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D AND F BLOCK QUIZ-4

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. Which among the following is consumed by humans in the elemental form?
  •  Cu
  •  Pb
  •  Ag
  •   Hg
Solution
c

Q2.Anhydrous ferric chloride is prepared by
  •  Heating hydrated ferric chloride at a high temperature in a stream of air
  •   Heating metallic iron in a stream of dry chlorine gas
  •  Reaction of ferric oxide with HCl
  •  Reaction of metallic iron with HCl
Solution
b
Q3.  Select the correct relative stability
  •   
  •  
  •  
  •  
Solution
a


Q4. Which is wrongly matched?
  •  Duralumin –Al+Cu+Mg+Mn
  •  Alnico –Fe+Al+Ni+Cu
  •  German silver –Cu+Zn+Ni
  •   Monel metal –Cu+Zn+Sn
Solution
d

Q5.Which of the following is not correct?
  •  La(OH)3is less basic than Lu(OH)3
  •  In lanthanide series ionic radius of Ln^(3+) ion decreases
  •  La is actually an element of transition series rather lanthanide
  •  Atomic radius of Zr and Hf are same because of lanthanide contraction
Solution
 a
Q6. The atomic numbers of vanadium (V), chromium (Cr), manganese (Mn) and iron are respectively 23, 24, 25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?
  •  V
  •  Cr
  • Mn
  •  Fe
Solution
b


Q7.In context with the transition elements, which of the following statements is incorrect?
  •  In addition to the normal oxidation state, the zero oxidation state is also shown by these elements in complexes.
  •  In the highest oxidation state, the transition metal shows basic character and form cationic complexes
  •  In the highest oxidation state of the first five transition elements (Sc to Mn), all the 4s and 4d electrons are used for bonding.
  •  Once the d^5 configuration is exceeded, the tendency to involve all the 3d electrons in bonding decreases.
Solution
b
As oxidation state increases, electronegativity increases thus acidic characteristic increases not basic.
Q8.
  •  
  •  
  •  
  •  
Solution
b


Q9.The atomic size of cerium and promethium is quite close, due to
  •  They are in same period in Periodic Table
  •  Their electronic configuration is same
  •  f-electrons have poor shielding effect
  •   Nuclear charge is higher on cerium than promethium
Solution
c

Q10. Most common oxidation state of lanthanides is
  •  +2
  •  +3
  •  +4
  • +5
Solution
b

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