IIT JEE Practice Question and Answer

Q: What rights does the Declaration of Independence express? 2521 0

  • 1
    The right to remain silent when interrogated by police
    Correct
    Wrong
  • 2
    The right to citizenship
    Correct
    Wrong
  • 3
    Legal rights of citizens
    Correct
    Wrong
  • 4
    Human rights of citizens, including life and liberty
    Correct
    Wrong
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Answer : 3. "Legal rights of citizens"
Explanation :

Answer: C) Legal rights of citizens Explanation: The Declaration of Independence express Legal rights of citizens.

Q: In a 40 litre mixture of alcohol & water, the ratio of alcohol and water is 5 : 3. If 20% of this mixture is taken out and the same amount of water is added then what will be the ratio of alcohol and water in final mixture? 2518 0

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

Answer: A) 1:1 Explanation: Quantity of alohol in the mixture = 40 x 5/8 = 25 lit Quantity of water = 40 - 25 = 15 lit According to question, Required ratio = 20 - 40 x 20100 x 5815 - 40 x 20100 x 38 + 40 x 20100 = 2015 - 3 + 8 = 1 : 1

Q: The two forms of democracy are 2517 0

  • 1
    Parliamentary and King
    Correct
    Wrong
  • 2
    Monarchical and Republican
    Correct
    Wrong
  • 3
    Direct and Indirect
    Correct
    Wrong
  • 4
    Parliamentary and Presidential
    Correct
    Wrong
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Answer : 4. "Parliamentary and Presidential"
Explanation :

Answer: D) Parliamentary and Presidential Explanation: There are two major forms of democratic government. I. ParliamentaryII. Presidential The citizens elect the leaders in democratic government. The main difference is legislative and executive branches. Executive - head of governmentLegislative - how laws are made   I. Parliamentary democratic government : (example - United Kingdom ) 1. Parliament = Legislature (Laws)2. Parliament controls the power3. Head of government is a prime minister chosen by the legislature4. Prime minister and cabinet are members of the legislature5. Prime minister answers to the legislature (fusion of powers)6. The government will stay in office for a specified period unless the prime minister loses support of the majority on an important vote.7. If this occurs- the P.M. must resign and elections are held immediately.   II. Presidential democratic government : (example - United States of America) 1. The executive and legislative branches are separate bodies elected independently by the citizens.2. Separation of Powers3. There are checks and balances where each branch can overrule the other.4. The president answers to the voters, not the legislature.5. The people elect the president, and elections are held at set intervals.

Q: Which of the following is NOT a representative of a Buddhist Art? 2517 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: The sum of 3rd and 15th elements of an arithmetic progression is equal to the sum of 6th, 11th and 13th elements of the same progression. Then which element of the series should necessarily be equal to zero ? 2516 1

  • 1
    14th element
    Correct
    Wrong
  • 2
    9th element
    Correct
    Wrong
  • 3
    12th element
    Correct
    Wrong
  • 4
    7th element
    Correct
    Wrong
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Answer : 3. "12th element"
Explanation :

Answer: C) 12th element Explanation: If we consider the third term to be ‘x”The 15th term will be (x + 12d)6th term will be (x + 3d)11th term will be (x + 8d) and 13th term will be (x + 10d).Thus, as per the given condition, 2x + 12d = 3x + 21d.Or x + 9d = 0.x + 9d will be the 12th term. Thus, 12th term of the A.P will be zero.

Q: The absorption of ink by blotting paper involves 2516 0

  • 1
    viscosity of ink
    Correct
    Wrong
  • 2
    diffusion of ink through the blotting
    Correct
    Wrong
  • 3
    capillary action phenomenon
    Correct
    Wrong
  • 4
    siphon action
    Correct
    Wrong
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Answer : 3. "capillary action phenomenon"
Explanation :

Answer: C) capillary action phenomenon Explanation: The absorption of ink by blotting paper involves capillary action phenomenon because the blotting paper is a thin and a smooth paper which allows a little thicker liquids like ink to absorb.

Q: Fill in the blanks with suitable prepositions from the given options. The dog was sitting _______ the table waiting _______ catch the ball that was thrown ________ him _________ his master. 2514 0

  • 1
    below, for, to, by
    Correct
    Wrong
  • 2
    under, for, towards, by
    Correct
    Wrong
  • 3
    up, to, towards, by
    Correct
    Wrong
  • 4
    under, to, towards, by
    Correct
    Wrong
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Answer : 4. "under, to, towards, by"
Explanation :

Answer: D) under, to, towards, by Explanation: The dog was sitting under the table waiting to catch the ball that was thrown towards him by his master.

Q: Rajesh rows in still water with a speed of 4.5 kmph to go to a certain place and comes back. Find his average speed for the whole journey, if the river is flowing with a speed of 1.5 kmph? 2513 0

  • 1
    2 kmph
    Correct
    Wrong
  • 2
    4 kmph
    Correct
    Wrong
  • 3
    6 kmph
    Correct
    Wrong
  • 4
    8 kmph
    Correct
    Wrong
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Answer : 2. "4 kmph"
Explanation :

Answer: B) 4 kmph Explanation: Let the distance in one direction = k kms Speed in still water = 4.5 kmph Speed of river = 1.5 Hence, speed in upstream = 4.5 - 1.5 = 3 kmph Speed in downstream = 4.5 + 1.5 = 6 kmph Time taken by Rajesh to row upwards = k/3 hrs Time taken by Rajesh to row downwards = k/6 hrs Now, required Average speed =Total distanceTotal speed = 2kk3 + k6 = 2k x 186k + 3k = 4 kmph    Therefore, the average speed of the whole journey = 4kmph.

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