IIT JEE Practice Question and Answer

Q: Which State's chief minister has announced five lakh rupees health-cum-life insurance scheme for farmers in the state? 1493 0

  • 1
    Telangana
    Correct
    Wrong
  • 2
    Uttar Pradesh
    Correct
    Wrong
  • 3
    Gujarat
    Correct
    Wrong
  • 4
    Andhra Pradesh
    Correct
    Wrong
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Answer : 1. "Telangana"
Explanation :

Answer: A) Telangana Explanation:

Q: What is the main function of an ignition safety switch? 1493 0

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Answer :
Explanation :

An ignition safety switch is a safety device can shut off the engine if the operator falls off the PWC or out of the powerboat, or is otherwise thrown from the proper operating position.   How it works: It allows the engine of the vehicle to shut off or to be turned off immediately as it is to prevent further complications to happen as this is being used when an emergency is launched   Where it is used: Most powerboats and PWCs come equipped by the manufacturer with an emergency engine cut-off switch.

Q: K can lay Highway road between two cities in 16 days. L can do the same job in 12 days. With the help of M, they completes the job in 4 days. How much days does it take for M alone to complete the work ? 1492 0

  • 1
    47/7 days
    Correct
    Wrong
  • 2
    59/6 days
    Correct
    Wrong
  • 3
    48/5 days
    Correct
    Wrong
  • 4
    57/5 days
    Correct
    Wrong
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Answer : 3. "48/5 days"
Explanation :

Answer: C) 48/5 days Explanation: Amount of work K can do in 1 day = 1/16 Amount of work L can do in 1 day = 1/12 Amount of work K, L and M can together do in 1 day = 1/4 Amount of work M can do in 1 day = 1/4 - (1/16 + 1/12) = 3/16 – 1/12 = 5/48 => Hence M can do the job on 48/5 days = 9 (3/5) days

Q: Change Active Voice to Passive Voice? Active voice : Has he completed the work? 1492 0

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Answer :
Explanation :

Passive Voice : Has the work been completed by him?   Rules in changing from Active voice to Passive voice : 1. Identify the subject, the verb and the object: S+V+O 2. Change the object into subject 3. Put the suitable helping verb or auxiliary verb 4. Change the verb into past participle of the verb 5. Add the preposition "by" 6. Change the subject into object.

Q: Who has become the first batsman to score three double tons in One Day Internationals? 1492 0

  • 1
    Virat Kohli
    Correct
    Wrong
  • 2
    AB de Villiers
    Correct
    Wrong
  • 3
    Chris Gayle
    Correct
    Wrong
  • 4
    Rohith Sharma
    Correct
    Wrong
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Answer : 4. "Rohith Sharma"
Explanation :

Answer: D) Rohith Sharma Explanation:

Q: Which country imports the most metals? 1492 0

  • 1
    China
    Correct
    Wrong
  • 2
    Japan
    Correct
    Wrong
  • 3
    Africa
    Correct
    Wrong
  • 4
    Australia
    Correct
    Wrong
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Answer : 2. "Japan"
Explanation :

Answer: B) Japan Explanation:

Q: Two trains cross each other in _____ time ? 1491 0

  • 1
    145 sec
    Correct
    Wrong
  • 2
    124 sec
    Correct
    Wrong
  • 3
    158 sec
    Correct
    Wrong
  • 4
    162 sec
    Correct
    Wrong
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Answer : 4. "162 sec"
Explanation :

Answer: D) 162 sec Explanation: Given two trains of length = 180 mts + 180 mts  The distance is = Length of trains = 360 mts  Speed = 58 - 50 = 8 kmph x 5/18 m/s Then, Time = dis/speed = (360x18) / (8x5) = 162 sec.

Q: What is the gram formula mass of Li2SO4? 1491 0

  • 1
    101.2487
    Correct
    Wrong
  • 2
    109.9446
    Correct
    Wrong
  • 3
    111.2687
    Correct
    Wrong
  • 4
    106.5871
    Correct
    Wrong
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Answer : 2. "109.9446"
Explanation :

Answer: B) 109.9446 Explanation: The term gram formula mass is synonymous with molecular mass. So, to get this, we must add molar mass of all the elements in this compound.   Given compound is Lithium Sulphate - Li2SO4 Elemental calculation :: Li  -  Lithium   -   6.941    -     2   -   13.88200 %S  -  Sulfur     -    32.065   -    1   -   32.065 %O  -  Oxygen   -   15.9994  -    4   -   63.9976 % Now, total = 12.6264 + 29.1647 + 58.2090 = 109.9446    Hence, the gram formula mass of Li2SO4 = 109.9446.

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