Problem 122 - Advanced Problems in Organic Chemistry for Competitive Examinations

Question

Which of the following is used as an anaesthetic? (a) \(\mathrm{CO}_{2}\) (b) \(\mathrm{N}_{2} \mathrm{O}\) (c) \(\mathrm{CH}_{4}\) (d) \(\mathrm{N}_{2}\)

Step-by-Step Solution

Answer

(b) \(\mathrm{N}_{2} \mathrm{O}\) is used as an anaesthetic.

Step 1: Understanding Anaesthetics

Anaesthetics are substances used to induce insensitivity to pain. They are crucial in medical procedures to numb sensations temporarily.

Step 2: Evaluate the Options

We need to examine each option to identify which chemical compound is known to be used as an anaesthetic:- \((a) \mathrm{CO}_{2}\) is carbon dioxide, primarily involved in respiration and not as an anaesthetic.- \((b) \mathrm{N}_{2} \mathrm{O}\) is nitrous oxide, commonly known as 'laughing gas' and widely used as an anaesthetic in surgeries.- \((c) \mathrm{CH}_{4}\) is methane, a hydrocarbon gas used as fuel and not in anaesthesia.- \((d) \mathrm{N}_{2}\) is nitrogen, a major component of air, not used as an anaesthetic.

Step 3: Select the Correct Option

After evaluating each compound, it's clear that \((b) \mathrm{N}_{2} \mathrm{O}\) is the correct answer as it is the only compound among the given options that is used as an anaesthetic.

Key Concepts

Nitrous Oxide

Nitrous oxide, often called "laughing gas," is a chemical compound with the formula \( \mathrm{N}_{2} \mathrm{O} \). It is composed of two nitrogen atoms bonded to one oxygen atom. This colorless gas has significant applications in medicine, particularly for its anesthetic properties. It was first synthesized by Joseph Priestley in 1772. Later, in the early 19th century, its pain-relieving properties became widely recognized.

In medical settings, nitrous oxide is used to provide mild sedation and pain relief during procedures. It works by altering the normal function of the nervous system and suppressing pain sensations. When inhaled, nitrous oxide can produce a state of euphoria, which is why it is sometimes referred to as a "laughing gas."

Outside of the medical field, nitrous oxide has other applications:

• In the food industry, it is used as a propellant in whipped cream canisters.
• In motorsports, it enhances engine performance when injected into the engine, increasing both speed and power.

Chemical Compounds and Their Uses

Chemical compounds consist of two or more elements that are chemically bonded together. Each compound has unique properties and potential applications based on its molecular structure.

Chemical compounds can be utilized in various industries and daily life due to their specific characteristics:

• For fueling: Methane (\( \mathrm{CH}_{4} \)) is widely used as a natural gas fuel because of its energy efficiency and availability.
• In daily life: Carbon dioxide (\( \mathrm{CO}_{2} \)) is important for plants' photosynthesis processes and is used in carbonated beverages.
• In cryogenics: Liquid nitrogen (\( \mathrm{N}_{2} \)) plays a pivotal role in extreme cooling needs, as it boils at extremely low temperatures.

These examples show how the molecular composition of a compound determines its practical application.

Anaesthesia in Medical Procedures

Anaesthesia is a critical component of modern medical practice. It ensures that patients undergo surgical and diagnostic procedures without experiencing pain.
There are different types of anaesthesia designed for varying degrees of need:

• Local anaesthesia numbs a small, specific area of the body, allowing patients to remain conscious.
• Regional anaesthesia, such as epidurals, blocks pain in a larger region of the body, often used during childbirth.
• General anaesthesia induces a reversible state of unconsciousness, ensuring the patient does not feel pain throughout the procedure.

Anaesthetic agents, including nitrous oxide, are selected based on the type and duration of the medical procedure. For instance, nitrous oxide is often combined with other agents to balance its fast onset with longer-lasting anesthetics. These agents work by inhibiting nerve signals that transmit pain sensations, making complex surgeries feasible and comfortable for the patient.