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In the quantitative volumetric analysis,...

In the quantitative volumetric analysis, why is `K_(2)Cr_(2)O_(7)` preferred over `Na_(2)Cr_(2)O_(7)` ?

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`Na_(2)Cr_(2)O_(7)` is a deliquescent and so it is not used to prepare primary standard solution, whereas `K_(2)Cr_(2)O_(7)` is not a deliquescent substance and hence it is preferred over `Na_(2)Cr_(2)O_(7)`.
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CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -QUESTION - ANSWER ZONE FOR BOARD EXAMINATION (SHORT ANSWER TYPE)
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  2. Transition elements form interstitial compounds. Why ?

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  4. Name the product formed on heating potassium permanganate. Write the b...

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  5. Write the trends : Melting points of the transition elements in each s...

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  6. Write the trends : The atomic radius of the inner transition elements ...

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  7. What happens when KMnO(4) reacts with conc. HCl ?

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  8. What happens when hydrogen sulphide is added to acidified potassium di...

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  9. Explain why transition elements have many irregularities in their elec...

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  10. Explain why iron is a transition metal but sodium is not.

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  11. Chromium is a typical hard metal, while mercury is a liquid, Explain.

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  12. The melting and boiling points of Zn, Cd and Hg are low. How will you ...

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  13. Why are the ionisation energies of 5d-metals greater than those of 3d-...

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  14. Explain why the paramagnetic character of the elements of first transi...

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  15. The 4d and 5d-series of transition metals have more frequent metal-met...

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  16. Explain why iron has higher melting point than copper.

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  17. In permanganate ion, there is a covalency between Mn and oxygen. How w...

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  18. Explain why electronic configurations of lanthanoids are not known wit...

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