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प्रश्न
ln which pair highest oxidation states of transition metals are found:
पर्याय
nitriles and chlorides
fluorides and chlorides
fluorides and oxides
nitriles and oxides
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उत्तर
fluorides and oxides
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संबंधित प्रश्न
What are interstitial compounds?
What may be the stable oxidation state of the transition element with the following d electron configuration in the ground state of its atom?
3d3
Following are the transition metal ions of 3d series:
Ti4+, V2+, Mn3+, Cr3+
(Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24)
Answer the following:
1) Which ion is most stable in an aqueous solution and why?
2) Which ion is a strong oxidising agent and why?
3) Which ion is colourless and why?
Give reasons: Sc3+ is colourless in aqueous solution whereas Ti3+ is coloured.
How is potassium dichromate prepared from chrome iron ore?
The magnetic moment is associated with its spin angular momentum and orbital angular momentum. Spin only magnetic moment value of \[\ce{Cr^{3+}}\] ion is ______.
Highest oxidation state of manganese in fluoride is \[\ce{+4 (MnF4)}\] but highest oxidation state in oxides is \[\ce{+7 (Mn2O7)}\] because ______.
A solution of \[\ce{KMnO4}\] on reduction yields either a colourless solution or a brown precipitate or a green solution depending on pH of the solution. What different stages of the reduction do these represent and how are they carried out?
The halides of transition elements become more covalent with increasing oxidation state of the metal. Why?
Assertion: \[\ce{Cu^2+}\] iodide is not known.
Reason: \[\ce{Cu^2+}\] oxidises \[\ce{I^-}\] to iodine.
When an oxide of manganese (A) is fused with KOH in the presence of an oxidising agent and dissolved in water, it gives a dark green solution of compound (B). Compound (B) disproportionates in neutral or acidic solution to give purple compound (C). An alkaline solution of compound (C) oxidises potassium iodide solution to a compound (D) and compound (A) is also formed. Identify compounds A to D and also explain the reactions involved.
Mention any three processes where transition metals act as catalysts.
Which of the following is non-metallic?
The orientation of an atomic orbital is governed by
On strong heating AgNO3, the gases evolved are:-
The spin magnetic moment of cobalt in the compound Hg [Co(SCN)4] is:-
Passing H2S gas into a mixture of Mn2+ and Ni2+, Cu2+, ions in an acidified aqueous solution precipitates.
Which of the following species has maximum magnetic momentum?
The basic character of transition metals monoxide follow the order.
Agcl is soluble in NH4OH. The solubility is due to the information of:-
Give reason for the following statement:
Physical and chemical properties of the 4d and 5d series of the transition elements are quite similar to expected.
Account for the following:
Sc3+ is colourless whereas Ti3+ is coloured in an aqueous solution.
Write the number of unpaired electrons in Cr3+.
(Atomic number of Cr = 24)
Give two similarities in the properties of Sc and Zn.
Give a reason for the following:
Zinc, cadmium and mercury are considered as d-block elements but not regarded as transition elements.
Account for the following:
Zirconium (Zr) and Hafnium (Hf) are difficult to separate.
‘Spin only’ magnetic moment is the same for which of the following ions?
- Ti3+
- Cr2+
- Mn2+
- Fe2+
- Sc3+
Choose the most appropriate answer from the options given below:
