Question

which of the following is not compound? 1. carbon 2. potassium chloride 3. calcium chloride 4 . silica ​

Answer 1

To find:

Which of the following is not compound?

• Carbon
• Potassium chloride
• Calcium chloride
• Silica

Solution:

First of all , what is a COMPOUND ?

• Compound is a substance in which two or more atoms of different elements combine in a specific ratio.

• For example : 1 atoms of carbon and 2 atoms of oxygen combine to form carbon dioxide (CO2).

• Compound is different from "mixture" , because in mixture , elements don't mix in specific ratios.

• For example : sand-salt mixture.

Now, coming to the question:

• Carbon is just an element , so it is not a compound.

• Potassium chloride is a compound because it contains potassium and chloride in a specific ratio of 1 : 1 .(KCl)

• Calcium chloride is a compound because it contains calcium and chloride in a specific ratio of 1 : 2 .(CaCl2)

• Silica is also a compound because it contents silicon and oxygen in the specific ratio of 1 : 4 .(SiO4)

So, carbon is not a compound.

$\star$ Hope It Helps.