Explanation

The equilibrium constant, Kc, for the reaction:

N2 + O2 ⇌ 2NO is unitless (No unit).

Since the number of moles of gas is the same on both the reactant and product sides (2 moles).

The concentration terms in the equilibrium constant expression cancel out, leaving Kc without units.

Explanation

Immunization is actually the process of becoming immune to a disease, typically through vaccination.

It is not an effect of misusing antibiotics.

Explanation

Hallucinogens are drugs that alter perception, thought, and mood, often causing:

• Blurred vision
• Hallucinations (seeing or hearing things that aren't there, like unseen faces)
• Altered mood, including euphoria

Explanation

Vaccination can be administered:

• Before infection (preventive vaccination, the most common scenario)
• After infection (post-exposure prophylaxis, PEP, to prevent severe symptoms or complications)
• During infection (in some cases, to reduce disease severity and transmission, like during an outbreak or pandemic)

Explanation

Sedatives are drugs that slow down normal brain functioning, leading to a calming or tranquilizing effect.

They can reduce anxiety, stress, and even induce sleep.

Examples of sedatives include benzodiazepines (e.g., Xanax, Valium), barbiturates, and certain antidepressants.