Hydrogen Peroxide

Let's analyze each statement to determine their truthfulness:

1. Statement I: Hydrogen peroxide can act as an oxidizing agent in both acidic and basic conditions.
   • Hydrogen peroxide ( ) is known to be an excellent oxidizing agent. It can function as an oxidizing agent in both acidic and basic environments. In acidic conditions, it converts into water ( ), releasing oxygen ( ). Meanwhile, in basic media, it can still behave as an oxidizing agent, often producing ions. Thus, statement I is true.
2. Statement II: Density of hydrogen peroxide at 298 K is lower than that of .
   • The density of hydrogen peroxide ( ) at 298 K is generally around 1.448 g/cm . Deuterium oxide ( , often referred to as heavy water) is denser than regular water, with a density of approximately 1.107 g/cm at the same temperature. Therefore, the density of is higher than that of . Statement II is false.

Thus, the correct answer is: Statement I is true but Statement II is false.

Solution:
Statement I: SbCl₅ is more covalent than SbCl₃
This statement is correct. According to Fajan's rules, higher oxidation states of the central atom lead to greater polarization of the anion, resulting in increased covalent character. Sb in SbCl₅ has a +5 oxidation state, while in SbCl₃, it has a +3 oxidation state. Therefore, SbCl₅ is more covalent than SbCl₃.

Statement II: The higher oxides of halogens also tend to be more stable than the lower ones.
This statement is also correct. Higher oxides of halogens are generally more stable due to the greater covalent character and stronger bonds formed. For example, Cl₂O₇ is more stable than Cl₂O.

Therefore, both Statement I and Statement II are correct.

Correct Answer: (1) Both statement I and Statement II are correct