Assign reasons for each of the following :(i) Transition metals generally form coloured compounds.(ii) Manganese exhibits the highest oxidation state of +7 among the 3d series of transition elements.

Q: What are the oxidation states of manganese in the following series of oxides? MnO, MnO2, Mn2O3,…

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Q: (a) Explain the major difference between the number of oxidation states of most transition elements…

A: ANSWER IS :

Q: (d) [Cr(OH)2]¿** ions are pale blue-green but chromate (Cr,0,) ion is an intense yellow in colour.…

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Q: 2) What is one of the major hazards associated with potassium dichromate?

A: Potassium dichromate molecular formula is K2Cr2O7.

Q: (d) [Cr(OH)2]¿* ions are pale blue-green but chromate (Cr,O,) ion is an intense yellow in colour.…

A: Ans: [Cr(H2O)6]3+ is pale green beacuse in this complex Cr has +3 oxidation state with d3…

Q: Transition elements or their compounds have the following characteristics. 1. Some are paramagnetic…

A: Transition elements are those having partially filled d orbitals.

Q: How would you account for the following? (i) Transition metals exhibit variable oxidation states.…

A: The elements present in the d-block of the periodic table are known as transition metals as they…

Q: Which oxide, CrO3 or CrO, is more acidic in water? Why?

A: To determine the nature of oxide whether it is acidic or basic, we have a general observation that…

Q: In which compound does Cr exhibit greater metallic behavior, CrF2 or CrF6? Explain

A: The oxidation number represents the number of electrons gain or loses by an element to become…

Q: Assign a reason for each of the following observations:(i) The transition metals (with the exception…

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Q: What is a transition metal in the fourth period from the following list: N, Cu, Ag, Yb?

A: Transition metals are the elements that are placed in the d-block of the modern periodic table.…

Q: [Cu (NH3) 4] SO4.H2O Describe the geometric structure of the compound with VBT by writing the…

A: Using concept of VBT to determine the geometry of co ordination compounds.

Q: Why is zinc not regarded as a transition element?

A: Transition metal has incomplete d subshell in one or more than one oxidation state.

Q: Among the period 4 transition metals, which elements do not form ions where there are partially…

A: Zinc has completely filled d orbital, it loses 2 electrons from 4s orbital to form Zn+2 ion.

Q: State reasons for the following observations: (i) The enthalpies of atomisation of transition…

A: Transition elements have high effective nuclear charge and a large number of valence electrons.…

Q: Suggest why the fluoride compound in which chromium has its highest oxidation state is CrF6 whereas…

A: The two compounds CrF6 and CrCl4 are given.

Q: 15. Transition elements or their compounds have the following characteristics. 1. Some are…

A: The elements in which the d-orbitals are partially filled known as the transition elements. The…

Q: 3+ (d) [Cr(OH)2]6* ions are pale blue-green but chromate (Cr,O,) ion is an intense yellow in colour.…

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Q: On the basis of the 18-electron rule, identify the first-row transition metal for each of the…

A: We have to identify the first row transition element for the given metal complex on the basis of…

Q: How would you account for the following :(i) Among lanthanoids, Ln (III) compounds are predominant.…

A: Most common oxidation state of Lanthanoids = +3

Q: 16 1 1111 Example 4. Why do the transition elements exhibit higher enthalpies of atomisation? ( ADA…

A: The transition elements exhibit higher enthalpy of atomisation because

Q: Which transition metal atom is present in each of the following biologically important molecules:…

A: Siderophores are small, high-affinity iron-chelating compounds that are secreted by microorganisms…

Q: (a) What is the range in electronegativity across the first (3d)transition series? (b) What is the…

A: (a) Transition elements exhibit a relatively small change in electronegativity consistent with the…

Q: The complexes (V(H2O)6)^3+ and (VF6)3- are known .what gives rise to their color and which of them…

A: In the above two complexes, Vanadium is in the +3 oxidation state. The electronic configuration of…

Q: How would you account for the following: (i) Metal-metal bonding is more extensive in the 4d and 5d…

A: Metal from the Greek term (métallon), "mine, quarry, metal") is a substance that, when properly…

Q: Explain the following :(a) The enthalpies of atomization of transition metals are quite high.(b) The…

A: a. The effective nuclear charge is large and high number of valence electrons of transition elements…

Q: Suggest a reason why copper(II) compounds are often colored but copper(I) compounds are colorless.

A: Given :  why copper(II) compounds are often colored but copper(I) compounds are colorless ?  To…

Q: Why do transition metals often react chemically as if they have a valence of 2?

A: the explanation is as follows:

Q: Which oxide, Mn₂O₃ or Mn₂O₇, is more basic in water?Why?

A: An acidic oxide is considered as an oxide that reacts with water to deliver an acid. The basic…

Q: Explain the following observations :(i) Copper atom has completely filled d orbitals (3d10) in its…

A: The elements in which the last electron is filled in d sub shell are known as transition elements.

Q: (a) What is the lanthanide contraction? (b) How does it affectatomic size down a group of transition…

A: Lanthanoid contraction, in chemistry, is the steady decrease in the size of the atoms and ions of…

Q: How would you account for the following: (i) Among lanthanoids, Ln(III) compounds are predominant.…

A: To find: How will account for the given statements.

Q: On the basis of the 18-electron rule, identify the first-row transition metal for each of the…

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Q: The decavanadate ion is a complex species with chemicalformula V O10 282-. It reacts with an excess…

A: The oxidation number represents the number of electrons gain or loses by an element to become…

Q: Explain the following observations: (i) The enthalpies of atomisation of transition metals are quite…

A: The given observations have to be explained,

Q: On the basis of the 18-electron rule, identify the first-row transition metal for each of the…

A:

Q: Describe the periodic trends in radii and oxidation states of the transition-metal ions, including…

A: Lanthanide contraction occurs due to an increase in the effective nuclear charge with an increasing…