Question
When we go from left to right in a period,
A.
the basic nature of the oxides increases
B.
the basic nature of the oxides decreases
C.
there is no regular trend in the nature of oxides
D.
oxides of only last two groups are basic in nature
Answer :
the basic nature of the oxides decreases
Solution :
The basic nature of the oxides decreases from left to right in a period. e.g., in third period,
$$\mathop {N{a_2}O}\limits_{{\text{Strongly basic}}} > \mathop {MgO}\limits_{{\text{Basic}}} > \mathop {A{l_2}{O_3}}\limits_{{\text{Amphoteric}}} > $$ $$\mathop {Si{O_2}}\limits_{{\text{Weakly acidic}}} > \mathop {{P_4}{O_{10}}}\limits_{{\text{Acidic}}} > \mathop {S{O_2}}\limits_{{\text{Strongly}}\,\,{\text{acidic}}} $$ $$ > \mathop {C{l_2}{O_7}}\limits_{{\text{Strongly}}\,\,{\text{acidic}}} $$