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Chemistry problems

  • 1. The number of waves in n x 10th Bohr's orbit are

  • Options
  • A. n2
  • B. n
  • C. n-2
  • D. n3
    • Discuss
  • 2. The luster of a metal is due to

  • Options
  • A. its high density
  • B. its high polishing
  • C. its chemical inertness
  • D. presence of free electrons
    • Discuss
  • 3. The hottest part of the gas flame is known as

  • Options
  • A. luminous zone
  • B. dark zone
  • C. blue zone
  • D. non-luminous zone
    • Discuss
  • 4. The high reactivity of fluorine is due to

  • Options
  • A. its high electro negativity
  • B. small size of fluorine atom
  • C. availability of d-orbitals
  • D. strong F - F bond
    • Discuss
  • 5. The hardest form of carbon is

  • Options
  • A. coke
  • B. graphite
  • C. diamond
  • D. charcoal
    • Discuss
  • 6. The main use of salt in the diet is to

  • Options
  • A. make the taste of food better
  • B. produce in small amounts the hydrochloric acid required for the digestion of food
  • C. ease the process of cooking
  • D. increase the solubility of food particles in water
    • Discuss
  • 7. The gas used in the manufacture of vanaspati from vegetable oil is

  • Options
  • A. hydrogen
  • B. oxygen
  • C. nitrogen
  • D. carbon dioxide
    • Discuss
  • 8. The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of

  • Options
  • A. atomic structure
  • B. metallurgy
  • C. periodic table of contents
  • D. discovery of elements
    • Discuss
  • 9. The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is

  • Options
  • A. cineole
  • B. engenol
  • C. geraniol
  • D. limonene
    • Discuss
  • 10. The maximum number of covalent formed by nitrogen is

  • Options
  • A. 1
  • B. 2
  • C. 3
  • D. 4
    • Discuss

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