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Why is KMnO(4) solution used to clean su...

Why is `KMnO_(4)` solution used to clean surgical instruments ?

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`KMnO_(4)` has germicidal property
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Why is KMnO_(4) kept in dark coloured bottles ?

When KMnO_(4) solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because -

Why is the inside portion of the optical instruments like camera, telescope etc. made black?

The colour of KMnO_(4) is due to -

To calculate the rate of decomposition of H_(2)O_(2) in an aqueous solution , a certain volume of the aqueous solution of H_(2)O_(2) is pipetted out and titrated against KMnO_(4) solution at different interval of time . Intervals The observations are given below : {:(Time ("in min"),0,5,10,20),("Volume of "KMnO_(4)("inML"),46.2,37.1,29.8,19.6):} Show that the decomposition of H_(2)O_(2) in aqueous solution is a first order reaction and calculate its rate constant .

It is important to boil surgical instruments before using them in an operation . It is done

CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -EXERCISE (VERY SHORT ANSWER-TYPE QUESTIONS)
  1. What is Baeyer's reagent ? What is it used for ?

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  2. What is Lanthanide contraction?

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  3. Why is KMnO(4) solution used to clean surgical instruments ?

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  4. What happens when ammonium dichromate is heated ?

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  5. Given general electronic configuration of inner transition elements.

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  6. What are ferrous metals ?

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  7. Give an example of disproportionation reaction.

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  8. Name an ore each of Cr and Mn.

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  9. Why are Zn, Cd and Hg not included among transition elements ?

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  10. The magnetic moment of a metal is sqrt(15)BM. How many unpaired electr...

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  11. In case of transition elements of the first series (from Sc to Cu), wh...

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  12. Name the transition element that has the highest density.

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  13. Which among Fe^(2+) & Fe^(3+) salts have higher magnetic moment ?

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  14. Determine whether Ti^(4+) ion is diamagnetic or paramagnetic.

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  15. Why does V(2)O(5) act as a catalyst ?

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  16. Name the transition element which does not exhibit a variable oxidatio...

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  17. Why does cerium exhibit + 4 oxidation state ?

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  18. Why can't copper replace H(2) from an acid solution ?

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  19. Which is a stronger reducing agent among Cr^(2+) and Fe^(2+) ?

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  20. Why is d^(1) configuration of transition elements highly unstable ?

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