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Chemistry Test 132

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Chemistry Test 132
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Weekly Quiz Competition
  • Question 1
    4 / -1

    LiNO3 on heating gives

    Solution

    Lithium nitrate when heated decomposes to give lithium oxide and nitrogen dioxide. The reaction is as follows :

    4LiNO₃ → 2Li₂O+ 4NO₂+ O₂

    LiNO₃ on heating, gives reddish brown fumes of NO₂

     

  • Question 2
    4 / -1

    Which of the following is an ore of potassium ?

    Solution

    Carnallite is an ore of potassium i.e., KCl.MgCl2.6H2O.

     

  • Question 3
    4 / -1

    Which of the following decomposes at highest temperature ?

    Solution

    BaCO3 decomposes at highest temp.

    All the carbonates decompose on heating to give CO2 and metal oxide.

    The stability of carbonate towards heat depends upon the stability of the resulting metal oxide. More is the stability of the resulting metal oxide lesser is the stability of the carbonate towards heat and vice versa.

     

  • Question 4
    4 / -1

    Nitrolim which is used as a fertilizer has the composition

    Solution

    Calcium cyanamide (CaCN2) mixed with carbon (C) is called nitrolim.

     

  • Question 5
    4 / -1

    The difference of water molecules in gypsum and plaster of paris is

    Solution

    Gypsum is CaSO4.2H2O and Plaster of Paris is CaSO4.1 / 2H2O. Difference in number of water molecules = 3 / 2 or 1 x 1 / 2 

     

  • Question 6
    4 / -1

    Which of the following does not contain fused benzene rings ?

    Solution

    In Diphenyl the two Benzene rings share a carbon -carbon bond but not the two carbon atoms.

     

  • Question 7
    4 / -1

    The IUPAC name of the compound,

    is

    Solution

    As the double bond has to be taken in main chain and also the carbon to with functional group has to be numbered first thus option A is the correct one.

     

  • Question 8
    4 / -1

    IPUAC name of the compound,

    Solution

    The IUPAC name of the given compound  is Ethyl-2-methyl-2-(3-nitrophenyl) propanoate,because the side chain contains the functional group , then the phenyl ring is considered as a substituent.

     

  • Question 9
    4 / -1

    The total number of structural isomers (acyclic and cyclic) possible for the molecular formula, C6H6 are

    Solution

    1 linear and 1 cyclic benzene ring.

     

  • Question 10
    4 / -1

    Which of the following does not show tautomerism ?

    Solution

    For an aldehyde or a ketone to exhibit tautomerism it is essential that it must have at least one α−Hα−H atom.

    So, C6H5COC(CH3)3

    Hence D is the correct answer.

     

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