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Chemistry Test 176

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Chemistry Test 176
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  • Question 1
    4 / -1

    The enthalpy changes for the following processes are listed below:

    Solution

     

  • Question 2
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    Solution

     

  • Question 3
    4 / -1

    Which substance serves as reducing agent in the following reaction?

    Solution

    The compound undergo oxidation itself and reduces others is known as reducing agent. In this reaction O. N. Of Ni changes from 0 to +2 and hence Ni acts as a reducing agent.

     

  • Question 4
    4 / -1

    True peroxide is

    Solution

     

  • Question 5
    4 / -1

    Which one of the following does not react with water even under red hot condition?

    Solution

    Ca, Sr, Ba and Ra decompose cold water readily with evolution of hydrogen. Mg decomposes boiling water but Be is not attacked by water even at high temperatures as its oxidation potential is lower than the other members.

     

  • Question 6
    4 / -1

    In silicon dioxide

    Solution

     

  • Question 7
    4 / -1

    In Kjeldahl’s method nitrogen present is estimated as

    Solution

     

  • Question 8
    4 / -1

    The main product of the reaction is

    Solution

     

  • Question 9
    4 / -1

    Sewage water is purified by

    Solution

    Sewage water is purified by micro-organisms.

     

  • Question 10
    4 / -1

    AB; crystallizes in a body centred cubic lattice with edge length ‘a’ equal to 387 pm. The distance between two oppositely charged ions in the lattice is

    Solution

     

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