Which of the following terms describes carbon tetrachloride? (cci4) a) mixture b) pure substance c) compound d) element

Answer : The correct option is, (C) compound  

Explanation :

Mixture : It is defined as the substance that is made by the combination of two or more different components.

Pure substance : It is defined as a substance that is made by the combination of only one type of atom or only one type of molecule.

Compound : It is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.

Element : It is a pure substance which is composed of atoms of similar elements.

The carbon tetrachloride is made from atoms of different elements (carbon and chlorine) combined together in a fixed ratio by mass.

Hence, the carbon tetrachloride is a compound.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).