Question

Which of the following does not have a fixed melting point/boiling point ?
(a) gold
(b) ethanol
(c) air
(d) oxygen

Answer 1

Answer:

Air does not have a fixed melting and boiling point.Option (b).

Explanation:

• The oxygen, gold, ethanol are single compounds or substances which are having certain fixed melting points and boiling points respectively.
• But the air is a combination of several gases which were having different values for each gas as boiling and melting points.
• The melting points for oxygen, ethanol, and gold are -218 degree centigrade, -114 degree centigrade, 1064 degree centigrade respectively.
• The boiling points for oxygen, ethanol, and gold are -189 degree  centigrade, 78-degree centigrade, 2700 degrees centigrade respectively.

Answer 2

Answer:

hey..

B..

i hope it's help uh..

air..