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  • Question 1
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    For which oxide formation ΔG °is more negative than Gr2 O3 ?

     

  • Question 2
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    In the extraction of iron from haematite in blast furnace reducing agent

     

  • Question 3
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    Based on the given information, (CaO) = -604.2 kJ/mol and (Al2 O3 ) = - 1582 kJ/mol, which o f the following is correct?

     

  • Question 4
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    Consider the Ellingham diagram given below. Which metal(s) in the diagram can be extracted at 1100 K using coke as a reducing agent?

     

  • Question 5
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    Comprehension Type

    Direction : This section contains a paragraph, describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).

    Passage

    Q. 

    To make the reduction ZnO+ C →Zn + CO spontaneous, temperature should be

     

  • Question 6
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    Passage

    Q. 

    At 1100 °C, which reaction is spontaneous to a maximum extent ?

     

  • Question 7
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    Matching List Type

    Direction : Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

    Q. 

    Match the Column I with Column II and mark the correct option from the codes given below.

     

  • Question 8
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    Match the Column I with Column II and mark the correct option from the codes given below.

     

  • Question 9
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    One Integer Value Correct Type

    Direction : This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).

    Q. 

    In the Gibbs equation at equilibrium the value of ΔG is

     

  • Question 10
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    The reaction 3CaO + 2AI →Al2 O3 + 3Ca is non-spontaneous. The number of electrons involved are

     

  • Question 11
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    The given reaction 2AI + Cr2 O3 →Al2 O3 + 2Cr is spontaneous. The number of electrons involved are

     

  • Question 12
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    Among PbO, ZnO, CaO, Al2 O3 , SnO2 , Cr2 O3 , WO3 , HgO the oxides reduced by carbon are

     

  • Question 13
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    Cu2+ + Fe →Cu + Fe2+ for this reaction to calculate ΔG °the formula ΔG °= - nFE °is used. Here, value of n is

     

  • Question 14
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    Statement Type

    Direction : This section is based on Statement I and Statement II. Select the correct answer from the codes given below.

    Q. 

    Statement I : Carbon is good reducing agent for sulphides.

    Statement II : Carbon is poor reducing agent for iron oxide.

     

  • Question 15
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    Statement I : Carbon can reduce Fe2 O3 to Fe at a temperature below 983 K. 

    Statement II : Iron has higher affinity toward oxygen than carbon.

     

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