JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank

done Critical Thinking Total Questions - 26

• question_answer1)
  Transition metal with low oxidation number will act as [DCE 2001]
  A)
  A base done clear
  B)
  An acid done clear
  C)
  An oxidising agent done clear
  D)
  None of these done clear
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• question_answer2)
  Which of the following pair will have effective magnetic moment equal
  A)
  \[C{{r}^{+3}}\] and \[M{{n}^{+2}}\] done clear
  B)
  \[C{{r}^{+2}}\] and \[F{{e}^{+2}}\] done clear
  C)
  \[{{V}^{+2}}\] and \[S{{c}^{+3}}\] done clear
  D)
  \[T{{i}^{+2}}\] and \[{{V}^{+2}}\] done clear
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• question_answer3)
  Which is least soluble in water [MNR 1984, 89]
  A)
  \[AgCl\] done clear
  B)
  \[AgBr\] done clear
  C)
  \[AgI\] done clear
  D)
  \[A{{g}_{2}}S\] done clear
  E)
  \[AgF\] done clear
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• question_answer4)
  Which one of the following has the maximum number of unpaired electrons [UPSEAT 2001]
  A)
  \[M{{g}^{2+}}\] done clear
  B)
  \[T{{i}^{3+}}\] done clear
  C)
  \[{{V}^{3+}}\] done clear
  D)
  \[F{{e}^{2+}}\] done clear
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• question_answer5)
  Which of the following ions form most stable complex compound [MP PMT 1995]
  A)
  \[C{{u}^{++}}\] done clear
  B)
  \[N{{i}^{++}}\] done clear
  C)
  \[F{{e}^{++}}\] done clear
  D)
  \[M{{n}^{++}}\] done clear
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• question_answer6)
  \[M{{n}^{++}}\] can be converted into \[M{{n}^{7+}}\] by reacting with [UPSEAT 2003]
  A)
  \[S{{O}_{2}}\] done clear
  B)
  \[C{{l}_{2}}\] done clear
  C)
  \[Pb{{O}_{2}}\] done clear
  D)
  \[SnC{{l}_{2}}\] done clear
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• question_answer7)
  General configuration of outermost and penultimate shell is \[(n-1)\,{{s}^{2}}\,(n-1)\,\,{{p}^{6}}(n-1)\,\,{{d}^{x}}n{{s}^{2}}.\] If n = 4 and x = 5 then no. of proton in the nucleus will be   [MP PET 2003]
  A)
  > 25 done clear
  B)
  < 24 done clear
  C)
  25 done clear
  D)
  30 done clear
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• question_answer8)
  Which transition metal reduces steam to evolve hydrogen [MP PMT 2003; DCE 2002]
  A)
  Mg done clear
  B)
  Fe done clear
  C)
  Sc done clear
  D)
  Pt done clear
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• question_answer9)
  Chloride of which of the following element is coloured [MP PMT 1990]
  A)
  \[Ag\] done clear
  B)
  \[Hg\] done clear
  C)
  \[Zn\] done clear
  D)
  \[Co\] done clear
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• question_answer10)
  Arrange \[C{{e}^{+3}},L{{a}^{+3}},P{{m}^{+3}}\] and \[Y{{b}^{+3}}\] in increasing order of their ionic radii [AIEEE 2002]
  A)
  \[Y{{b}^{+3}}<P{{m}^{+3}}<C{{e}^{+3}}<L{{a}^{+3}}\] done clear
  B)
  \[C{{e}^{+3}}<Y{{b}^{+3}}<P{{m}^{+3}}<L{{a}^{+3}}\] done clear
  C)
  \[Y{{b}^{+3}}<P{{m}^{+3}}<L{{a}^{+3}}<C{{e}^{+3}}\] done clear
  D)
  \[P{{m}^{+3}}<L{{a}^{+3}}<C{{e}^{+3}}<Y{{b}^{+3}}\] done clear
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• question_answer11)
  \[KMn{{O}_{4}}\] reacts with ferrous sulphate according to the equation \[MnO_{4}^{-}+5F{{e}^{2+}}+8{{H}^{+}}\to M{{n}^{2+}}+5F{{e}^{3+}}+4{{H}_{2}}O\] Here \[10ml\] of \[0.1M\] \[KMn{{O}_{4}}\] is equivalent to [CPMT 1999]
  A)
  \[20ml\] of \[0.1M\] \[FeS{{O}_{4}}\] done clear
  B)
  \[30ml\] of \[0.1M\] \[FeS{{O}_{4}}\] done clear
  C)
  \[40ml\] of \[0.1M\] \[FeS{{O}_{4}}\] done clear
  D)
  \[50ml\] of \[0.1M\] \[FeS{{O}_{4}}\] done clear
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• question_answer12)
  Which of the following is/are soluble in ethanol [Roorkee Qualifying 1998]
  A)
  \[Hg{{F}_{2}}\] done clear
  B)
  \[HgC{{l}_{2}}\] done clear
  C)
  \[HgB{{r}_{2}}\] done clear
  D)
  \[Hg{{I}_{2}}\] done clear
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• question_answer13)
  Out of all the known elements, the percentage of transitional elements is approximately
  A)
  30% done clear
  B)
  50% done clear
  C)
  60% done clear
  D)
  75% done clear
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• question_answer14)
  Atomic number of Cr and Fe are 24 and 26 respectively. Which of the following is paramagnetic with the spin of electron [CBSE PMT 2002]
