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The P-Block Quiz-3

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. “Chlorine-type” laundry bleaches are in reality aqueous solution of

  •  HOCl
  •  HClO3
  •  NaClO3
  •  NaOCl
Solution
(a) HOCl

Q2. Basic character of fluorides increases in the order

  •  XeF6 < XeF4 < XeF2
  •  XeF2 < XeF4 < XeF6
  •  XeF2 = XeF4 < XeF6
  •  XeF2 > XeF4 < XeF6
Solution 
(a) XeF6 < XeF4 < XeF2

Q3   S - S bond is present in

 

  • α-(SO3)n
  •  Î³-(S3O9)
  •  H2S2O3
  •  H2S2O8
Solution
(c)H2S2O3

Q4. 
An experiment involving absorption of oxygen and its quantitative estimation would involve use of


  • Caustic Soda
  •  Pyrogallol
  •  Conc sulphuric acid
  •  Turpentine Oil

  • Solution
    (b) Pyrogallol
    Pyrogallol dissolves O2



    Q5. Which is/are true statement(s)?
    •  Basic nature of X-is in order F-Cl-Br-I-
    •  HI is strongest acid of HF,HCl,HBr and HI
    •  The ionic character of M-X bond decreases in the order M-F > M-Cl > M-Br > M-I
    •  All the above are correct statements
    Solution
    (d)All the above are correct statements



    Q6. Ozone layer is being depleted. This is due to
    • No emission from supersonic jets
    • Chlorofluorocarbon used as aerosols
    • Both (a) and (b)
    • None of the above
    Solution
    (c)Both (a) and (b)


    Q7. The thermal stability of hydrides of oxygen family is in order
    •  H2Po < H2Te  < H2Se  < H2S  < H2O
    •   H2Po < H2O < H2Te  < H2Se  < H2S
    •   H2S < H2O  < H2Te  < H2Se  < H2Po
    •   H2O < H2S  < H2Te  < H2Se  < H2Po
    Solution
    (a) H2Po < H2Te  < H2Se  < H2S  < H2O
        

    Q8. Consider the following compounds 
    I. Na2S2O3    II. Na2S4O6   III. CaOCl2 
    Among these compounds identify those that have different oxidation states for same type of atoms

     

    •  I and III
    •  I 
    •  I and II
    •  I , II and III
    Solution
    (d) I , II and III



    Q9. The term ‘thio’ is used in the names of all of the following compounds except
    •  Na2S2O3 
    •  NaCS3
    •  NaSCN
    •  Na2SO3
    Solution
    (d)Na2SO3


    Q10. Most abundant noble gas in air is
    •  He
    •  Ne
    •  Rn
    •  Ar
    Solution
    (a) He



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