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Name one ore each of manganese and chrom...

Name one ore each of manganese and chromium.

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To answer the question, we need to identify one ore for manganese and one ore for chromium. Let's break this down step by step. ### Step-by-Step Solution: 1. **Understanding Ores**: Ores are naturally occurring solid materials from which a metal or valuable mineral can be extracted profitably. 2. **Identifying the Ore for Manganese**: - Manganese is commonly extracted from the ore known as **pyrolucite**. ...
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ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. What are platinum metals ?

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  2. What is the highest oxidation state shown by a transition element.

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  3. Name one ore each of manganese and chromium.

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  4. What do you mean by 18 carat gold ?

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  5. Out of Al, Zn, Mg and Fe which is the densest element?

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  6. Which is more stable Fe^(2+) or Fe^(3+)? Why ?

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  7. Why is Pt(IV) more stable than Ni(IV).

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  8. K2 Pt Cl6 is well known compound while corresponding Ni compound is n...

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  9. Why is electronic configuration 1s^2 2s^2 2p^6 3s^2 3p^6 3d^4 4s^2 n...

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  10. How does the ionic/covalent character of the compounds of a transition...

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  11. Why do transition elements have high value of hydration enthalpy?

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  12. Why Fe^(2+) has smaller radius than Mn^(2+) ?

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  13. Why do most transition metal ions exhibit paramagnetism ?

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  14. How is the magnetic moment of a species related to the number of unpai...

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  15. The electronic configuration of Co^(2+) and Cu^(2+) is d^7 and d^(9) r...

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  16. Which of the following is paramagnetic ? Sc^(3+) (Z=21),Cu^(+)(Z=29)

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  17. Why is Ti^(2+) ion paramagnetic ?

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  18. One unpaired electron in an atom contributes a magnetic moment of 1.1 ...

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  19. Why do transition elements shows variable oxidation states?

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  20. Why are complex ions readily formed when water molecules react with th...

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