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  • Question 1
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    One or More than One Options Correct Type

    This section contains 5 multiple type questions. Each question has 4 choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.?

    Q.

    The ore that is concentrated by froth floatation process is

     

  • Question 2
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    In froth floatation process the particles of the ore come on the froth because

     

  • Question 3
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    Purification of bauxite is called

     

  • Question 4
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    The common impurities found in bauxite are

     

  • Question 5
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    Which of the following chemicals are involved in froth floatation process?

     

  • Question 6
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    Comprehension Type

    This section contains a passage describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer out of the given 4 options (a), (b), (c) and (d).

    Passage

    Most of the ores available in nature contain large amount of impurities i.e. gangue. The pretreatment of ores, based on physical properties and without bringing out any major chemical change in the ore is called ore dressing or ore concentration.

    Q. Which of the following is related to ore concentration?

     

  • Question 7
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    Most of the ores available in nature contain large amount of impurities i.e. gangue. The pretreatment of ores, based on physical properties and without bringing out any major chemical change in the ore is called ore dressing or ore concentration.

    Q. 

    In the purification of bauxite by leaching, the chemicals employed in Baeyer ’s and Hall ’s process respectively are

     

  • Question 8
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    Matching List Type

    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 9
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    Match the Column I with Column II and mark the correct option from the codes given below.

     

  • Question 10
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    One Integer Value Correct Type

    This section contains 5 questions, when worked out will result in an integer value from 0 to 9 (both inclusive).

    Q.

    The number of ores concentrated by froth floatation process among cassiterite, galena, zinc blende, chromite, haematite, copper iron pyrites

     

  • Question 11
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    The number of ores concentrated by leaching or wet process among calamine, tinstone, bauxite, argentite, horn silver, galena, cinnabar, native gold

     

  • Question 12
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    In the leaching of Ag2 S with NaCN the equation is

    Ag2 S + 4NaCN →2Na[Ag(CN)2 ] + Na2 S. In this change in oxidation state of silver.

     

  • Question 13
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    Number of ores concentrated by Levigation (hydraulic washing) among pitche blende, tinstone, chromite, galena, copper pyrites, argentite.

     

  • Question 14
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    The number of magnetic substances among : tinstone, wolframite, chromite, magnetite, pyrolusite, rutile, magnesite, sphalerite

     

  • Question 15
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    Statement Type

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

    Q. 

    Statement I : Cresol and aniline are froth stabilisers.

    Statement II : Collectors enhance the non-wettability of the ore particles.

     

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