Which of the Following Observations Is/are Examples of Chemical Change $^{\circ}$

question 3

Multiple Choice

Which of the following observations is/are examples of chemical change?
1) Iron (Fe) rusts,forming Fe₂O₃.
2) The density of water increases when it changes from a solid to a liquid.
3) Sodium chloride melts at 801 $^{\circ}$ C.

• A) 1 only
• B) 2 only
• C) 3 only
• D) 1 and 2
• E) 2 and 3

Calculate profit or loss after considering all relevant financial activities.

Understand sequences and patterns to identify next elements in series.

Apply unit conversion in real-life contexts, such as time and distance.

Understand the role of different personality systems (Id, Ego, Superego) in influencing behavior.

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Definitions:

Ideal Self

A person's conception of how they would like to be, embodying their aspirations, goals, and standards of perfection.

External Locus of Control

A belief system where individuals attribute their successes or failures to external factors beyond their control.

Real Self

The authentic part of an individual's personality that reflects their genuine thoughts, feelings, and behaviors.

Ideal Self

A person's conception of how they would like to be, embodying their goals, aspirations, and moral ideals.