Step 1: Understanding the Redox Reaction
The balanced redox reaction in acidic medium: From the balanced equation:
- 1 mole of reacts with 6 moles of .
Step 2: Finding Moles of Given: Moles of : Step 3: Finding Moles of
From the reaction: Step 4: Finding Volume of Solution
Given that the molarity of solution is: Using the molarity formula: Final Answer: The correct volume is L, which matches Option (4).

Step 1: Understand Thermal Decomposition of Nitrates When metal nitrates decompose: For Group 2 (Be, Ca) and Li:
They decompose into basic metal oxides (e.g., CaO, BeO) and acidic oxides (NO ). For NaNO :
It decomposes into NaNO and O , not both acidic and basic oxides.
Step 2: Identify Correct Options
Ca(NO ) forms CaO (basic) and NO (acidic).
LiNO forms Li O (basic) and NO (acidic).
Thus, the correct answer is .

A redox reaction involves a change in oxidation states.

(i)
Oxidation state of Cl in KClO₃ is +5, and in KCl is -1.
Oxidation state of O in KClO₃ is -2, and in O₂ is 0.
This is a redox reaction.

(ii)
Oxidation state of O in H₂O₂ is -1, in H₂O is -2, and in O₂ is 0.
This is a redox reaction.

(iii)
Oxidation states: Ag(+1), N(+5), O(-2), K(+1), Cl(-1).
Oxidation states do not change.
This is not a redox reaction.

(iv)
Oxidation state of Na is 0, in Na₂O is +1.
Oxidation state of O is 0, in Na₂O is -2.
This is a redox reaction.

The redox reactions are (i), (ii), and (iv).
Thus, there are 3 redox reactions.