The “Royal Water” which can dissolve Gold and Platinum is made up of a mixture of

Asked in District Statistical Officer Assistant Director 2025 · Topic: Acid, Base and Salt (Reactions of Acids and Bases (Neutralization, reaction with metals, metal carbonates/bicarbonates))

1. 1 : 3 mixture of conc. HNO₃ and HCl
2. 3 : 1 mixture of conc. HNO₃ and HCl
3. 1 : 3 mixture of conc. H₂SO₄ and HCl
4. 3 : 1 : 1 mixture of HNO₃ ; HCl ; H₂SO₄

More Chemistry questions

• Which of the following acids can melt gold ?
• Which one of the following, when dissolved in water, produces a hissing sound?
• A solution reacts with crushed egg shell to give a gas that turns lime water milky. The solution contains :
• Which of the following statements are correct? 1. pH of the human body is slightly acidic. 2. During the indigestion the stomach produces too much acid, which causes pain and irritation. 3. Milk of magnesia can be used to get rid of the excessive acidity.
• Which of the following properties is true for a tooth paste ?
• A milkman adds a small amount of baking soda to milk. This makes the pH of the milk
• pH of blood is
• To protect tooth decay we are advised to brush our teeth regularly. The nature of the toothpaste commonly used is

All 1,619 Chemistry questions →