Question

Shashank carried out an experiment to find the melting and boiling points of naphthalene. He took a glass test tube, put some naphthalene balls in it and closed it tightly with a rubber stopper. He also fixed a thermometer through a tight opening in the stopper with its bulb dipped in naphthalene balls inside the test tube so that he could note the temperature whenever he wanted. He then started heating the test tube rapidly. He noted the temperatures at which the state of naphthalene changed from solid to liquid and from liquid to gas. This is what he observed. Which of the follwing satement is correct based on his observation?

The melting point of naphthalene is 25 degree celcius

The boiling point of naphthalene is 218 degree celcius

The melting point of naphthalene is 218 degree celcius

The boiling point of naphthalene is 81 degree celcius

Answer 1

Answer:

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