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MCQs

Total Questions : 740 | Page 68 of 74 pages
Question 671. The melting point of Magnesium Oxide is higher than
  1.    2010 °C
  2.    2800 °C
  3.    2000 °C
  4.    2011 °C
 Discuss Question
Answer: Option B. -> 2800 °C
Answer: (b).2800 °C
Question 672. Farmers raise the pH of acidic soil by using
  1.    limestone
  2.    slake lime
  3.    pure lime
  4.    grey lime
 Discuss Question
Answer: Option B. -> slake lime
Answer: (b).slake lime
Question 673. Kilns and furnaces are lined by magnesium oxide because of its high
  1.    strength
  2.    melting point
  3.    boiling point
  4.    acidic nature
 Discuss Question
Answer: Option B. -> melting point
Answer: (b).melting point
Question 674. When calcium oxide is burned with clay its makes
  1.    cement
  2.    steel
  3.    calcium carbonate
  4.    bricks
 Discuss Question
Answer: Option A. -> cement
Answer: (a).cement
Question 675. Concrete sets when arranged with iron rods passes through it, improves it
  1.    strength
  2.    style
  3.    shape
  4.    texture
 Discuss Question
Answer: Option A. -> strength
Answer: (a).strength
Question 676. Each chlorine ion tends to destroy oz1 molecules in an amount
  1.    million
  2.    trillion
  3.    billion
  4.    zillion
 Discuss Question
Answer: Option A. -> million
Answer: (a).million
Question 677. Non-stick lining of a sauce pan is due to halogen-polymer named as
  1.    poly(ethene)
  2.    poly(tetrafluroethene)
  3.    Fluoro ethene
  4.    poly vinyl chloride
 Discuss Question
Answer: Option B. -> poly(tetrafluroethene)
Answer: (b).poly(tetrafluroethene)
Question 678. Teflon is the trade name for
  1.    non-stick pan
  2.    ice-skates
  3.    wheelers
  4.    glass bowl
 Discuss Question
Answer: Option A. -> non-stick pan
Answer: (a).non-stick pan
Question 679. Introducing a halogen atom into an alkene can greatly reduce its
  1.    polarity
  2.    volatility
  3.    flammability
  4.    reactivity
 Discuss Question
Answer: Option C. -> flammability
Answer: (c).flammability
Question 680. Chemically chlorofluorocarbons are
  1.    inert
  2.    reactive
  3.    versatile
  4.    instable
 Discuss Question
Answer: Option A. -> inert
Answer: (a).inert

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