IIT JEE Practice Question and Answer

Q: Which of the following is NOT a representative of a Buddhist Art? 2687 0

  • 1
    Relic Towers
    Correct
    Wrong
  • 2
    Vihara
    Correct
    Wrong
  • 3
    Stupa
    Correct
    Wrong
  • 4
    Chaitya
    Correct
    Wrong
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Answer : 1. "Relic Towers"
Explanation :

Answer: A) Relic Towers Explanation:

Q: Government regulation is intended to 2686 0

  • 1
    discourage producers from taking harmful actions.
    Correct
    Wrong
  • 2
    encourage producers to follow the Constitution.
    Correct
    Wrong
  • 3
    discourage producers from making a profit.
    Correct
    Wrong
  • 4
    encourage producers to take negative actions.
    Correct
    Wrong
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Answer : 1. "discourage producers from taking harmful actions."
Explanation :

Answer: A) discourage producers from taking harmful actions. Explanation: Government regulation protects constitutional rights, safety, and fairness.   Hence, Government regulation is intended to discourage producers from taking harmful actions.

Q: Which type of molecule is CF4? 2686 0

  • 1
    nonpolar, with a symmetrical distribution of charge
    Correct
    Wrong
  • 2
    polar, with an asymmetrical distribution of charge
    Correct
    Wrong
  • 3
    nonpolar, with an asymmetrical distribution of charge
    Correct
    Wrong
  • 4
    polar, with a symmetrical distribution of charge
    Correct
    Wrong
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Answer : 1. "nonpolar, with a symmetrical distribution of charge"
Explanation :

Answer: A) nonpolar, with a symmetrical distribution of charge Explanation: CF4 is tetrahedral. Since the four 'F' atoms have the same electronegativity values, there is no bias in electron distribution toward any one.   Therefore, electron/charge distribution is symmetrical, which also means that the molecule is nonpolar.   Hence, CF4 is nonpolar molecule with a symmetrical distribution of charge.

Q: Chilling is most commonly practiced by 2683 0

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Answer :
Explanation :

Chilling is most commonly practiced by Food Handlers like restaurents, hotels,...   Chilling or Cooling is nothing but preserving the food in a cool storage like refrigerators.

Q: That which cannot be corrected 2679 0

  • 1
    Incorrigible
    Correct
    Wrong
  • 2
    Illegible
    Correct
    Wrong
  • 3
    Illegal
    Correct
    Wrong
  • 4
    Indelible
    Correct
    Wrong
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Answer : 1. "Incorrigible"
Explanation :

Answer: A) Incorrigible Explanation: The One-word substitute for That which cannot be corrected is Incorrigible.

Q: If log72 = m, then log4928 is equal to ? 2678 0

  • 1
    1/(1+2m)
    Correct
    Wrong
  • 2
    (1+2m)/2
    Correct
    Wrong
  • 3
    2m/(2m+1)
    Correct
    Wrong
  • 4
    (2m+1)/2m
    Correct
    Wrong
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Answer : 2. "(1+2m)/2"
Explanation :

Answer: B) (1+2m)/2 Explanation: log4928 = 12log77×4   = 12+122log72= 12+log72= 12 + m= 1+2m2.

Q: A box contains 4 different black balls, 3 different red balls and 5 different blue balls. In how many ways can the balls be selected if every selection must have at least 1 black ball and one red ball ? 2676 0

  • 1
    24 - 1
    Correct
    Wrong
  • 2
    2425-1
    Correct
    Wrong
  • 3
    (24-1)(23-1)25
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 3. "(24-1)(23-1)25"
Explanation :

Answer: C) C Explanation: It is explicitly given that all the 4 black balls are different, all the 3 red balls are different and all the 5 blue balls are different. Hence this is a case where all are distinct objects.   Initially let's find out the number of ways in which we can select the black balls. Note that at least 1 black ball must be included in each selection.   Hence, we can select 1 black ball from 4 black ballsor 2 black balls from 4 black balls.or 3 black balls from 4 black balls.or 4 black balls from 4 black balls.   Hence, number of ways in which we can select the black balls   = 4C1 + 4C2 + 4C3 + 4C4= 24-1 ........(A)   Now let's find out the number of ways in which we can select the red balls. Note that at least 1 red ball must be included in each selection.   Hence, we can select 1 red ball from 3 red ballsor 2 red balls from 3 red ballsor 3 red balls from 3 red balls   Hence, number of ways in which we can select the red balls= 3C1 + 3C2 + 3C3=23-1........(B)   Hence, we can select 0 blue ball from 5 blue balls (i.e, do not select any blue ball. In this case, only black and red balls will be there)or 1 blue ball from 5 blue ballsor 2 blue balls from 5 blue ballsor 3 blue balls from 5 blue ballsor 4 blue balls from 5 blue ballsor 5 blue balls from 5 blue balls.   Hence, number of ways in which we can select the blue balls= 5C0 + 5C1 + 5C2 + … + 5C5= 25..............(C)   From (A), (B) and (C), required number of ways=  2524-123-1

Q: What is the principle carbohydrate of milk? 2675 0

  • 1
    Fructose
    Correct
    Wrong
  • 2
    Sucrose
    Correct
    Wrong
  • 3
    Lactose
    Correct
    Wrong
  • 4
    Galactose
    Correct
    Wrong
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Answer : 3. "Lactose"
Explanation :

Answer: C) Lactose Explanation: Lactose is the major carbohydrate in the milk of most species.   Lactose is a disaccharide composed of the monosaccharides D-glucose and D-galactose, joined in a ß-1,4-glycosidic linkage. The chemical name for lactose is 4-0-ß-D-galactopyranosyl-D-glucopyranose.

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