Consider the following statements Laughing gas (N2O) 1. finds use as a propellant for whipped ice-cream. 2. used as an anaesthetic. 3. used for the preparation of N3H. 4. used as fuel for rockets. Which of the above is/are correct? A. Only 1 B. Only 2 C. 1, 2 and 3 D. All of these

The correct answer is D. All of these.

Laughing gas, also known as nitrous oxide, is a chemical compound with the formula N2O. It is a colorless, odorless gas that is used in a variety of applications, including:

• Propellant for whipped ice cream: Laughing gas is used as a propellant in whipped cream dispensers because it is non-toxic and does not leave a residue.
• Anesthetic: Laughing gas is used as an anesthetic because it has a rapid onset and a short duration of action. It is often used in dentistry and for minor surgical procedures.
• Preparation of N3H: Laughing gas is used in the preparation of hydrazine, a chemical compound that is used as a rocket fuel and a propellant.
• Fuel for rockets: Laughing gas is used as a fuel for rockets because it is a non-toxic, non-flammable gas that has a high specific impulse.

Laughing gas is a safe and effective substance when used properly. However, it is important to note that it can be dangerous if it is inhaled in high concentrations.