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Transition Element Quiz-20

Dear Readers,

The one subject in NEET which is candidates who can easily attain good marks is Chemistry. That's the reason, often, one doesn’t pay notice and choose to compromise it. But if one wants to rank above others, the tip is to be thorough with NEET chemistry concepts. The understanding of reactions and definite basic understanding is what requires major attention in Chemistry but once done it only gets simpler from there. The main focus on the to-do list should be on getting a hang of the NCERT syllabus of NEET chemistry. .

Q1.  Ferrous ion changes to X ion, on reacting with acidified hydrogen peroxide. The number of d-electrons present in X and its magnetic moment (in BM) are, respectively
  •   6 and 6.93
  •   5 and 5.92
  •   5 and 4.9
  •   4 and 5.92
Solution

Q2.  The substance that sublimes on heating is:
  •   MgCl2
  •   AgCl
  •   HgCl2
  •   NaCl
Solution
Corrosive sublimate is HgCl2 because it has corrosion nature and sublimation nature.

Q3.  In the extraction of copper, the metal formed in the Bessemer’s converter is due to the reaction:
  •   Cu2S⟶2Cu+S
  •   2Cu2O⟶4Cu+O2
  •   2Cu2S+3O_2⟶2Cu2O+2SO2
  •   2Cu2O+Cu2S⟶6Cu+SO2
Solution
The process is called auto reduction.

Q4.  Correct formula of calomel is
  •   HgCl2
  •   HgCl2.H2O
  •   Hg2Cl2
  •   HgSO4
Solution


Q5. Schweitzer’s reagent used for dissolving cellulose in the manufacture of artificial silk is:
  •   CuSO4.5H2O
  •   CuI
  •   Cu(NH3)4SO4
  •   Cu(CH3COO)2.Cu(OH)2
Solution
  It is a use of this reagent.

Q6.  When MnO2is fused with KOH, a coloured compound formed, the product and its colour is
  •   K2MnO4,purple colour
  •   KMnO4,purple
  • Mn2O3,brown
  •   Mn3O4,black
Solution
2MnO2+4KOH+O2⟶2K2MnO4+2H2O
                  purple colour


Q7. In the case of d-block elements:
  •   Outermost and penultimate shells are incomplete
  •   Both penultimate and prepenultimate shells are incomplete
  •   Outermost shell is incomplete
  •   Innermost shell is incomplete
Solution
Transition elements have (n-1)d and ns-shell incomplete.

Q8. Which of the following ions form most stable complex compound?
  •   Mn2+
  •   Ni2+
  •   Fe2+
  •   Cu2+
Solution
The magnitude of stability constants for some divalent metal ions of the first transition series with oxygen or nitrogen donor ligands increases in the order



Q9. Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in presence of:
  •   Nitrogen
  •   Oxygen
  •   CO2
  •   Ar
Solution
4Ag+8NaCN+2H2O+O2⟶4Na[Ag(CN)2]+4NaOH

Q10.  The transition elements are more metallic than the representative elements because they have
  •   Electron pairs in d-orbitals
  •   Availability of d-orbitals for bonding
  •   The electron in d-orbitals
  •   Unpaired electron in metallic orbitals
Solution
Transition elements are more metallic than representative elements due to the availability of d-orbitals for bonding

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Transition Element Quiz-20
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