text{O}}_7} \cdot 10{{\text{H}}_2}{\text{O }}\xrightarrow{{60^\circ {\text{C}}}}{\text{A}}\xrightarrow{{100^\circ {\text{C}}}}{\text{B & }}\xrightarrow{{{\text{ High Temp}}{\text{. }}}}{\text{C}}\)
\( + 2{\text{NaB}}{{\text{O}}_2}\)
\(\mathrm{A}, \mathrm{B}\) and \(\mathrm{C}\) are respectively.

1 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}\)
2 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{B}_{2} \mathrm{O}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{~B}_{2} \mathrm{O}_{3}\)
4 \(\mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}\)
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CHXI11:THE P-BLOCK ELEMENTS

316061 Which of the following does not give borax bead test?

1 \(\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}\)
2 \(\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}\)
3 \(\mathrm{NiSO}_{4}\)
4 \(\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Co}\)
CHXI11:THE P-BLOCK ELEMENTS

316062 Addition of mineral acid to an aqueous solution of borax, the following compound is formed

1 boron hydride
2 pyroboric acid
3 metaboric acid
4 orthoboric acid.
KCET - 2017
CHXI11:THE P-BLOCK ELEMENTS

316063 Assertion :
Coloured cations can be identified by borax bead test.
Reason :
Transparent bead \(\left(\mathrm{NaBO}_{2}+\mathrm{B}_{2} \mathrm{O}_{3}\right)\) forms coloured bead with coloured cation.

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 Both Assertion and Reason is Incorrect
AIIMS - 2009
CHXI11:THE P-BLOCK ELEMENTS

316064 In the reaction
\({\text{N}}{{\text{a}}_2}\;{{\text{B}}_4}{{\text{O}}_7} \cdot 10{{\text{H}}_2}{\text{O }}\xrightarrow{{60^\circ {\text{C}}}}{\text{A}}\xrightarrow{{100^\circ {\text{C}}}}{\text{B & }}\xrightarrow{{{\text{ High Temp}}{\text{. }}}}{\text{C}}\)
\( + 2{\text{NaB}}{{\text{O}}_2}\)
\(\mathrm{A}, \mathrm{B}\) and \(\mathrm{C}\) are respectively.

1 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}\)
2 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{B}_{2} \mathrm{O}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{~B}_{2} \mathrm{O}_{3}\)
4 \(\mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}\)
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CHXI11:THE P-BLOCK ELEMENTS

316061 Which of the following does not give borax bead test?

1 \(\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}\)
2 \(\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}\)
3 \(\mathrm{NiSO}_{4}\)
4 \(\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Co}\)
CHXI11:THE P-BLOCK ELEMENTS

316062 Addition of mineral acid to an aqueous solution of borax, the following compound is formed

1 boron hydride
2 pyroboric acid
3 metaboric acid
4 orthoboric acid.
KCET - 2017
CHXI11:THE P-BLOCK ELEMENTS

316063 Assertion :
Coloured cations can be identified by borax bead test.
Reason :
Transparent bead \(\left(\mathrm{NaBO}_{2}+\mathrm{B}_{2} \mathrm{O}_{3}\right)\) forms coloured bead with coloured cation.

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 Both Assertion and Reason is Incorrect
AIIMS - 2009
CHXI11:THE P-BLOCK ELEMENTS

316064 In the reaction
\({\text{N}}{{\text{a}}_2}\;{{\text{B}}_4}{{\text{O}}_7} \cdot 10{{\text{H}}_2}{\text{O }}\xrightarrow{{60^\circ {\text{C}}}}{\text{A}}\xrightarrow{{100^\circ {\text{C}}}}{\text{B & }}\xrightarrow{{{\text{ High Temp}}{\text{. }}}}{\text{C}}\)
\( + 2{\text{NaB}}{{\text{O}}_2}\)
\(\mathrm{A}, \mathrm{B}\) and \(\mathrm{C}\) are respectively.

1 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}\)
2 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{B}_{2} \mathrm{O}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{~B}_{2} \mathrm{O}_{3}\)
4 \(\mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}\)
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CHXI11:THE P-BLOCK ELEMENTS

316061 Which of the following does not give borax bead test?

1 \(\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}\)
2 \(\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}\)
3 \(\mathrm{NiSO}_{4}\)
4 \(\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Co}\)
CHXI11:THE P-BLOCK ELEMENTS

316062 Addition of mineral acid to an aqueous solution of borax, the following compound is formed

1 boron hydride
2 pyroboric acid
3 metaboric acid
4 orthoboric acid.
KCET - 2017
CHXI11:THE P-BLOCK ELEMENTS

316063 Assertion :
Coloured cations can be identified by borax bead test.
Reason :
Transparent bead \(\left(\mathrm{NaBO}_{2}+\mathrm{B}_{2} \mathrm{O}_{3}\right)\) forms coloured bead with coloured cation.

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 Both Assertion and Reason is Incorrect
AIIMS - 2009
CHXI11:THE P-BLOCK ELEMENTS

316064 In the reaction
\({\text{N}}{{\text{a}}_2}\;{{\text{B}}_4}{{\text{O}}_7} \cdot 10{{\text{H}}_2}{\text{O }}\xrightarrow{{60^\circ {\text{C}}}}{\text{A}}\xrightarrow{{100^\circ {\text{C}}}}{\text{B & }}\xrightarrow{{{\text{ High Temp}}{\text{. }}}}{\text{C}}\)
\( + 2{\text{NaB}}{{\text{O}}_2}\)
\(\mathrm{A}, \mathrm{B}\) and \(\mathrm{C}\) are respectively.

1 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}\)
2 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{B}_{2} \mathrm{O}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{~B}_{2} \mathrm{O}_{3}\)
4 \(\mathrm{B}_{2} \mathrm{O}_{3}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}, \mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} .5 \mathrm{H}_{2} \mathrm{O}\)
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