Question

which element forms two different stable chlorides.
a.calcium b. Sulphur c.phosphorus d.oxygen​

Answer 1

Since we know that the valency of lithium, sodium magnesium aluminium and calcium is 1,1,2,3 and 2 respectively. In this, there is three chlorine and we know that each chlorine required one electron to complete its shell. So, the required element is Aluminium.

Answer 2

Phosphorus forms two different stable chlorides.

• Calcium forms one stable chloride with chlorine which is calcium chloride.
• Sulfur has the same electronegativity as chlorine so does not have stable chloride.
• Oxygen has the same electronegativity as chlorine so does not have stable chloride.
• Phosphorus forms two stable chlorides with chlorine which are phosphorus trichloride and phosphorus pentachloride.