NEET
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- NEET
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- Chemistry
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- Some Basic Concepts of Chemistry
NEET · Chemistry · Some Basic Concepts of Chemistry
Question 1: Which of the following statements about the mole...
Question 1: Which of the following statements about the mole concept are true?
1. A mole of any substance contains exactly (6.022 \times 10^{23}) particles.
2. The molar mass of an element is numerically equal to its atomic mass in grams.
3. A mole of a gas at STP occupies 22.4 liters.
4. The mole is only used for measuring solids.
Options
- A1 and 2 only
- B1,2, and 3 only
- C2 and 4 only
- DAll of the above
Correct answer
B. 1,2, and 3 only
Step-by-step solution
Analysis of Each Statement:
1. True: A mole of any substance indeed contains exactly (6.022 \times 10^{23}) particles, known as Avogadro's number.
2. True: The molar mass of an element (in grams per mole) is numerically equal to its atomic mass (in atomic mass units) for that element.
3. True: At standard temperature and pressure (STP), one mole of any ideal gas occupies 22.4 liters.
4. False: The mole is not limited to measuring solids; it is also used for measuring liquids and gases.
Conclusion:
- Statements 1,2, and 3 are true.
- Statement 4 is false.
Correct Answer:
B) 1, 2, and 3 only