How Soap perform cleansing action?
Soaps and detergents perform the cleaning action because the polar parts of their molecules are water soluble due to hydrogen-bonding and non-polar parts remain outside water.
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MOLECULAR FORMULA DEFINITION
A formula which tells the actual number of atoms present in a molecule of a substance is known as molecular formula. Examples: H2O2 and C6H12O6 are the molecular formulas of hydrogen peroxide and glucose respectively.
Sublimation
The direct conversion of solid into vapour without passing through liquid state by heating is called sublimation. Explanation: Sublimation is used to purify solid substances. – Iodine, ammonium chloride, naphthalene, anthracene, and benzoic acid can sublime. A substance to be sublimed is taken in a watch glass covered with an inverted funnel. The funnel is…
Structure of Sodium Chloride
Ionic crystals depend upon the structure and the size of their ions. In the structure of NaCl each Na+ ion is surrounded by six chloride ions. The following figure shows how these ions are arranged in the crystal lattice. It is clear that Na+ ion has ten electrons while Cl– has 18 electrons. The size…
What is Relative atomic mass definition?
“The mass of one atom of an element compared with the mass of one atom of carbon taken as 12 is called relative atomic mass of the element.” Explanation: The mass of one atom of magnesium is two times the mass of one atom of carbon, therefore relative atomic mass of magnesium would be 24….
Solvent extraction
The removal of a solute from its solution by the addition of a solvent in which the solute is more soluble but which itself is not soluble in solution is called solvent extraction. Ether Extraction: Many organic compounds are produced along with minor products in aqueous solution. Such compounds are shaken with ether taken in…
Molecular Solids
“The crystals consisting of molecules, which are held together through Vander Waals’ forces, are called molecular crystals.” Explanation: Since Van der Waals’ attractive forces are weaker, therefore, molecular crystals are soft and have low melting points and low lattice energies. These crystals are poor conductors of electricity. This is because electrons are bound to individual…
