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Question

Chemistry Question on properties of d block elements

Identify the set of acidic oxides.

A

Na2O,CaO,BaONa_2O, CaO, BaO

B

ZnO,PbO,BeOZnO,PbO,BeO

C

CO,NO,N2OCO, NO,N_2O

D

Mn2O7,CrO3,V2O5Mn_2 O_7, CrO_3, V_2O_5

Answer

Mn2O7,CrO3,V2O5Mn_2 O_7, CrO_3, V_2O_5

Explanation

Solution

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)