THE D-AND F-BLOCK ELEMENTS Quiz-18

D and F block elements Quiz-18

Dear Readers,

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 O₇^2- are formed
•   Cr₂ O₇^2- and H₂ O are formed
•  CrO₄^2- 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 CrO₄^2- to Cr₂ O₇^2-
•  Acidic nature of CuSO₄ solution which converts CrO₄^2- to Cr₂ O₇^2-
• 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 HgI₄^2- 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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