NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXI11:THE P-BLOCK ELEMENTS
316834
Among the following, the incorrect statement is
1 pyrophosphorus acid, \({{\rm{H}}_{\rm{4}}}{{\rm{P}}_{\rm{2}}}{{\rm{O}}_{\rm{5}}}\) is dibasic and reducing agent.
2 hypophosphorus acid, \(\mathrm{H}_{3} \mathrm{PO}_{2}\) is monobasic and a very strong oxidizing agent
3 impure orthophosphoric acid, \(\mathrm{H}_{3} \mathrm{PO}_{4}\) is prepared on a large scale by treating phosphate rock with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
4 phosphorus in the phosphorus acid \(\left(\mathrm{H}_{3} \mathrm{PO}_{3}\right)\) is in +3 oxidation state and has a \(\mathrm{P}-\mathrm{H}\) bond and is therefore a reducing agent
Explanation:
\(\mathrm{H}_{3} \mathrm{PO}_{2}\) is monobasic and strong reducing agent.
CHXI11:THE P-BLOCK ELEMENTS
316835
Which of the following statements is not valid for oxoacids of phosphorus?
1 Orthophosphoric acid is used in the manufacture of triple super phosphate
2 Hypophosphorous acid is a diprotic acid
3 All oxoacids contain tetrahedral four coordinated phosphorus
4 All oxo-acids contain at least one \(\mathrm{P}=\mathrm{O}\) unit and one P-OH group
Explanation:
Hypophosphorous acid \(\mathrm{H}_{3} \mathrm{PO}_{2}\) has the following structure. As, it contains only one replaceable \(\mathrm{H}\)-atom (that is attached with \(\mathrm{O}\), not with \(\mathrm{P}\) directly) so it is a monoprotic acid.All other given statements are true.
CHXI11:THE P-BLOCK ELEMENTS
316836
Which of the following oxyacid does not contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bond?
1 Isohypophosphoric acid
2 Pyrophosphorus acid
3 Diphosphoric acid
4 Hypophosphoric acid
Explanation:
Hypophosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}\right)\) does not contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bond whereas isohypophosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}\right)\), diphosphorus acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}\right)\) and diphosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}\right)\) all contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bonds. The structures of oxyacids of phosphorus are
316834
Among the following, the incorrect statement is
1 pyrophosphorus acid, \({{\rm{H}}_{\rm{4}}}{{\rm{P}}_{\rm{2}}}{{\rm{O}}_{\rm{5}}}\) is dibasic and reducing agent.
2 hypophosphorus acid, \(\mathrm{H}_{3} \mathrm{PO}_{2}\) is monobasic and a very strong oxidizing agent
3 impure orthophosphoric acid, \(\mathrm{H}_{3} \mathrm{PO}_{4}\) is prepared on a large scale by treating phosphate rock with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
4 phosphorus in the phosphorus acid \(\left(\mathrm{H}_{3} \mathrm{PO}_{3}\right)\) is in +3 oxidation state and has a \(\mathrm{P}-\mathrm{H}\) bond and is therefore a reducing agent
Explanation:
\(\mathrm{H}_{3} \mathrm{PO}_{2}\) is monobasic and strong reducing agent.
CHXI11:THE P-BLOCK ELEMENTS
316835
Which of the following statements is not valid for oxoacids of phosphorus?
1 Orthophosphoric acid is used in the manufacture of triple super phosphate
2 Hypophosphorous acid is a diprotic acid
3 All oxoacids contain tetrahedral four coordinated phosphorus
4 All oxo-acids contain at least one \(\mathrm{P}=\mathrm{O}\) unit and one P-OH group
Explanation:
Hypophosphorous acid \(\mathrm{H}_{3} \mathrm{PO}_{2}\) has the following structure. As, it contains only one replaceable \(\mathrm{H}\)-atom (that is attached with \(\mathrm{O}\), not with \(\mathrm{P}\) directly) so it is a monoprotic acid.All other given statements are true.
CHXI11:THE P-BLOCK ELEMENTS
316836
Which of the following oxyacid does not contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bond?
1 Isohypophosphoric acid
2 Pyrophosphorus acid
3 Diphosphoric acid
4 Hypophosphoric acid
Explanation:
Hypophosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}\right)\) does not contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bond whereas isohypophosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}\right)\), diphosphorus acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}\right)\) and diphosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}\right)\) all contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bonds. The structures of oxyacids of phosphorus are
316834
Among the following, the incorrect statement is
1 pyrophosphorus acid, \({{\rm{H}}_{\rm{4}}}{{\rm{P}}_{\rm{2}}}{{\rm{O}}_{\rm{5}}}\) is dibasic and reducing agent.
