Property of Matter and their Classification
We are to use various materials in doing different work. We use of thousand of materials, starting with the water to wash our hands and face just after getting up from bed in the morning.…
Topics: Qualitative Chemistry
Why the Density of Ice is Lower than Water?
Each ice crystal may be considered as a giant molecule. In ice, each oxygen atom is linked to four hydrogen atoms- two of them by covalent bonds and two by hydrogen bond. The covalently bonded…
What is Van dar Waals Force?
The force of attraction among the molecules of non polar covalent compounds is known as Van der Waals force. Van der Waals force is very weak, much weaker than covalent bond and even weaker than…
What is Pi (π) Bond?
Pi (π) bond: When two orbitals of two atoms overlap sidewise to form a covalent bond, the resulting bond is known as π-bond. It is formed only after a sigma bond is formed. Pi (π)…
Explain Uses of Noble Gas
Uses of Noble Gas: (A) HELIUM Because of its lightness and non-inflammability helium is used to filling balloons for meteorological observations. Because of its lightness, it is used in inflating aeroplane tyres. The helium-oxygen mixture…
Separation of Noble Gases in Dewar’s Method
The individual noble gases can be separated by Dewar Charcoal adsorption method. The principle involved in Dewar’s method: Activated coconut charcoal adsorbs all the Noble gases excluding Helium. The adsorption depends on temperature. Lower the…
Explain Isolation of Noble Gases in Ramsay-Raleigh’s Method
The noble gases are isolated from air by removing oxygen and nitrogen from air free from carbon-di-oxide, water vapor, dust particles, etc. These are chemical elements that are not reactive. This can be accomplished by…
Define and Describe on Noble Gases or Inert Gases
Group 18 of the periodic table consists of helium, neon, argon, krypton, xenon and radon. All these are gases under ordinary conditions of temperature and pressure. All of them (except Rn) are present in the…
Laboratory Preparation of Xenon Fluoride Compounds
Xenon forms three binary Fluorides XeF2, XeF4, and XeF6 by the direct union of elements under appropriate experimental conditions. PROPERTIES: Xe F2, Xe F4 and Xe F6 are colourless crystalline solids subliming readily at 298K.…
Why Silver Fluoride is Soluble in Water but Silver Chloride not Soluble?
Ionic compounds are generally soluble in polar solvents like water, covalent compounds are not. So if the anion of any salt is very much polarized, a may have so much covalent character, that it may…
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