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MCQs

Total Questions : 1678 | Page 4 of 168 pages
Question 31. −78 °C is the
  1.    melting point of carbon dioxide
  2.    boiling point of carbon dioxide
  3.    melting point of oxygen gas
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 32. Regular rows and shapes of a crystal is an indication of
  1.    matter capability to decompose
  2.    matter made up of particles
  3.    matters ability to evaporate
  4.    all of these
 Discuss Question
Answer: Option B. -> matter made up of particles
Answer: (b).matter made up of particles
Question 33. Presence of impurities cause
  1.    a fall in boiling point
  2.    a rise in melting point
  3.    a fall in condensation point
  4.    None of Above
 Discuss Question
Answer: Option D. -> None of Above
Answer: (d).None of Above
Question 34. "No fixed volume" is a characteristic of
  1.    liquids
  2.    solids
  3.    gases
  4.    aqueous solutions
 Discuss Question
Answer: Option C. -> gases
Answer: (c).gases
Question 35. In order to burn, a hydrocarbon needs a/an
  1.    aerobic environment
  2.    anaerobic environment
  3.    little CO₂
  4.    lot of CO₂
 Discuss Question
Answer: Option A. -> aerobic environment
Answer: (a).aerobic environment
Question 36. Alcohols are produced by passing alkenes through
  1.    steam
  2.    acid
  3.    base
  4.    alkali
 Discuss Question
Answer: Option A. -> steam
Answer: (a).steam
Question 37. If hydrogen and alkene are passed over finely divided nickel, it gives off
  1.    alcohol
  2.    alkanes
  3.    aldehydes
  4.    ketone
 Discuss Question
Answer: Option B. -> alkanes
Answer: (b).alkanes
Question 38. The double bond in ethene is formed from a
  1.    sigma-bond only
  2.    pi-bond only
  3.    lone pairs
  4.    sigma and pi-bonds
 Discuss Question
Answer: Option D. -> sigma and pi-bonds
Answer: (d).sigma and pi-bonds
Question 39. An estimated amount of 10,000 ethene monomers bond together to make polymer chain of
  1.    polyethene
  2.    polyvinyl chloride
  3.    polymers
  4.    monomers
 Discuss Question
Answer: Option A. -> polyethene
Answer: (a).polyethene
Question 40. After bubbling through concentrated solution of any hydrogen halide, the product obtained is
  1.    halogen
  2.    alkane
  3.    halogen alkane
  4.    halogen alkene
 Discuss Question
Answer: Option D. -> halogen alkene
Answer: (d).halogen alkene

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