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प्रश्न
Identify the metal and justify your answer.
Carbonyl \[\ce{M(CO)5}\]
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उत्तर
\[\ce{Fe(CO)5}\] as per EAN Rule.
EAN Rule: Effective atomic number (EAN), number that represents the total number of electrons surrounding the nucleus of a metal atom in a metal complex.
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संबंधित प्रश्न
Why do interstitial compounds have higher melting points than corresponding pure metals?
Account for the following:
Cr2+ is a strong reducing agent.
How would you account for the following : Transition metals form coloured compounds
How would you account for the following:
Of the d4 species, Cr2+ is strongly reducing while manganese (III) is strongly oxidising.
How would you account for the following:
The d1 configuration is very unstable in ions.
Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following point:
Electronic configurations
Write down the number of 3d electrons in the following ion:
Cu2+
Indicate how would you expect the five 3d orbitals to be occupied for this hydrated ions (octahedral).
An antifriction alloy made up of antimony with tin and copper, which is extensively used in machine bearings is called _______.
(A) Duralumin
(B) Babbitt metal
(C) Spiegeleisen
(D) Amalgam
Complete and balance the following chemical equations
`Fe^(2+) + MnO_4^(-) + H^+ ->`
Give reasons for the following:
The transition metals generally form coloured compounds.
Metallic radii of some transition elements are given below. Which of these elements will have highest density?
| Element | \[\ce{Fe}\] | \[\ce{Co}\] | \[\ce{Ni}\] | \[\ce{Cu}\] |
| Metallic radii/pm | 126 | 125 | 125 | 128 |
Generally transition elements form coloured salts due to the presence of unpaired electrons. Which of the following compounds will be coloured in solid-state?
Interstitial compounds are formed when small atoms are trapped inside the crystal lattice of metals. Which of the following is not the characteristic property of interstitial compounds?
EΘ of Cu is + 0.34V while that of Zn is – 0.76V. Explain.
Assertion: The highest oxidation state of osmium is +8.
Reason: Osmium is a 5d-block element.
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 property of transition metals enables them to behave as catalysts?
A transition element X has an electronic configuration [Ar]4s23d3. Predict its likely oxidation states.
Account for the following:
Copper has an exceptionally positive `"E"_("M"^(2+)//"M")^0` value.
