Question

Statement 1: The decreasing order of acidic character of $CO_{2}, N_{2}O_{5}, SiO_{2}$ and $SO_{3}$ is $SO_{3}>\,N_{2}O_{5}>\,CO_{2}>\,SiO_{2}$
Statement 2: Acidic character of oxides increases on moving top to bottom in a group and decreases on moving left to right in a period in Modem periodic table

• A. If both Statement $1$ and Statement $2$ are true and the statement $2$ is the correct explanation of the statement $1$
• B. If both Statement $1$ and Statement $2$ are true but Statement $2$ is not the correct explanation of the Statement $1$
• C. If Statement $1$ is true but Statement $2$ is false
• D. If Statement $1$ is false but Statement $2$ is true

Answer 1

Answer: (C)

Statement $1$ : It is correct statement. Across the period the nonmetallic character increases, therefore, the acidic character of oxides increases. On the other hand down, the group the metallic character increases, therefore, the acidic character of oxides decreases. Hence the correct order of acidic character is $SO_{3}>\,N_{2}O_{5}>\,CO_{2}>\,SiO_{2}$
S-$2$ : It is incorrect statement. Acidic character of oxides decreases on moving top to bottom in a group and increases on moving left to right in a period in Modem periodic table