Given below are two statements: Statement - I: Along the period, the chemical reactivity of the elements gradually increases from group 1 to group 18 . Statement - II: The nature of oxides formed by group 1 elements is basic while that of group 17 elements is acidic. In the light of the above statements, choose the most appropriate from the options given below:

Statement I is False but Statement II is true

Both Statement I and Statement II are False

Statement I is True But Statement II is False

Both Statement I and Statement II are True

Periodic Table and Periodicity PYQ — JEE Main 2024 · 30 Jan · Shift 2 · Q20 with Solution

View written solutionFree

Correct answer: A

Analyze Statement I

Statement I says: Along a period, the chemical reactivity of the elements gradually increases from group 1 to group 18.

This is not correct.
- In a period, metallic character decreases from left to right.
- For metals, reactivity generally decreases from left to right.
- For non-metals, reactivity generally increases from left to right up to group 17.
- Group 18 elements (noble gases) are generally least reactive.
So reactivity does not gradually increase continuously from group 1 to group 18.

Hence, Statement I is false.
Analyze Statement II

Statement II says: The nature of oxides formed by group 1 elements is basic while that of group 17 elements is acidic.

This is true.
- Group 1 elements are alkali metals and form strongly basic oxides such as: $\mathrm{Na_2O,\, K_2O}$
- Group 17 elements are halogens, and their oxides are generally acidic in nature, for example: $\mathrm{Cl_2O_7}$ which forms perchloric acid with water.
Hence, Statement II is true.
Evaluate options
- A: Statement I is False but Statement II is true ✅
- B: Both Statement I and Statement II are False ❌
- C: Statement I is True But Statement II is False ❌
- D: Both Statement I and Statement II are True ❌
Final Answer

The correct option is: $\boxed{\text{A}}$
Comparison with stored correct answer

Stored correct answer = A

My derived answer = A

So, the answer agrees with the stored correct answer.

View written solutionFree

Correct answer: A

Analyze Statement I

Statement I says: Along a period, the chemical reactivity of the elements gradually increases from group 1 to group 18.

This is not correct.
- In a period, metallic character decreases from left to right.
- For metals, reactivity generally decreases from left to right.
- For non-metals, reactivity generally increases from left to right up to group 17.
- Group 18 elements (noble gases) are generally least reactive.
So reactivity does not gradually increase continuously from group 1 to group 18.

Hence, Statement I is false.
Analyze Statement II

Statement II says: The nature of oxides formed by group 1 elements is basic while that of group 17 elements is acidic.

This is true.
- Group 1 elements are alkali metals and form strongly basic oxides such as: $\mathrm{Na_2O,\, K_2O}$
- Group 17 elements are halogens, and their oxides are generally acidic in nature, for example: $\mathrm{Cl_2O_7}$ which forms perchloric acid with water.
Hence, Statement II is true.
Evaluate options
- A: Statement I is False but Statement II is true ✅
- B: Both Statement I and Statement II are False ❌
- C: Statement I is True But Statement II is False ❌
- D: Both Statement I and Statement II are True ❌
Final Answer

The correct option is: $\boxed{\text{A}}$
Comparison with stored correct answer

Stored correct answer = A

My derived answer = A

So, the answer agrees with the stored correct answer.