316843
In a cyclotrimetaphosphoric acid molecule, how many bonds are present?
1 3 double bonds; 9 single bonds
2 6 double bonds; 6 single bonds
3 3 double bonds; 12 single bonds
4 Zero double bonds; 12 single bonds.
Explanation:
\(\mathrm{CuS}+2 \mathrm{HNO}_{3} \rightarrow \mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+\mathrm{H}_{2} \mathrm{~S}\) \(\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+4 \mathrm{NH}_{3} \rightarrow \underset{\text { deep blue solution }}{\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{+2}}+2 \mathrm{NO}_{3}^{-}\) Cyclic form of meta phosphoric acid
CHXI11:THE P-BLOCK ELEMENTS
316844
Assertion : \(\mathrm{H}_{3} \mathrm{PO}_{2}\) has strong reducing property but \(\mathrm{H}_{3} \mathrm{PO}_{4}\) does not. Reason : \(\mathrm{P}-\mathrm{H}\) bond is not present in \(\mathrm{H}_{3} \mathrm{PO}_{4}\).
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:
Oxoacids of phosphorus that contain \(\mathrm{P}-\mathrm{H}\) bonds serve as reducing agents, enabling them to reduce metal salts to their elemental forms. Consequently, \(\mathrm{H}_{3} \mathrm{PO}_{2}\) acts as a reducing agent, while \(\mathrm{H}_{3} \mathrm{PO}_{4}\) does not possess this reducing ability. So option (1) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316845
The pair in which phosphorous atoms have a formal oxidation state of +3 is:
1 Pyrophosphorous and hypophosphoric acids
2 Orthophosphorus and hypophosphoric acids
3 Pyrophosphorous and pyrophosphoric acids
4 Orthophosphorous and pyrophosphorous acids
Explanation:
\(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5} \Rightarrow\) pyrophosphorous acid (P is in +3 oxidation state) \(\mathrm{H}_{3} \mathrm{PO}_{3} \Rightarrow\) orthophosphorous acid ( \(\mathrm{P}\) is in +3 oxidation state)
CHXI11:THE P-BLOCK ELEMENTS
316846
Which one of the following oxoacids of phosphorus can reduce \(\mathrm{AgNO}_3\) to metallic silver?
1 \(\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_6\)
2 \(\mathrm{H}_3 \mathrm{PO}_4\)
3 \(\mathrm{H}_3 \mathrm{PO}_2\)
4 \(\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7\)
Explanation:
\(\mathrm{H}_3 \mathrm{PO}_2\) is reducing in nature.
316843
In a cyclotrimetaphosphoric acid molecule, how many bonds are present?
1 3 double bonds; 9 single bonds
2 6 double bonds; 6 single bonds
3 3 double bonds; 12 single bonds
4 Zero double bonds; 12 single bonds.
Explanation:
\(\mathrm{CuS}+2 \mathrm{HNO}_{3} \rightarrow \mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+\mathrm{H}_{2} \mathrm{~S}\) \(\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+4 \mathrm{NH}_{3} \rightarrow \underset{\text { deep blue solution }}{\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{+2}}+2 \mathrm{NO}_{3}^{-}\) Cyclic form of meta phosphoric acid
CHXI11:THE P-BLOCK ELEMENTS
316844
Assertion : \(\mathrm{H}_{3} \mathrm{PO}_{2}\) has strong reducing property but \(\mathrm{H}_{3} \mathrm{PO}_{4}\) does not. Reason : \(\mathrm{P}-\mathrm{H}\) bond is not present in \(\mathrm{H}_{3} \mathrm{PO}_{4}\).
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:
Oxoacids of phosphorus that contain \(\mathrm{P}-\mathrm{H}\) bonds serve as reducing agents, enabling them to reduce metal salts to their elemental forms. Consequently, \(\mathrm{H}_{3} \mathrm{PO}_{2}\) acts as a reducing agent, while \(\mathrm{H}_{3} \mathrm{PO}_{4}\) does not possess this reducing ability. So option (1) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316845
The pair in which phosphorous atoms have a formal oxidation state of +3 is:
1 Pyrophosphorous and hypophosphoric acids
2 Orthophosphorus and hypophosphoric acids
3 Pyrophosphorous and pyrophosphoric acids
4 Orthophosphorous and pyrophosphorous acids
Explanation:
\(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5} \Rightarrow\) pyrophosphorous acid (P is in +3 oxidation state) \(\mathrm{H}_{3} \mathrm{PO}_{3} \Rightarrow\) orthophosphorous acid ( \(\mathrm{P}\) is in +3 oxidation state)
CHXI11:THE P-BLOCK ELEMENTS
316846
Which one of the following oxoacids of phosphorus can reduce \(\mathrm{AgNO}_3\) to metallic silver?
1 \(\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_6\)
2 \(\mathrm{H}_3 \mathrm{PO}_4\)
3 \(\mathrm{H}_3 \mathrm{PO}_2\)
4 \(\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7\)
Explanation:
\(\mathrm{H}_3 \mathrm{PO}_2\) is reducing in nature.
