A Certain First-Order Reaction a → B Is 25% Complete

question 122

Multiple Choice

A certain first-order reaction A → B is 25% complete in 42 min at 25°C. What is the half-life of the reaction?

• A) 21 min
• B) 42 min
• C) 84 min
• D) 120 min
• E) 101 min

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Definitions:

Schizophrenia

An intense psychological condition marked by altered thought processes, perceptions, feelings, communication abilities, self-identity, and actions.

Positive Symptoms

In the context of psychology, these refer to an excess or distortion of normal functions, often observed in disorders like schizophrenia, including hallucinations or delusions.

Behavioural Symptoms

Observable actions or reactions of an individual that are often indicative of a psychological or physical disorder.

Neurodevelopmental Hypothesis

A theory suggesting that disorders like schizophrenia have their roots in abnormal brain development early in life.