Question

NaCl has higher melting point as compared to nephthalane

Answer 1

Answer:

In the comparison of the two properties of naphthalene and sodium chloride that is melting point and solubility in water, I can summarize them as follows.

1. Sodium chloride has higher melting point than naphthalene.

this is because sodium chloride has electrostatic forces of attraction and thus this tends to hold the the sodium and chloride ions very strongly and thus responsible for the high melting point.

2. Sodium chloride is very soluble in water than naphthalene.

sodium chloride is polar hence soluble in water while naphthalene is non-polar.

Answer 2

NaCl has higher melting point as compared to naphthalene because NaCl is ionic compound and strong force of attraction exist between Na and Cl.

Explanation:

• Chemical formula of naphthalene is $C_{10}H_{8}$ and it is a covalent compound as it contains two different non-metals. And, it is known that in covalent compounds there exist weak intermolecular forces of attraction.

• Hence, naphthalene has lower melting point. On the other hand, sodium chloride (NaCl) is an ionic compound as it is formed by transfer of electrons from sodium to chlorine atom.

• As a result, strong force of attraction exists between it due to the presence of opposite charges on sodium and chlorine atom. As a result, high heat is required to break the bond between sodium and chlorine. Hence, NaCl has high melting point.

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