316843
In a cyclotrimetaphosphoric acid molecule, how many bonds are present?
1 3 double bonds; 9 single bonds
2 6 double bonds; 6 single bonds
3 3 double bonds; 12 single bonds
4 Zero double bonds; 12 single bonds.
Explanation:
\(\mathrm{CuS}+2 \mathrm{HNO}_{3} \rightarrow \mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+\mathrm{H}_{2} \mathrm{~S}\) \(\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+4 \mathrm{NH}_{3} \rightarrow \underset{\text { deep blue solution }}{\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{+2}}+2 \mathrm{NO}_{3}^{-}\) Cyclic form of meta phosphoric acid
CHXI11:THE P-BLOCK ELEMENTS
316844
Assertion : \(\mathrm{H}_{3} \mathrm{PO}_{2}\) has strong reducing property but \(\mathrm{H}_{3} \mathrm{PO}_{4}\) does not. Reason : \(\mathrm{P}-\mathrm{H}\) bond is not present in \(\mathrm{H}_{3} \mathrm{PO}_{4}\).
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:
Oxoacids of phosphorus that contain \(\mathrm{P}-\mathrm{H}\) bonds serve as reducing agents, enabling them to reduce metal salts to their elemental forms. Consequently, \(\mathrm{H}_{3} \mathrm{PO}_{2}\) acts as a reducing agent, while \(\mathrm{H}_{3} \mathrm{PO}_{4}\) does not possess this reducing ability. So option (1) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316845
The pair in which phosphorous atoms have a formal oxidation state of +3 is:
1 Pyrophosphorous and hypophosphoric acids
2 Orthophosphorus and hypophosphoric acids
3 Pyrophosphorous and pyrophosphoric acids
4 Orthophosphorous and pyrophosphorous acids
Explanation:
\(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5} \Rightarrow\) pyrophosphorous acid (P is in +3 oxidation state) \(\mathrm{H}_{3} \mathrm{PO}_{3} \Rightarrow\) orthophosphorous acid ( \(\mathrm{P}\) is in +3 oxidation state)
CHXI11:THE P-BLOCK ELEMENTS
316846
Which one of the following oxoacids of phosphorus can reduce \(\mathrm{AgNO}_3\) to metallic silver?
1 \(\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_6\)
2 \(\mathrm{H}_3 \mathrm{PO}_4\)
3 \(\mathrm{H}_3 \mathrm{PO}_2\)
4 \(\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7\)
Explanation:
\(\mathrm{H}_3 \mathrm{PO}_2\) is reducing in nature.
316843
In a cyclotrimetaphosphoric acid molecule, how many bonds are present?
1 3 double bonds; 9 single bonds
2 6 double bonds; 6 single bonds
3 3 double bonds; 12 single bonds
4 Zero double bonds; 12 single bonds.
Explanation:
\(\mathrm{CuS}+2 \mathrm{HNO}_{3} \rightarrow \mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+\mathrm{H}_{2} \mathrm{~S}\) \(\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+4 \mathrm{NH}_{3} \rightarrow \underset{\text { deep blue solution }}{\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{+2}}+2 \mathrm{NO}_{3}^{-}\) Cyclic form of meta phosphoric acid
CHXI11:THE P-BLOCK ELEMENTS
316844
Assertion : \(\mathrm{H}_{3} \mathrm{PO}_{2}\) has strong reducing property but \(\mathrm{H}_{3} \mathrm{PO}_{4}\) does not. Reason : \(\mathrm{P}-\mathrm{H}\) bond is not present in \(\mathrm{H}_{3} \mathrm{PO}_{4}\).
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:
Oxoacids of phosphorus that contain \(\mathrm{P}-\mathrm{H}\) bonds serve as reducing agents, enabling them to reduce metal salts to their elemental forms. Consequently, \(\mathrm{H}_{3} \mathrm{PO}_{2}\) acts as a reducing agent, while \(\mathrm{H}_{3} \mathrm{PO}_{4}\) does not possess this reducing ability. So option (1) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316845
The pair in which phosphorous atoms have a formal oxidation state of +3 is:
1 Pyrophosphorous and hypophosphoric acids
2 Orthophosphorus and hypophosphoric acids
3 Pyrophosphorous and pyrophosphoric acids
4 Orthophosphorous and pyrophosphorous acids
Explanation:
\(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5} \Rightarrow\) pyrophosphorous acid (P is in +3 oxidation state) \(\mathrm{H}_{3} \mathrm{PO}_{3} \Rightarrow\) orthophosphorous acid ( \(\mathrm{P}\) is in +3 oxidation state)
CHXI11:THE P-BLOCK ELEMENTS
316846
Which one of the following oxoacids of phosphorus can reduce \(\mathrm{AgNO}_3\) to metallic silver?
1 \(\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_6\)
2 \(\mathrm{H}_3 \mathrm{PO}_4\)
3 \(\mathrm{H}_3 \mathrm{PO}_2\)
4 \(\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7\)
Explanation:
\(\mathrm{H}_3 \mathrm{PO}_2\) is reducing in nature.
