IIT JEE Practice Question and Answer

Q: Who is the first richest person in India? 1040 0

  • 1
    Mukesh Ambani
    Correct
    Wrong
  • 2
    Azim Premji
    Correct
    Wrong
  • 3
    Dilip Shangvi
    Correct
    Wrong
  • 4
    Lakshmi Mittal
    Correct
    Wrong
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Answer : 1. "Mukesh Ambani"
Explanation :

Answer: A) Mukesh Ambani Explanation: According to 2018 January reports, Mukesh Ambani is the first richest person in India being 18th in the world, followed by Azim Premji and S.P. Hinduja in second and third places.

Q: Name the two Indian companies that have been named in the list of world's most ethical companies by American think tank Ethisphere Institute. 1038 0

  • 1
    Dabur and Tata
    Correct
    Wrong
  • 2
    Mahindra and Tata
    Correct
    Wrong
  • 3
    Patanjali and Dabur
    Correct
    Wrong
  • 4
    Tata Steel and Wipro
    Correct
    Wrong
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Answer : 4. "Tata Steel and Wipro"
Explanation :

Answer: D) Tata Steel and Wipro Explanation: Two Indian companies, Tata SteelBSE and Wipro have been named in the list of world’s most ethical companies by American think tank Ethisphere Institute. Ethisphere honors those companies who recognize their role in society to influence and drive positive change in the business community and organizations around the world. In 2017, 124 honorees were spanning five continents, 19 countries, and 52 industry sectors. Wipro is one of the two information technology companies named in the list, the other being Xerox Corporation.

Q: Why are hydrocarbons insoluble in water? 1038 0

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Answer :
Explanation :

We know that polar substances are soluble in polar solvents and non polar substances are soluble in non-polar solvents only. Here the hydrocarbons are non-polar molecular substances and water is a polar solvent. So water can't dissolve hydrocabons.   Hence, as hydrocarbons are non-polar substances, they are insoluble in water as it is a highly polar solvent.

Q: Guess the Number missed in Number Challenge ? 1037 0

  • 1
    3
    Correct
    Wrong
  • 2
    5
    Correct
    Wrong
  • 3
    9
    Correct
    Wrong
  • 4
    1
    Correct
    Wrong
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Answer : 2. "5"
Explanation :

Answer: B) 5 Explanation: Sum of numbers in all individual boxes must be equal. Here sum must be equal to 30. => x + 14 + 9 + 2 = 30 => x = 5.

Q: What organelle is responsible for photosynthesis? 1037 0

  • 1
    mitochondria
    Correct
    Wrong
  • 2
    Cytoplasm
    Correct
    Wrong
  • 3
    Chloroplasts
    Correct
    Wrong
  • 4
    Ribosomes
    Correct
    Wrong
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Answer : 3. "Chloroplasts"
Explanation :

Answer: C) Chloroplasts Explanation: Chloroplasts are organelles in plant and bacteria cells that contain the chlorophyll is responsible for photosynthesis.

Q: The difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and 15 as remainder. What is the smaller number  ? 1036 0

  • 1
    270
    Correct
    Wrong
  • 2
    1270
    Correct
    Wrong
  • 3
    350
    Correct
    Wrong
  • 4
    720
    Correct
    Wrong
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Answer : 1. "270"
Explanation :

Answer: A) 270 Explanation: Let the smallest number be x.Then larger number = (x + 1365)x + 1365 = 6x + 15= 5x = 1350 x = 270Smaller number = 270.

Q: Simplify the following : 4 15 × 3 13 + ? = 20% of 120 1036 0

  • 1
    10
    Correct
    Wrong
  • 2
    24
    Correct
    Wrong
  • 3
    36
    Correct
    Wrong
  • 4
    40
    Correct
    Wrong
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Answer : 1. "10"
Explanation :

Answer: A) 10 Explanation: Given equation can be written as 215 x 103 + ? = 24=> 14 + ? = 24=> ? = 24 - 14=> ? = 10

Q: A salesman calculated his profit on the marked price and finds it to be 30%. He forgets the fact that he gave a discount of 20%. What is his actual profit percentage? 1036 0

  • 1
    260/11%
    Correct
    Wrong
  • 2
    18.4%
    Correct
    Wrong
  • 3
    22.5%
    Correct
    Wrong
  • 4
    100/7%
    Correct
    Wrong
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Answer : 4. "100/7%"
Explanation :

Answer: D) 100/7% Explanation: When profit is calculated on Marked Price (M.P) then, C.P = M.P - P% Let M.P = 100  => C.P = 100 - 30 = 70  But S.P = Rs. 80 as he gave 20% discount,  Now, Actual Profit = 80-7070x100   = 100/7 %

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