  A)
  \[{{[Cr{{(N{{H}_{3}})}_{6}}]}^{+3}}\] done clear
  B)
  \[[Fe{{(CO)}_{5}}]\] done clear
  C)
  \[{{[Fe{{(CN)}_{6}}]}^{-4}}\] done clear
  D)
  \[[Cr{{(CO)}_{6}}]\] done clear
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• question_answer15)
  Which of the following is not an element [DCE 2001]
  A)
  Graphite done clear
  B)
  Diamond done clear
  C)
  22-carat gold done clear
  D)
  Rhombic sulphur done clear
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• question_answer16)
  Which of the following is more paramagnetic [DCE 2001]
  A)
  \[F{{e}^{+2}}\] done clear
  B)
  \[F{{e}^{+3}}\] done clear
  C)
  \[C{{r}^{+3}}\] done clear
  D)
  \[M{{n}^{+3}}\] done clear
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• question_answer17)
  The number of d-electrons in \[F{{e}^{2+}}\](at no. of \[Fe=26\]) is not equal to that of the [MNR 1994]
  A)
  p - electrons in Ne (at. no. = 10) done clear
  B)
  s - electrons in \[Mg\] (at. no. = 12) done clear
  C)
  d - electrons in \[Fe\] done clear
  D)
  p - electrons in \[C{{l}^{-}}\] (at. no. of \[Cl=17\]) done clear
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• question_answer18)
  The basic character of the transition metal monoxides follows the order [CBSE PMT 2003]
  A)
  \[TiO>VO>CrO>FeO\] done clear
  B)
  \[VO>CrO>TiO>FeO\] done clear
  C)
  \[CrO>VO>FeO>TiO\] done clear
  D)
  \[TiO>FeO>VO>CrO\] (Atomic no. Ti = 22, V = 23, Cr = 24, Fe  = 26) done clear
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• question_answer19)
  Amongest following the lowest degree of paramagnetism per mole of the compound at 298 K will be shown by
  A)
  \[MnS{{O}_{4}}.4{{H}_{2}}O\] done clear
  B)
  \[CuS{{O}_{4}}.5{{H}_{2}}O\] done clear
  C)
  \[FeS{{O}_{4}}.6{{H}_{2}}O\] done clear
  D)
  \[FeS{{O}_{4}}.5{{H}_{2}}O\] done clear
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• question_answer20)
  In nitroprusside ion, the iron and \[NO\] exist as \[F{{e}^{II}}\] and \[N{{O}^{+}}\] rather than \[F{{e}^{III}}\] and \[NO\]. These forms can be differentiated by [IIT-JEE 1998]
  A)
  Estimating the concentration of iron done clear
  B)
  Measuring the concentration of \[C{{N}^{-}}\] done clear
  C)
  Measuring the solid state magnetic moment done clear
  D)
  Thermally decomposing the compound done clear
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• question_answer21)
  Among the following, the compound that is both paramagnetic and coloured is [IIT-JEE 1997]
  A)
  \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] done clear
  B)
  \[{{(N{{H}_{4}})}_{2}}(TiC{{l}_{6}})\] done clear
  C)
  \[VOS{{O}_{4}}\] done clear
  D)
  \[{{K}_{3}}\left[ Cu(C{{N}_{4}}) \right]\] done clear
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• question_answer22)
  The number of moles of \[KMn{{O}_{4}}\] that will be needed to react completely with one mole of ferrous oxalate \[Fe({{C}_{2}}{{O}_{4}})\] in acidic solution is [IIT-JEE 1997; KCET 1996]
  A)
  3/5 done clear
  B)
  2/5 done clear
  C)
  4/5 done clear
  D)
  1 done clear
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• question_answer23)
  In following reaction \[yMnO_{4}^{-}+x{{H}^{+}}+{{C}_{2}}O_{4}^{-}\to yM{{n}^{++}}+2C{{O}_{2}}+\frac{x}{2}{{H}_{2}}O\], x and y are [CPMT 1997]
  A)
  2 and 16 done clear
  B)
  16 and 2 done clear
  C)
  8 and 16 done clear
  D)
  5 and 2 done clear
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• question_answer24)
  Which of the following weighs less when weighed in magnetic field
  A)
  \[VC{{l}_{3}}\] done clear
  B)
  \[ScC{{l}_{3}}\] done clear
  C)
  \[TiC{{l}_{3}}\] done clear
  D)
  \[FeC{{l}_{3}}\] done clear
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• question_answer25)
  An elements is in \[{{M}^{3+}}\] form. Its electronic configuration is \[[Ar]3{{d}^{1}}\] the ion is [JIPMER 2002]
  A)
  \[T{{i}^{3+}}\] done clear
  B)
  \[T{{i}^{4+}}\] done clear
  C)
  \[C{{a}^{2+}}\] done clear
  D)
  \[S{{c}^{+}}\] done clear
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• question_answer26)
  The atomic number of vanadium (V), chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26 which one of these may be expected to have the highest second ionization enthalpy [AIEEE 2003]
  A)
  V done clear
  B)
  Cr done clear
  C)
  Mn done clear
  D)
  Fe done clear
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