Question:

Identify the set of acidic oxides.

Updated On: Apr 4, 2024
  • Na2O,CaO,BaONa_2O, CaO, BaO
  • ZnO,PbO,BeOZnO,PbO,BeO
  • CO,NO,N2OCO, NO,N_2O
  • Mn2O7,CrO3,V2O5Mn_2 O_7, CrO_3, V_2O_5
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The Correct Option is D

Solution and Explanation

Acidic oxides →Mn2O7, CrO3, V2O5\rightarrow Mn _{2} O _{7}, \,CrO _{3},\, V _{2} O _{5}

(due to higher oxidation state of central metal) Basic oxide →Na2O,CaO,BaO\rightarrow Na _{2} O , CaO , BaO

(due to lower oxidation state of central metal) Alkaline and alkali metal oxide are always basic. Neutral oxides →CO,NO,N2O\rightarrow CO , NO , N _{2} O

Amphoteric oxides →ZnO,PbO,BeO\rightarrow ZnO , PbO , BeO (acidic as well as basic)
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Concepts Used:

Properties of D Block Elements

  • Multiple oxidation states- The oxidation states of d block elements show very few energy gaps; therefore, they exhibit many oxidation states. Also, the energy difference between s and d orbital is very less. Therefore both the electrons are involved in ionic and covalent bond formation, which ultimately leads to multiple oxidation states.
  • Formation of complex compounds- Ligands show a binding behavior and can form so many stable complexes with the help of transition metals. This property is mainly due to:
    • Availability of vacant d orbitals.
    • Comparatively small sizes of metals.
  • Hardness- Transition elements are tough and have high densities because of the presence of unpaired electrons.
  • Melting and boiling points- Melting and boiling points of transition are very high because of the presence of unpaired electrons and partially filled d orbitals. They form strong bonds and have high melting and boiling points.
  • Atomic radii- The atomic and ionic radius of the transition elements decreases as we move from Group 3 to group 6. However, it remains the same between group 7 and group 10, and from group 11 to group 12 increases.
  • Ionization enthalpy- The ionization enthalpies of the transition elements are generally on the greater side as compared to the S block elements