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Why concentrated HNO3 acquires a yellow ...

Why concentrated `HNO_3` acquires a yellow colour on standing in sunlight ?

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RESONANCE ENGLISH-P BLOCK ELEMENTS-Exercise 1 part 1 subjective ques
  1. Why is red phosporus less reactive than white phosphorus?

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  2. NO(2) can not be dried by an alkali, why ?

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  3. Why concentrated HNO3 acquires a yellow colour on standing in sunlight...

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  4. Nitric acid acts as an oxidising agent while nitrous acid can act both...

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  5. What products are formed when H(3)PO(2) is heated at 415 K and at 435 ...

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  6. What happens when phosphoric acid is heated ?

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  7. Why does H3PO3 act as a reducing agent but H3PO4 does not?

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  8. What happens when white phosphorus is boiled with a strong solution of...

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  9. What happens when PCl(5) is heated?

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  10. Why does PCl(3) fume in moisture ?

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  11. Write the chemical reactions of P(4)O(6) with cold and hot water.

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  12. Mg3 N2 on reaction with water gives off NH3, but MgCl2 on reaction wit...

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  13. Write balanced equation for the following : Phosphorus is treated wi...

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  14. Compare the radii of two nuclei with mass number 27 and 8 respectively...

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  15. Compare the radii of two nuclei with mass number 8 and 125 respectivel...

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  16. Explain why the liquid oxygen sticks to the magnet pole but liquid nit...

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  17. Which allotropic form of sulphur is thermodynamically stable at room t...

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  18. On moving down the group forms H(2)S to H(2)Te acidic strength increas...

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  19. Hydrolysis of one mole of peroxodisulphuric acid produces

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  20. is sulphur S(2) is paramagnetic in nature and why ?

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