2 hypophosphorus acid, \(\mathrm{H}_{3} \mathrm{PO}_{2}\) is monobasic and a very strong oxidizing agent
3 impure orthophosphoric acid, \(\mathrm{H}_{3} \mathrm{PO}_{4}\) is prepared on a large scale by treating phosphate rock with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
4 phosphorus in the phosphorus acid \(\left(\mathrm{H}_{3} \mathrm{PO}_{3}\right)\) is in +3 oxidation state and has a \(\mathrm{P}-\mathrm{H}\) bond and is therefore a reducing agent
Explanation:
\(\mathrm{H}_{3} \mathrm{PO}_{2}\) is monobasic and strong reducing agent.
CHXI11:THE P-BLOCK ELEMENTS
316835
Which of the following statements is not valid for oxoacids of phosphorus?
1 Orthophosphoric acid is used in the manufacture of triple super phosphate
2 Hypophosphorous acid is a diprotic acid
3 All oxoacids contain tetrahedral four coordinated phosphorus
4 All oxo-acids contain at least one \(\mathrm{P}=\mathrm{O}\) unit and one P-OH group
Explanation:
Hypophosphorous acid \(\mathrm{H}_{3} \mathrm{PO}_{2}\) has the following structure. As, it contains only one replaceable \(\mathrm{H}\)-atom (that is attached with \(\mathrm{O}\), not with \(\mathrm{P}\) directly) so it is a monoprotic acid.All other given statements are true.
CHXI11:THE P-BLOCK ELEMENTS
316836
Which of the following oxyacid does not contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bond?
1 Isohypophosphoric acid
2 Pyrophosphorus acid
3 Diphosphoric acid
4 Hypophosphoric acid
Explanation:
Hypophosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}\right)\) does not contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bond whereas isohypophosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}\right)\), diphosphorus acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}\right)\) and diphosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}\right)\) all contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bonds. The structures of oxyacids of phosphorus are
316834
Among the following, the incorrect statement is
1 pyrophosphorus acid, \({{\rm{H}}_{\rm{4}}}{{\rm{P}}_{\rm{2}}}{{\rm{O}}_{\rm{5}}}\) is dibasic and reducing agent.
2 hypophosphorus acid, \(\mathrm{H}_{3} \mathrm{PO}_{2}\) is monobasic and a very strong oxidizing agent
3 impure orthophosphoric acid, \(\mathrm{H}_{3} \mathrm{PO}_{4}\) is prepared on a large scale by treating phosphate rock with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
4 phosphorus in the phosphorus acid \(\left(\mathrm{H}_{3} \mathrm{PO}_{3}\right)\) is in +3 oxidation state and has a \(\mathrm{P}-\mathrm{H}\) bond and is therefore a reducing agent
Explanation:
\(\mathrm{H}_{3} \mathrm{PO}_{2}\) is monobasic and strong reducing agent.
CHXI11:THE P-BLOCK ELEMENTS
316835
Which of the following statements is not valid for oxoacids of phosphorus?
1 Orthophosphoric acid is used in the manufacture of triple super phosphate
2 Hypophosphorous acid is a diprotic acid
3 All oxoacids contain tetrahedral four coordinated phosphorus
4 All oxo-acids contain at least one \(\mathrm{P}=\mathrm{O}\) unit and one P-OH group
Explanation:
Hypophosphorous acid \(\mathrm{H}_{3} \mathrm{PO}_{2}\) has the following structure. As, it contains only one replaceable \(\mathrm{H}\)-atom (that is attached with \(\mathrm{O}\), not with \(\mathrm{P}\) directly) so it is a monoprotic acid.All other given statements are true.
CHXI11:THE P-BLOCK ELEMENTS
316836
Which of the following oxyacid does not contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bond?
1 Isohypophosphoric acid
2 Pyrophosphorus acid
3 Diphosphoric acid
4 Hypophosphoric acid
Explanation:
Hypophosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}\right)\) does not contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bond whereas isohypophosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}\right)\), diphosphorus acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}\right)\) and diphosphoric acid \(\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}\right)\) all contain \(\mathrm{P}-\mathrm{O}-\mathrm{P}\) bonds. The structures of oxyacids of phosphorus are
