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Identify the incorrect statement.
  • a)
    The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.
  • b)
    Interstitial compounds are those that are formed when small atoms like H,C or N are trapped inside the crystal lattices of metals
  • c)
    The oxidation states of chromium in CrO42− and Cr2O72− are not the same.
  • d)
    Cr2+(d4) is a stronger reducing agent than Fe2+(d6) in water.
Correct answer is option 'C'. Can you explain this answer?
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Identify the incorrect statement.a)The transition metals and their co...
Oxidation state of Cr in CrO42− and Cr2O72− is +6 i.e. oxidation states are same.
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Identify the incorrect statement.a)The transition metals and their co...
The incorrect statement is option C: The oxidation states of chromium in CrO42− and Cr2O72− are not the same.

Explanation:
Transition metals are known for their ability to adopt multiple oxidation states. These oxidation states are due to the presence of partially filled d orbitals in their electronic configurations. This property allows transition metals to form complexes and exhibit catalytic activity.

a) Catalytic activity of transition metals:
Transition metals and their compounds are known for their catalytic activity. This is because they can undergo oxidation-reduction reactions by changing their oxidation states. The partially filled d orbitals in these metals allow them to accept or donate electrons, making them effective catalysts for various chemical reactions.

b) Interstitial compounds:
Interstitial compounds are formed when small atoms, such as hydrogen (H), carbon (C), or nitrogen (N), are trapped in the interstitial sites within the crystal lattices of metals. These compounds are characterized by the presence of small atoms occupying the spaces between the metal atoms in a crystal structure. This leads to changes in the physical and chemical properties of the metal.

c) Oxidation states of chromium:
The oxidation states of chromium in CrO42− and Cr2O72− are indeed the same. In both compounds, chromium has an oxidation state of +6. In CrO42−, the oxidation state of oxygen is -2. Therefore, to balance the charges, the chromium ion must have an oxidation state of +6. Similarly, in Cr2O72−, the oxidation state of oxygen is -2, and the two chromium ions must have an oxidation state of +6 each to balance the charges.

d) Reducing agent strength of Cr2 (d4) and Fe2 (d6):
In water, the reducing agent strength of a transition metal depends on its ability to donate electrons. The strength of a reducing agent is related to its oxidation state and the stability of its oxidation state. In general, a lower oxidation state is associated with a stronger reducing agent. Therefore, Cr2 (d4), with an oxidation state of +2, is a stronger reducing agent than Fe2 (d6), with an oxidation state of +3.
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Read the passage given below and answer the following questions:The transition metals when exposed to oxygen at low and intermediate temperatures form thin, protective oxide films of up to some thousands of Angstroms in thickness. Transition metal oxides lie between the extremes of ionic and covalent binary compounds formed by elements from the left or right side of the periodic table. They range from metallic to semiconducting and deviate by both large and small degrees from stoichiometry. Since d-electron bonding levels are involved, the cations-exist in various valence states and hence give rise to a large number of oxides. The crystal structures are often classified by considering a cubic or hexagonal close-packed lattice of one set of ions with the other set of ions filling the octahedral or tetrahedral interstices. The actual oxide structures, however, generally show departures from such regular arrays due in part to distortions caused by packing of ions of different size and to ligand field effects. These distortions depend not only on the number of d-electrons but also on the valence and the position of the transition metal in a period or group.In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion (

Read the passage given below and answer the following questions:The transition metals when exposed to oxygen at low and intermediate temperatures form thin, protective oxide films of up to some thousands of Angstroms in thickness. Transition metal oxides lie between the extremes of ionic and covalent binary compounds formed by elements from the left or right side of the periodic table. They range from metallic to semiconducting and deviate by both large and small degrees from stoichiometry. Since d-electron bonding levels are involved, the cations-exist in various valence states and hence give rise to a large number of oxides. The crystal structures are often classified by considering a cubic or hexagonal close-packed lattice of one set of ions with the other set of ions filling the octahedral or tetrahedral interstices. The actual oxide structures, however, generally show departures from such regular arrays due in part to distortions caused by packing of ions of different size and to ligand field effects. These distortions depend not only on the number of d-electrons but also on the valence and the position of the transition metal in a period or group.In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion (

Read the passage given below and answer the following questions:The d block elements are the 40 elements contained in the four rows of ten columns (3-12) in the periodic table. As all the d block elements are metallic, the term d-block metals is synonymous. This set of d-block elements is also often identified as the transition metals, but sometimes the group 12 elements (zinc, cadmium, mercury) are excluded from the transition metals as the transition elements are defined as those with partly filled d or f shells in their compounds. Inclusion of the elements zinc, cadmium and mercury is necessary as some properties of the group 12 elements are appropriate logically to include with a discussion of transition metal chemistry. The term transition element or transition metal appeared to derive from early studies of periodicity such as the Mendeleev periodic table of the elements. His horizontal table of the elements was an attempt to group the elements together so that the chemistry of elements might be explained and predicted. In this table there are eight groups labeled I-VIII with each subdivided into A and B subgroups. Mendeleev recognized that certain properties of elements in Group VIII are related to those of some of the elements in Group VII and those at the start of the next row Group I. In that sense, these elements might be described as possessing properties transitional from one row of the table to the next.In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion (

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Identify the incorrect statement.a)The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.b)Interstitial compounds are those that are formed when small atoms like H,C or N are trapped inside the crystal lattices of metalsc)The oxidation states of chromium in CrO42− and Cr2O72− are not the same.d)Cr2+(d4) is a stronger reducing agent than Fe2+(d6) in water.Correct answer is option 'C'. Can you explain this answer?
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Identify the incorrect statement.a)The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.b)Interstitial compounds are those that are formed when small atoms like H,C or N are trapped inside the crystal lattices of metalsc)The oxidation states of chromium in CrO42− and Cr2O72− are not the same.d)Cr2+(d4) is a stronger reducing agent than Fe2+(d6) in water.Correct answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Identify the incorrect statement.a)The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.b)Interstitial compounds are those that are formed when small atoms like H,C or N are trapped inside the crystal lattices of metalsc)The oxidation states of chromium in CrO42− and Cr2O72− are not the same.d)Cr2+(d4) is a stronger reducing agent than Fe2+(d6) in water.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Identify the incorrect statement.a)The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.b)Interstitial compounds are those that are formed when small atoms like H,C or N are trapped inside the crystal lattices of metalsc)The oxidation states of chromium in CrO42− and Cr2O72− are not the same.d)Cr2+(d4) is a stronger reducing agent than Fe2+(d6) in water.Correct answer is option 'C'. Can you explain this answer?.
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