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D and F block elements Quiz-18

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IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies. Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..

Q1. Cl2 gas is obtained by various reactions but not by
  •  
  •  
  •  
  •  
Solution
b
Q2.Paramagnetism is given by the relation μ=2√(s(s+1)) magnetons where ‘s’ is the total spin. On this basis, the paramagnetism of Cu+ ion is
  •  3.88 magnetons
  •  2.83 magnetons
  •  1.41 magnetons
  •  Zero
Solution
d
Q3.  Which of the following is most stable among Cu+,Fe+,Fe2+ and Fe3+?
  •  Cu+
  •  Fe+
  •  Fe2+
  •  Fe3+
  • Solution
    a

    Q4. What would happen when as solution of potassium chromate is treated with an excess of dilute nitric acid?
    •  Cr3+ and Cr2 O72- are formed
    •   Cr2 O72- and H2 O are formed
    •  CrO42- is reduced to +3 state of Cr
    •  None of the above
    Solution
    b
    Q5.(NH4 )2Cr2O7 on heating gives a gas which is also given by
    •  Heating NH4 NO2
    •  Heating NH4NO3
    •  Mg3N2+H2 O
    •  Na(Comp.)+ H2O2
    Solution
    a
    Q6. When K2CrO4is added to CuSO4 soluble, there is formation of CuCrO4 as well as CuCr2 O7. Formation of CuCr2 O7 is due to
    •  Basic nature of CuSO4 solution which converts CrO42- to Cr2 O72-
    •  Acidic nature of CuSO4 solution which converts CrO42- to Cr2 O72-
    • CuSO4 has the typical property of converting CuCrO4 is formed to CuCr2 O7
    •  No CuCr2 O7 is formed
    Solution
    b
    Q7.Oxidation state of Fe in Fe3 O4 is
    •  3/2
  •  4/5
  •  5/4
  •  8/3
  • Solution
    d
    Q8.Maximum magnetic moment is shown by
    •  d5
    •  d6
    •  d7
    •  d8
    Solution
    a
    Q9.When KI (excess) is added to I. CuSO4 II. HgCl2 III. Pb(NO3 )2
    •  A white ppt of CuI in I, a orange ppt HgI2 in II and a yellow ppt PbI2 in III
    •  A white ppt of CuI in I, an orange ppt. dissolving to HgI42- in II, and a yellow ppt of PbI2 in III
    •  A white ppt of CuI, HgI2 and PbI2 in each case
    •  None of the above is correct
    Solution
    b
    Q10. Which ore contains both iron and copper?
    •  Cuprite
    •  Chalcocite
    •  Chalcopyrite
    • Malachite
    Solution
    c

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