Class 9 Exam > Class 9 Questions > Which of the following does not undergo subli...
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Which of the following does not undergo sublimation?
- a)Ammonium chloride
- b)Sodium chloride
- c)Solid carbon dioxide
- d)Iodine
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Which of the following does not undergo sublimation?a)Ammonium chlorid...
Sublimation is when a solid changes directly to gas without changing into liquid.
NaCl when heated does not change its state when heated , while all the other options sublime. Hence sodium chloride is the right answer.
NaCl when heated does not change its state when heated , while all the other options sublime. Hence sodium chloride is the right answer.
Most Upvoted Answer
Which of the following does not undergo sublimation?a)Ammonium chlorid...
Sublimation is the process in which a substance directly changes from solid to gas without passing through the liquid state. Not all substances undergo sublimation.
Explanation:
Substances that undergo sublimation have weak intermolecular forces of attraction and a low melting point. The energy required to overcome these forces of attraction is less than the energy required to convert the substance into a liquid state.
Among the options given, sodium chloride (NaCl) does not undergo sublimation. NaCl has a high melting point of 801 °C and strong ionic bonds between the sodium and chloride ions. The energy required to overcome these forces of attraction is too high, and hence NaCl directly converts from solid to liquid state upon heating.
On the other hand, the remaining options undergo sublimation:
a) Ammonium chloride (NH4Cl) has weak intermolecular forces of attraction and a low melting point of 338 °C. Hence, it undergoes sublimation.
c) Solid carbon dioxide (CO2) also undergoes sublimation. It has weak intermolecular forces of attraction and a low melting point of -78.5 °C.
d) Iodine (I2) has weak intermolecular forces of attraction and a low melting point of 113.7 °C. Hence, it undergoes sublimation.
Therefore, the correct answer is option B, sodium chloride, which does not undergo sublimation.
Explanation:
Substances that undergo sublimation have weak intermolecular forces of attraction and a low melting point. The energy required to overcome these forces of attraction is less than the energy required to convert the substance into a liquid state.
Among the options given, sodium chloride (NaCl) does not undergo sublimation. NaCl has a high melting point of 801 °C and strong ionic bonds between the sodium and chloride ions. The energy required to overcome these forces of attraction is too high, and hence NaCl directly converts from solid to liquid state upon heating.
On the other hand, the remaining options undergo sublimation:
a) Ammonium chloride (NH4Cl) has weak intermolecular forces of attraction and a low melting point of 338 °C. Hence, it undergoes sublimation.
c) Solid carbon dioxide (CO2) also undergoes sublimation. It has weak intermolecular forces of attraction and a low melting point of -78.5 °C.
d) Iodine (I2) has weak intermolecular forces of attraction and a low melting point of 113.7 °C. Hence, it undergoes sublimation.
Therefore, the correct answer is option B, sodium chloride, which does not undergo sublimation.
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Community Answer
Which of the following does not undergo sublimation?a)Ammonium chlorid...
Sublimation is when a solid changes directly to gas without changing into liquid.
NaCl when heated does not change its state when heated , while all the other options subline. Hence sodiun chloride is the right answer.
NaCl when heated does not change its state when heated , while all the other options subline. Hence sodiun chloride is the right answer.
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Which of the following does not undergo sublimation?a)Ammonium chlorideb)Sodium chloridec)Solid carbon dioxided)IodineCorrect answer is option 'B'. Can you explain this answer?
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