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NH(4)CI is used to clean metal surface b...

`NH_(4)CI` is used to clean metal surface because

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The clean surface of the adsorbent provides more area for adsorption. Therefore, exent of adsorption increases.
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The electrolytic reduction process is used for alkali metals, because:-

Washing soap is used for cleaning the clothes , because

P_4 O_(10) is not used to dry NH_3 gas because

Knowledge Check

  • The electrolytic reduction process is used for alkali metals, because:-

    A
    They are strong reducing agent
    B
    They are weak reducing agent
    C
    The are good oxidising agent
    D
    They are available in solid form

  • Washing soap is used for cleaning the clothes , because

    A
    it absorbs dirt
    B
    it increases the surface tension of the solution
    C
    it reduces the surface tension of the solution
    D
    it increases the viscosity of the liquid

  • P_4 O_(10) is not used to dry NH_3 gas because

    A
    `P_(4)O_(10)` reacts with moisture in `NH_(3)`
    B
    `P_(4)O_(10)` is not a drying agent
    C
    `P_(4)O_(10)` is acidic and `NH_(3)` is basic
    D
    `P_(4)O_(10)` is basic and `NH_3` is acidic
    • DINESH PUBLICATION-SURFACE CHEMISTRY -SHORT ASNWER TYPE QUESTIONS
    1. NH(4)CI is used to clean metal surface because

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    2. In the case of chemisorption, why adsorption first increases and then ...

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    3. Colloidal particles of soap sol in water are

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    4. What happens when gelatin is mixed with gold sol ?

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    5. How does it become possible to cause artificial rain by spaying silver...

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    6. Gelatin which is a pwptide is added in ice cream. What can be its role...

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    7. What is collodion ?

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    8. Why do we add alum to purify water ?

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    9. What happens when aeledtric field is applied to colloidal solution ?

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    10. What causes Brownian motion in colloidal despersion ?

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    11. How do emulsifiers stabilise emulsion ? Name two emulsifiers.

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    12. Why are some medicines more effective in the colloidal form ?

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    13. Why does leather get hardened after tanning ?

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    14. Cottrell precipitator acts on which of the following principles ?

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    15. How will you distiguish between dispersed phase and dispersion medium ...

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    16. Hardy-schulze rule sates that :-

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    17. It is difficult to stop bleeding from a cut in human body at high alti...

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    18. Why is Fe(OH)(3) colloid positively charged when prepared by adding Fe...

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    19. Why do physisorption and chemisorption behave differently with rise in...

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    20. What happens when dialysis is prolonged ?

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