Final answer:
The salt produced in the neutralization reaction between nitric acid (HNO3) and potassium hydroxide (KOH) is potassium nitrate (KNO3).
Step-by-step explanation:
When nitric acid (HNO₃) and potassium hydroxide (KOH) undergo a neutralization reaction, they form water (H₂O) and a salt. The products of this reaction are potassium nitrate (KNO₃) and water. Therefore, the salt formed in the reaction between HNO₃ and KOH is potassium nitrate (KNO₃), which makes option 3 the correct answer. This is because in a neutralization reaction, the hydrogen ions (H+) from the acid react with the hydroxide ions (OH⁻) from the base to form water, and the remaining ions (in this case K+ from KOH and NO₃⁻ from HNO₃) form the salt.