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p - Block Elements

chemistry 12th class cbse notes

Uses of inert gases

Helium is used: Gas cooled Nuclear reactors In filling balloons for meteorological observations. In the oxygen mixture of deep sea divers In inflating aeroplane...
chemistry 12th class cbse notes

Xenon-oxygen compounds

Xenon-oxygen compounds Xenon forms some important compounds with oxygen like XeO3, XeOF4 XeO2F2. Preparation of Xenon-oxygen compounds: Various xenon-oxygen compounds are prepared as follows: Partial Hydrolysis XeOF4 Partial Hydrolysis...
chemistry 12th class cbse notes

Xenon-fluorine compounds

Xenon-fluorine compounds Xenon forms three binary fluorides, XeF2, XeF4 and XeF6 . Preparation of Xenon-fluorine compounds: Properties of Xenon-fluorine compounds: XeF2 is linear, XeF4 is square planar and...
chemistry 12th class cbse notes

Group 18 elements- General Properties

Group 18 elements: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn) having the electronic configuration ns2 np6, are named...
chemistry 12th class cbse notes

Oxoacids of halogens

Fluorine due to its small size and high electronegativity forms only one oxoacid HOF (Hypofluorous acid). Other halogen forms several oxoacids as given in the...
chemistry 12th class cbse notes

Hydrogen Chloride (HCl)

Preparation of Hydrogen Chloride: It is prepared by heating sodium chloride with concentrated sulphuric acid. Properties of Hydrogen Chloride: HCl is a colourless gas with a...
chemistry 12th class cbse notes

Chlorine – Preparation, Properties and Uses

Preparation of Chlorine: Chlorine can be prepared by any of the following processes: Properties of Chlorine: It is a greenish yellow gas with pungent and suffocating...
chemistry 12th class cbse notes

Anomalous behavior of Fluorine

Fluorine is anomalous in many properties like, ionisation enthalpy, electronegativity, enthalpy of bond dissociation that are higher than expected from the regular trends among...
chemistry 12th class cbse notes

Group 17 Elements- General Properties

Fluorine, chlorine, bromine, iodine and astatine are members of Group 17. These are collectively known as the halogens (Greek halo means salt and genes...
chemistry 12th class cbse notes

Sulphur – Types, Preparation, Properties and Uses

Sulphur (S) Sulphur exhibits allotropy, two important allotropes of which are: Yellow Rhombic (α - sulphur) Monoclinic (β- sulphur) At 369 K both forms are stable....