1.1 The temperature at which the solid and liquid phases of a substance are at equilibrium is known as …
A - NSC Technical Sciences - Question 1 - 2022 - Paper 2
Question 1
1.1 The temperature at which the solid and liquid phases of a substance are at equilibrium is known as …
A. vapour pressure.
B. boiling point.
C. melting point.
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Worked Solution & Example Answer:1.1 The temperature at which the solid and liquid phases of a substance are at equilibrium is known as …
A - NSC Technical Sciences - Question 1 - 2022 - Paper 2
Step 1
1.1 The temperature at which the solid and liquid phases of a substance are at equilibrium is known as …
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Answer
The temperature at which the solid and liquid phases of a substance are in equilibrium is defined as the melting point. This is the temperature at which a solid turns into a liquid.
Step 2
1.2 Consider the diagram of a p-n junction diode below: Which ONE of the combinations below correctly represents part 1 and part 2?
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Answer
For a p-n junction diode:
Part 1 is the p-type semiconductor, which has an abundance of holes (positive charge carriers).
Part 2 is the n-type semiconductor, which has a higher concentration of electrons (negative charge carriers).
Thus, the correct combination is B: p-type (1) and n-type (2).
Step 3
1.3 Which ONE of the following combinations is TRUE about the substance that is oxidised?
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Answer
Oxidation involves the loss of electrons and is accompanied by an increase in oxidation number. Therefore, the correct option is D: Loss (of electrons) increases (oxidation number).