Questions asked by Shivangi Mangotra

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• Which model of an atom is correct?Bohr's or Erwin's
  
• If carbon has a versatile nature of combing with atoms of different elements then why it is present in such meagre amounts in the earths crust and atmosphere?
  
• Is carbon a diatomic element?
  
• Which scientist gave the modern periodic table?
  
• What is DNA replication?
  
• What are the three allotropes of carbon? Also explain their internal structures.
  
• Reflection is a phenomenon which occurs in opaque objects but reflection occurs in a droplet of water at the time of rainbow formation. Explain how?
  
• How reflection occurs in transparent mediums like water ?
  
• What was the Mendeleev's periodic law? Explain.
  
• Why Mendeleev used the formula of oxides and hydrides as one of the basis of classifying his periodic table?
  
• What are the isomers of butane?
  
• Why can't we add a methyl group to to the first carbon atom while making an isomer of butane?
  
• The biochemical processes like DNA Replication are never accurate. Then how the organisms which reproduce via asexual mode of reproduction have offsprings exactly identical to them without any variation?
  
• What is the difference between regeneration and fragmentation?
  
• Why an angle is made up of rays and not of lines or line segments?
  
• Why hydrogen bonds are formed?
  
• Why xenon being a noble gas forms compounds with other elements?
  
• Why carbon-12 is an isotope of carbon?
  
• What is difference between the gravitational force and the force of gravity?
  
• How is it possible that a catalyst without taking part in a chemical reaction increases the speed of the chemical reaction?
  
• What is Mayer's formula ?
  
• Why do we draw a normal between the reflected ray and the incident ray? What does a normal represents??