The Question is from neet-chemistry classification-of-elements-and-periodicity-in-prop , and it was created by the author Mr. S M HUSSAIN

Question

Which of the following statements regarding the acidic strength of oxides of elements in the third period (Na to Cl) is INCORRECT?

Mr. S M HUSSAIN · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
 **Primary Concept**: Acidic and basic nature of oxides across a period.
 **Related Topics**: Electronegativity, oxidation states, periodic trends.
 **Prerequisites**: Understanding of electronegativity, oxidation states, and the relationship between these and the acidic/basic nature of oxides.
## SOLUTION PATHWAY
**Given Information**:
  Oxides of elements in the third period (Na to Cl).
  Four statements regarding their acidic strength.
**Method & Steps**:
 1. Analyze each statement individually to determine its correctness.
  Reasoning: The acidic strength of oxides generally increases with increasing electronegativity of the central atom.  However, the increase isn't always perfectly linear.
 2. Evaluate the trend of oxide properties across the period.
  Working: Across the third period, the oxides change from basic ($Na_2O$) to amphoteric ($Al_2O_3$) to acidic ($Cl_2O_7$).
  Key Point: The transition is due to the increasing electronegativity and the corresponding increase in the ability of the oxide to attract electrons and form acidic solutions.
 3. Identify the incorrect statement.
  Result: Statement A is incorrect because the increase in acidic strength with electronegativity is not perfectly linear. While there's a general trend, it's not a strictly linear relationship.
  Verification:  The other statements accurately reflect the trend of oxide properties across the period.
 ## OPTION ANALYSIS
A ✓: :x: The acidic strength increases with electronegativity, but not linearly. The relationship is more complex and influenced by factors beyond just electronegativity.  The increase is not perfectly proportional.
B :check_mark_button: Correct. The oxides exhibit a clear trend from basic to amphoteric to acidic across the period.
C :check_mark_button: Correct. $Cl_2O_7$ is the most electronegative oxide and thus the most acidic.
D :check_mark_button: Correct. $Na_2O$ is a strongly basic oxide.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Assuming a perfectly linear relationship between electronegativity and acidic strength.: Consider other factors influencing acidity.
  2.Overlooking the amphoteric nature of some oxides.: Remember that some oxides can act as both acids and bases.
 **Quick Tips**:
  1.Focus on the trend across the period, from left to right.
  2.Remember that electronegativity is a key factor, but not the sole determinant of acidic strength.

Mr. S M HUSSAIN · Answer

The correct Option is "The acidic strength increases linearly with increasing electronegativity of the element."

Mr. S M HUSSAIN · Answer

The oxides transition from basic to amphoteric to acidic across the period.

Mr. S M HUSSAIN · Answer

$Cl_2O_7$ is the strongest acidic oxide in the period.

Mr. S M HUSSAIN · Answer

$Na_2O$ is the strongest basic oxide in the period.

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