IIT JEE Practice Question and Answer

Q: Find value of log27 +log 8 +log1000log 120 2097 1

  • 1
    1/2
    Correct
    Wrong
  • 2
    3/2
    Correct
    Wrong
  • 3
    2
    Correct
    Wrong
  • 4
    2/3
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "3/2"
Explanation :

Answer: B) 3/2 Explanation:  = log 33 + log 23+ log 103log10×3×22        =log33 12+log 23+log 10312log(10×3×22)                 =12log 33+3 log 2+12 log103log10+log3+log22                 =32log 3 + 2 log 2 + log 10log 3 + 2 log 2 + log 10 = 32

Q: Which is the highest gallantry award in India? 2097 0

  • 1
    Param Vir Chakra
    Correct
    Wrong
  • 2
    Kirti Chakra
    Correct
    Wrong
  • 3
    Vir Chakra
    Correct
    Wrong
  • 4
    Param Vishishtat Seva Medal
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 1. "Param Vir Chakra"
Explanation :

Answer: A) Param Vir Chakra Explanation: Param Vir Chakra (PVC) is India's highest military decoration awarded for the displaying distinguished acts of valor during the war.   Ashok Chakra Award – An Indian military decoration awarded for valour, courageous action or self-sacrifice away from the battlefield. It is the peacetime equivalent of the Param Vir Chakra. Kirti Chakra – Second in order of precedence of peacetime gallantry awards. Maha Vir Chakra (MVC) is literally called a great warrior medal. Vir Chakra is an Indian gallantry award presented for acts of bravery in the wars.

Q: Which statement describes the term salary? 2097 0

  • 1
    Salary refers to the fixed amount paid on a daily basis.
    Correct
    Wrong
  • 2
    Salary refers to the varying amount paid on a daily basis.
    Correct
    Wrong
  • 3
    Salary refers to the fixed amount paid on a weekly, bi-weekly, or monthly basis.
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "Salary refers to the fixed amount paid on a weekly, bi-weekly, or monthly basis."
Explanation :

Answer: C) Salary refers to the fixed amount paid on a weekly, bi-weekly, or monthly basis. Explanation: A salary is best described as a fixed amount of income that is paid to an individual on a weekly, bi-weekly or monthly basis.   A salary can also be described as the annual earnings paid out over a year.

Q: Lightning heats the surrounding air to 2096 0

  • 1
    300 deg Cent
    Correct
    Wrong
  • 2
    3000 deg Cent
    Correct
    Wrong
  • 3
    30000 deg Cent
    Correct
    Wrong
  • 4
    300000 deg Cent
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "30000 deg Cent"
Explanation :

Answer: C) 30000 deg Cent Explanation: Lightning is extremely hot — a flash can heat the air around it to temperatures five times hotter than the sun’s surface. This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash. Lightning heats the surrounding air to about 30,000 degrees Centigrades.

  • Show AnswerHide Answer
  • Workspace

Answer : 4. "45 kg"
Explanation :

Answer: D) 45 kg Explanation: Let the ratio of initial quantity of oils be 'x' => 4x, 5x & 8x.Let k be the quantity of third variety of oil in the final mixture.Let the ratio of initial quantity of oils be 'y'From given details,4x + 5 = 5y ..... (1)5x + 10 = 7y .....(2)8x + k = 9y ......(3) By solving (1) & (2), we getx = 5 & y = 5 From (3) => k = 5 Therefore, quantity of third variety of oil was 9y = 9(5) = 45kg.

Q: Which type of molecules polar or nonpolar dissolves in water? 2096 0

  • Show AnswerHide Answer
  • Workspace

Answer :
Explanation :

In general, polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes.As water molecules are polar, polar molecules dissolves in water.

Q: What is the next number in this series ?  4, 6, 12, 18, 30, 42, 60, ? 2095 0

  • 1
    71
    Correct
    Wrong
  • 2
    72
    Correct
    Wrong
  • 3
    73
    Correct
    Wrong
  • 4
    69
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "72"
Explanation :

Answer: B) 72 Explanation: With close observation, you will note that each number in the list is in the middle of two prime numbers. Thus: 4 is in the middle of 3 and 5, 6 is in the middle of 5 and 7, 12 is in the middle of 11 and 13, 18 is in the middle of 17 and 19, 30 is in the middle of 29 and 31. 42 is in the middle of 41 and 43, 60 is in the middle of 59 and 61. Therefore, the next number would be the one that is in the middle of the next two prime numbers, which is 72 (which is in the middle of 71 and 73).

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully