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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

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Question 1

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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. ... show full transcript

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).

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