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Why does a kitchen gas burner glow yellow when liquid comes in contact with it?
By
SureshGdvm
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If you have been in the kitchen when your mother boils some water or milk, you may notice the flame of the gas burner turns yellow when liquid comes in contact with the flame. Did you know that there is chemistry at work behind this? The story of sodium ions A natural gas flame is yellow because of burning sodium atoms or ions. Water consists of salt dissolved in it. Common salt is sodium chloride. This is why you may notice that water that falls on the burners grill and evaporates leaves a white residue left on it. This white residue is salt. At the same time the sodium ionizes releasing photons that give the yellow. You may have also seen this yellow emission of sodium atoms in sodium lamps, which produce yellow light due to this reason. Even the tail of the Hale-Bopp comet is yellow for the same reason. The colour of a flame The colour of a flame is also determined by the oxygen that is available to it. You may see that in your school chemistry lab the B...
We know DNA. But what is RNA?
By
SureshGdvm
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We have all heard of DNA. But what exactly is RNA? RNA is similar to DNA in many ways at the structural level however; the differences that are present make RNA chemistry very different than that of DNA. We know DNA. But what is RNA? Almost everyone has heard of DNA and knows the role it plays in heredity. But another extremely important nucleic acid in the cell is RNA. RNA or Ribonucleic acid is similar to DNA in many ways at the structural level. However there are certain differences that are present in RNA chemistry that make it very different than DNA. What is RNA? RNA serves many functions in a cell and is typically a linear polymer that consists of a sugar-phosphate backbone with nitrogenous bases projecting off the backbone. This structure is very similar to DNA. Both of these nucleic acids carry genetic information, which is based on the order of the bases that are present along the chain of the molecule. The presence of a single atomic change in the...
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