During the cooling of the naphthalene why the boiling tube must be placed in a conical flask?
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to prevent the supercooling occur and allow the even cooling of the naphthalene.
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During the cooling of the naphthalene the boiling tube must be placed in a conical flask in order to prevent the super cooling occur and allow the even cooling of the naphthalene.
Explanation:
- When heated at 80 °C, naphthalene rapidly sublimes directly from a solid into a gas, eventually leaving nothing remaining in the crucible.
- On cool surfaces, the gaseous naphthalene will re-solidify to form needle-like crystals. Naphthalene is a combustible solid. It may also be transported in a “molten” or heated form.
- The vapor given off when Naphthalene is heated is flammable and a dangerous fire hazard. Use dry chemical, CO2, water spray or alcohol-resistant foam as extinguishing agents.
- Naphthalene is made from crude oil or coal tar. It is also produced when things burn, so naphthalene is found in cigarette smoke, car exhaust, and smoke from forest fires.
- It is used as an insecticide and pest repellent.
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