JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties

Given below are two statements :
Statement (I) : An element in the extreme left of the periodic table forms acidic oxides.
Statement (II) : Acid is formed during the reaction between water and oxide of a reactive element present in the extreme right of the periodic table.
In the light of the above statements, choose the correct answer from the options given below :

A Statement I is true but Statement II is false
B Both Statement I and Statement II are true
C Both Statement I and Statement II are false
D Statement I is false but Statement II is true

Verified Solution

Answer & Solution

Correct Answer

(D) Statement I is false but Statement II is true

Step-by-step Solution

Detailed explanation

Statement-I : False but Statement-II is true. On moving left to right in periodic table nonmetallic character increases and we know that nonmetal oxides are acidc in nature. Non metallic character \(\uparrow\) Acidic strength of oxide \(\uparrow\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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