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Chemistry Test 260
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Chemistry Test 260
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  • Question 1/10
    4 / -1

    The correct order of their reactivity towards hydrolysis at room temperature is:

    Solutions

     

  • Question 2/10
    4 / -1

    Given below are two statements:

    Statement I: Potassium permanganate on heating at 573 K forms potassium manganate.

    Statement II: Both potassium permanganate and potassium manganate are tetrahedral and paramagnetic in nature.

    In the light of the above statements, choose the most appropriate answer from the options given below:

    Solutions

     

  • Question 3/10
    4 / -1

    Fe3+ cation gives a Prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of:

    Solutions

     

  • Question 4/10
    4 / -1

    In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?

    Solutions

    Cupric salts give green flame with blue centre.

    Colour of other salts:

    Sr2+ - Crimson red

    Ca2+ - Brick red

    Ba2+ - Green

     

  • Question 5/10
    4 / -1

    Given below are two statements:

    Statement I: The E° value of Ce4+/Ce3+ is +1.74 V.

    Statement II: Ce is more stable in Ce4+ state than Ce3+ state.

    In the light of the above statements, choose the most appropriate answer from the options given below:

    Solutions

    The E° value for Ce4+/Ce3+ is +1.74 V because the most stable oxidation state of lanthanide series elements is +3.

    It means that Ce3+ is more stable than Ce4+.

    So, option D is the correct answer.

     

  • Question 6/10
    4 / -1

    The reaction of H2O2 with potassium permanganate in acidic medium leads to the formation of mainly:

    Solutions

    The reaction of KMnO4 with H2O2 in acidic medium is as 2KMnO4 + 3H2SO4 + 5H2O2 → K2SO4 + 2MnSO4 + 8H2O + 5O

    ∴ Mn2+ will be formed as the product.

     

  • Question 7/10
    4 / -1

    Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature?

    (Given: Z for Nd = 60, Yb = 70, La = 57, Ce = 58)

    Solutions

    Yb (70) = 4f14 6s2

    Yb+2 = 4f14 6s0

    Ytterbium shows +2 oxidation state with diamagnetic nature.

     

  • Question 8/10
    4 / -1

    The functional groups that are responsible for the ion-exchange property of cation and anion exchange resins, respectively, are:

    Solutions

    Cation exchanger contains -SO3H or -COOH groups while anion exchanger contains basic group like -NH2.

    −COOH is also possible for cation exchangers

     

  • Question 9/10
    4 / -1

    Which one of the following is an example of artificial sweetener?

    Solutions

    Alitame is a second generation dipeptide sweetener, that is 200 times sweeter than sucrose.

     

  • Question 10/10
    4 / -1

    Which of the following is not an essential amino acid?

    Solutions

    Essential amino acids cannot be made by the body. The nine essential amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

    Tyrosine in not an essential amino acid.

    Tyrosine is non-essential, others are essential.

     

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