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JEE Advanced Chemistry Test 2
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JEE Advanced Chemistry Test 2
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  • Question 1/2
    4 / -1

    Polyphosphates are used as water softening agent because they -

    Solutions

    Complex salt of metaphosphoric acid, sodium poly meta phosphate (NaPO3)n is known as calgon, where n sometimes as large as 1000 

    2Ca2+ + Na2 [Na4(PO3)6] →Na2[Ca2 (PO3)6] + 4 Na+ 

    2Mg2+ + Na2 [Na4 (PO3)6] →Na2[Mg2 (PO3)6] + 4 Na+ 

    Polyphosphates are used because they form soluble complex with anionic species.

     

  • Question 2/2
    4 / -1

    Match the catalyst in column X with their use in column Y. 

    Column X 

    (a) TiCl3 

    (b) FeSO4/H2O2 

    (c) Xanthine oxidase (Mo) 

    (d) Ferredoxin 

    (e) PdCl2 

    Column Y 

    I. Fenton's reagents for oxidizing R- OH to RCHO 

    II. Wacker process for converting C2H4 to CH3CHO 

    III. Photosynthesis 

    IV. Ziegler - Natta catalyst in production of polythene 

    V. Metabolism of purines

    Solutions

    (a) TiCl4 is the Ziegler-Natta catalyst in production of polyethylene 

    (b) FeSO4/H2O2 is the Fenton's regent for oxidising ROH to RCHO. 

    (c) Xanthine oxidase (Mo) – Metabolism of purines 

    (d) Ferredoxin – photosynthesis 

    (e) PdCl2 – Wacker process for converting C2H4 to CH3CHO.

     

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