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 :
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 false but Statement-II is true.✓ Correct
- (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.
Answer: (A)
Solution
Elements at the extreme left of the periodic table are the alkali and alkaline earth metals. Being strongly electropositive, their oxides are ionic and basic, not acidic — , for instance, dissolves in water to give the base . Statement I, which claims these oxides are acidic, is false.
Moving across a period from left to right, non-metallic character rises, and oxides of the non-metals at the extreme right of a period (excluding noble gases) are covalent and acidic. A reactive non-metal there forms an oxide that reacts with water to give an acid, for example . Statement II is true.
Statement I is false, but Statement II is true.
Moving across a period from left to right, non-metallic character rises, and oxides of the non-metals at the extreme right of a period (excluding noble gases) are covalent and acidic. A reactive non-metal there forms an oxide that reacts with water to give an acid, for example . Statement II is true.
Statement I is false, but Statement II is true.
JEE Main · 2025 · 22 Jan 2025 · Shift 2 · Single correct option