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During a flame test why is calcium''s flame not persistent, while that of strontium is?
Ans) Because it does not have many ions as compared to the Strontium. It is the ions which produce color.
Urea or Carbamide - Carboxylic acids Urea may be referred like a diamide of an unstable and dibasic carbonic acid by which both the hydroxyl groups have been changed by -NH 2
Ionic compounds do not have: (1) Hard and brittle nature (2) High melting and boiling point (3) Directional properties (4) Soluble in polar solvents Ans: Direction
Explain and Define standard feat of formation Ans) The amount of heat liberated of absorbed when single mole of compound is formed in its standard state from its elements in the
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What is the effect of more electronegative atom on the strength of ionic bond: (1) Decreases (2) Increase (3) Decreases slowly (4) Remains the same Ans: Increase
The ionization energy of hydrogen atom is -13.6eV. The energy required to excite the electron in a hydrogen atom from the ground state to the first excited state is (Avogadro's co
Polymer Polymers are compound of extremely high molecular masses made by the combination of a large number of simple molecules. The simple molecules that combine to offer po
diagram of acetaldehyde
what is the magnetic behaviour of metal carbonyls
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