Here students can locate TS Inter 1st Year Chemistry Notes 11th Lesson p-Block Elements: Group 14 to prepare for their exam.
TS Inter 1st Year Chemistry Notes 11th Lesson p-Block Elements: Group 14
→ Carbon, Silicon, Germanium, Tin and Lead are the five elements present in group 14 .
→ The general outer electronic configuration of elements of group IV A is ns2np2.
→ Carbon and Silicon are non-metals. Tin and Lead are metals.
→ Germanium is a metalloid.
→ The general oxidation states of group IV A elements are – 4, + 2, and +4.
→ The +4 state exhibited by lead is less stable due to inert pair effect’.
→ The property of self-linkage among the atoms of the same element to form long chains and rings is called catenation.
→ Existence of an element in two or more physical forms is called allotropy.
→ The crystalline allotropic forms of carbon are Diamond, Graphite and Fullerenes.
→ Silicon is the second most abundant element in earth’s crust.
→ Silicon carbide is called carborundum.
→ Silicon dioxide has a three-dimensional network structure.
→ Silicon dioxide is called silica. Pure silica is called Quartz.
→ A mixture of silicates of sodium and calcium is called glass.
→ CO is formed by the partial combustion of carbon in oxygen.
→ CO2 is formed by the complete combustion of carbon in oxygen.
→ Gases which burn and produce heat energy are called fuel gases.
→ A mixture of CO and N2 is called Producer gas.
→ A mixture of CO and H2 is called Water gas or Blue gas.
→ Semi water gas is a mixture of CO, N2 and H2.
→ Natural gas mainly contains methane, along with ethane and propane.