Self Studies
Self Studies
Self Studies
Self Studies

Isolation of Elements Test - 6

Result Self Studies

Isolation of Elements Test - 6
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    4 / -1

     

    Which one of the following is the major impurity in pig iron?

     

    Solution

     

    It is an impure form of iron cast into blacks (Pigs) obtained from iron over by blast furnace process.
    Graphite is the major impurity in pig iron. Pig-iron is later converted into cast iron or steel.

     

     

  • Question 2
    4 / -1

    In smelting the furnace most suitable is

    Solution

    Blast furnace is most suitable for smelting which is used for the manufacture of cast iron.

  • Question 3
    4 / -1

    Silver from argentiferous lead is obtained by

    Solution

    Cyanide process is used for gold and silver as follow

  • Question 4
    4 / -1

    Which of the following has lowest carbon content?

    Solution

    Wrought iron is an iron with a very low carbon (less than 0.08%) content in contrast to cast iron (2.1 to 4%). Stainless steel contain maximum of 0.15 % carbon. Chrome steel contains high carbon content.

  • Question 5
    4 / -1

    During the process of electrolytic refining of copper, some metals present as impurity settle as anode mud. These are

    Solution

    The impurities of more electropositive metais remain as ions in the bath whereas impurities of less electropositive metals (Ag and Au) remain unionised and settle down under the anode as anode mud or anode sludge.

  • Question 6
    4 / -1

    2CuCO3 . Cu(OH)2 is the formula of

    Solution

    Azurite is an copper Ore [2CuCO3​⋅Cu(OH)2​]

  • Question 7
    4 / -1

    The temperature of the slag zone in the metallurgy of iron using blast furnace is

    Solution

    Slag zone is the zone of blast furnace where flux and gangue mix to form slag.

  • Question 8
    4 / -1

    The Puddler’s candles are produced due to the burning of

    Solution

    In the conversion of cast iron into wrought iron, the carbon impurities present as Fe3C are oxidised and escapes as carbon monoxide.

  • Question 9
    4 / -1

    In the extraction of copper, the metal formed in the Bessemers convertor is due to the reaction

    Solution

    Cuprous sulphide (Cu2S) and cuprous oxide (Cu2O) react with each other to form copper metal along with evolution of SO2 gas.

  • Question 10
    4 / -1

    Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of

    Solution

    Ag2S + 4NaCN + 2O2 →2Na[Ag(CN)2] + Na2SO4

  • Question 11
    4 / -1

     

    Froth flotation process is based on

     

    Solution

     

    This method is based upon the fact that the surface of sulphide over is preferentially wetted by oils while that of gangue is preferentially wetted by water.

     

  • Question 12
    4 / -1

    Annealing improves

    Solution

    The correct answer is option D.

    Annealing is a heat treatment process which alters the microstructure of a material to change its mechanical and electrical properties. Typically, in steels, annealing is used to reduce hardness, increase ductility and help eliminate internal stresses. With continued time at the annealing temperature, some of the newly formed grains grow at the expense of neighboring grains.  There is some further decrease in strength and increase in ductility as the average grain size increases during the grain growth phase of the annealing process.

  • Question 13
    4 / -1

     

    Which of the ore dressing process requires finest size of ore?

     

    Solution

     

    The ore is crushed into a fine powder and mixed with water to form suspension.

     

  • Question 14
    4 / -1

     

    Gravity method of ore concentration depends on

     

    Solution

     

    The mineral particle becom es wet by oils while the gangue particles by water. A rotating paddle agitates the mixtures and draws air in it. As a result froth is formed which carrier the mineral particles. The froth is light and is skimmed of. If is then dried for recovery of the ore particles.

  • Question 15
    4 / -1

     

    Sulphide ores of metals are usually concentrated by froth floatation process.Which one of the following sulphide ores offers an exception and  is concentrated by leaching?

     

    Solution

     

    Leaching This process consists in treating the powdered ore with a suitable reagent (such as acids, bases or other chemicals) which can selectively dissolves the ore but not the impuritier. It is used to extract silver metals.

     

  • Question 16
    4 / -1

    Comprehension Type

    Direction (Q. Nos. 16-17) 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

    Steel is the most important commercial variety of iron. The % of carbon in this form of iron is midway between that of cast iron and wrought iron i.e. 0.25 to 2 %.
    There are many varieties of steel depending on the amount of carbon present in it such as mildj^teels, hard steels and special steels. Steel mixed with small amount of Ni, Co, Cr, W, Mo, Mn etc., acquire special properties. Such products are called alloy steels.

    Q. 

    Which of the following is used to make permanent magnets?

    Solution

    Alnico is Fe, Al, Ni, Co.

  • Question 17
    4 / -1

    Passage

    Steel is the most important commercial variety of iron. The % of carbon in this form of iron is midway between that of cast iron and wrought iron i.e. 0.25 to 2 %.
    There are many varieties of steel depending on the amount of carbon present in it such as mild steels, hard steels and special steels. Steel mixed with small amount of Ni, Co, Cr, W, Mo, Mn etc., acquire special properties. Such products are called alloy steels.

    Q. 

    Steel used in making pendulums, measuring tapes

    Solution

    Invar steel is Fe and Ni.

  • Question 18
    4 / -1

    Matching List Type

    Direction (Q. No. 18 and 19) 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 code.

    Solution

    (i) → (q), (ii) → (p), (iii) → (s), (iv) → (p)

  • Question 19
    4 / -1

    Match the Column I with Column II and mark the correct option code.

    Solution

    (i) → (r,s), (ii) → (p), (iii) → (r), (iv) → (t)

  • Question 20
    4 / -1

     

    Direction (Q. No. 20-24) This section contains 5 questions. When worked out will result is an integer from 0 to 9 (both inclusive).

    Q. 

    The percentage of copper in duralumin is

     

    Solution

     

    Duralumin is an alloy having Al (95%), Cu(4%) and Mg (1%).

     

  • Question 21
    4 / -1

     

    The percentage of silver in German silver is

     

    Solution

     

    German silver is the alloy of CU+ Zn + Ni.

     

  • Question 22
    4 / -1

     

    Mohr’s salt is a double salt with the formula FeSO4(NH4)2SO4xH2O. Here, value of x is

     

    Solution

     

    Mohr’s salt formula FeSO4(NH4)2SO4 . 6H2O.

     

  • Question 23
    4 / -1

     

    Number of unpaired electrons in the complex [Ag(CN)2]- are

     

    Solution

     

    [Ag(CN)2]- complex having configuration of central atom (Ag) as [Kr]4d10 have zero unpaired electron.

     

  • Question 24
    4 / -1

     

    The number of silver containing compounds among Nessler’s reagent, Tollen’s reagent, Baeyer’s reagent, Corrosive sublimate, Horn silver, Ruby silver, Calomel.

     

    Solution

     

    Nessler’s reagent (K2[HgI4]), Tollen's reagent [Ag(NH3)2]+ , Baeyer's reagent AIk. KMnO4, Corrosive sublimate (HgCI2), Horn silver (AgCI), Ruby silver (3Ag2SSb2S3), Calomel (Hg2CI2).

     

  • Question 25
    4 / -1

     

    Statement Type

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

    Q. 

    Statement I : Silver is obtained from its cyanide complex during leaching.

    Statement II : Copper can be extracted by poling process when it contain Cu2O as impurities.

     

    Solution

     

    Statement II does not explains the statement correctly.

     

Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now