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Question: What is the difference between Bangladesh Standard Time and Greenwich Mean Time?

  1. a.
    6 hours
  2. b.
    8 hours
  3. c.
    10 hours
  4. d.
    5 hours
Answer: a

Question: Which among the following is a natural polymer?

  1. a.
    terylene
  2. b.
    polyester
  3. c.
    rubber
  4. d.
    plastic
  5. e.
    None
Answer: c

Question: Nitrogen constitutes nearly- % of the atmosphere.

  1. a.
    57
  2. b.
    42
  3. c.
    65
  4. d.
    79
  5. e.
    85
Answer: d

Question: While functioning what is the temperature level inside a refrigerator?

  1. a.
    350°
  2. b.
    500°
  3. c.
    400°
  4. d.
    450°
  5. e.
    300°
Answer: c

Question: Dry ice is--

  1. a.
    ice with salt added
  2. b.
    any frozen liquid
  3. c.
    solid carbon dioxide
  4. d.
    very cold ice
  5. e.
    none of these
Answer: c

Question: What are the main constituents of biogas?

  1. a.
    butane and carbon-dioxide
  2. b.
    methane and carbon-monoxide
  3. c.
    methane and carbon-dioxide
  4. d.
    ethylene and carbon-dioxide
  5. e.
    None of these
Answer: c

Question: Which of the following compounds are responsible for acid rain?

  1. a.
    nitrogen dioxide and carbon monoxide
  2. b.
    silicon dioxide and carbon monoxide
  3. c.
    nitrogen dioxide and silicon dioxide
  4. d.
    nitrogen dioxide and sulphur dioxide
  5. e.
    None of these
Answer: d

Question: Who discovered circulation of blood in human body?

  1. a.
    William Harvey
  2. b.
    Jonon Esals
  3. c.
    Edward Jenner
  4. d.
    Joseph Lister
  5. e.
    None of them
Answer: a

Question: Centigrade & Farenheit scales give same reading at--

  1. a.
    -273°
  2. b.
    -100°
  3. c.
    -40°
  4. d.
    -32°
  5. e.
    None of these
Answer: c

Question: The center of the earth is known as the--

  1. a.
    hydrosphere
  2. b.
    core
  3. c.
    crust
  4. d.
    atmosphere
  5. e.
    none
Answer: b

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