Practice Question and Answer

Q:

Which of the following methods is best suited for the separation of a mixture containing naphthalene and benzoic acid

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  • 1
    Crystallization
    Correct
    Wrong
  • 2
    Chromatography
    Correct
    Wrong
  • 3
    Sublimation
    Correct
    Wrong
  • 4
    Distillation
    Correct
    Wrong
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Answer : 3. "Sublimation"

Q:

A wire loop is rotated in a magnetic field such that the frequency of change of direction of the induced emf is

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  • 1
    Six times per revolution
    Correct
    Wrong
  • 2
    Four times per revolution
    Correct
    Wrong
  • 3
    Twice per revolution
    Correct
    Wrong
  • 4
    Once per revolution
    Correct
    Wrong
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Answer : 3. "Twice per revolution"

Q:

Consider an inductor whose linear dimensions are tripled and the total number of turns per unit length is kept constant, what happens to the self-inductance?

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  • 1
    9 times
    Correct
    Wrong
  • 2
    3 times
    Correct
    Wrong
  • 3
    27 times
    Correct
    Wrong
  • 4
    1/3 times
    Correct
    Wrong
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Answer : 2. "3 times "

Q:

What is the ratio of power dissipated if two electric bulbs are connected in series and the ratio of their resistance is 1:2?

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  • 1
    1:4
    Correct
    Wrong
  • 2
    1:2
    Correct
    Wrong
  • 3
    2:1
    Correct
    Wrong
  • 4
    1:1
    Correct
    Wrong
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Answer : 2. "1:2"

Q:

Consider copper and aluminum wire whose length and resistance are the same. Also, the specific resistance of aluminum is more than copper. Select the correct statement

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  • 1
    Copper and aluminum mass are the same
    Correct
    Wrong
  • 2
    Copper wire has more mass than the aluminum wire
    Correct
    Wrong
  • 3
    Copper wire has less mass than the aluminum wire
    Correct
    Wrong
  • 4
    The information given is incomplete
    Correct
    Wrong
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Answer : 4. "The information given is incomplete "

Q:

Which of the following consists of the exchange part of the respiratory system?

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  • 1
    From external nostrils up to the alveoli
    Correct
    Wrong
  • 2
    From external nostrils to terminal bronchioles
    Correct
    Wrong
  • 3
    From trachea to terminal bronchioles
    Correct
    Wrong
  • 4
    Alveoli and their ducts
    Correct
    Wrong
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Answer : 4. "Alveoli and their ducts "

Q:

Which of the following is not a major component of the food?

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  • 1
    Carbohydrates
    Correct
    Wrong
  • 2
    proteins
    Correct
    Wrong
  • 3
    Vitamins
    Correct
    Wrong
  • 4
    Fats
    Correct
    Wrong
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Answer : 3. "Vitamins"

Q:

K in K = Cα2/1 – ɑ represents ___________

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  • 1
    Dissociation constant
    Correct
    Wrong
  • 2
    Molar concentration
    Correct
    Wrong
  • 3
    Degree of dissociation degree of ionization
    Correct
    Wrong
  • 4
    Degree of ionization
    Correct
    Wrong
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Answer : 1. "Dissociation constant "

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