Question

A substance has a melting point of 800ºc and a boiling point of 1465ºc. the substance is most likely

a. water.
b. hydrogen.
c. gold.
d. table salt.

Answer 1

its most likely Table salt

as water has a boiling point of 100 so it can't be

hydrogen has a very low boiling point below 0 so it can't be

gold has a very high melting point as its a metal and melting point higher that table salt

hope that helps

Answer 2

Answer : The correct option is, (d) Table salt.

Explanation :

The melting point and boiling point of given substances are :

Substance Melting point,
`^oC` Boiling point,
`^oC`

(a) Water 0 100

(b) Hydrogen -259 -253

(c) Gold 1064.43 2807

(d) Table salt 800 1465

From the given substances, table salt is an ionic compound which has high melting and boiling point while others (water and hydrogen) are covalent compounds. And the gold is also has high melting and boiling point but as the value given in the question matches with the table salt.

Therefore, the correct answer is table salt.