IIT JEE Practice Question and Answer

Q: In following number series only one number is wrong. Find out that wrong or odd number in the series? 6, 78, 858, 7722, 54055, 270270 1622 0

  • 1
    270270
    Correct
    Wrong
  • 2
    54055
    Correct
    Wrong
  • 3
    7722
    Correct
    Wrong
  • 4
    858
    Correct
    Wrong
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Answer : 2. "54055"
Explanation :

Answer: B) 54055 Explanation: Here the given series follows a pattern that, multiplying the number with odd numbers in decreasing order starting with 13. That is,   6 × 13 = 78   65 × 11 = 858   858 × 9 = 7722   7722 × 7 = 54054   54054 × 5 = 270270   Hence, the wrong number is 54055

Q: Where does translation occur? 1621 0

  • 1
    Nucleus
    Correct
    Wrong
  • 2
    Ribosomes
    Correct
    Wrong
  • 3
    Cytoplasm
    Correct
    Wrong
  • 4
    mitochondrion
    Correct
    Wrong
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Answer : 3. "Cytoplasm"
Explanation :

Answer: C) Cytoplasm Explanation: Right after that, the mRNA enters the cytoplasm through nuclear pores. There, it could be translated into proteins by ribosomes. This process is called translation.   Translation occurs in the cytoplasm whereas transcription occurs in the nucleus.

Q: Animal migration on savannas is often governed by 1621 0

  • 1
    Rainfall
    Correct
    Wrong
  • 2
    Distance
    Correct
    Wrong
  • 3
    Reproduction
    Correct
    Wrong
  • 4
    Fire
    Correct
    Wrong
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Answer : 1. "Rainfall"
Explanation :

Answer: A) Rainfall Explanation: Savannas are home to a wide diversity of animals. Many animals of the savanna migrate throughout the year, searching for food and water. Many of the droughts are seasonal and hit one area before another, so animals are constantly following the rains.   Hence, Rain fall is what often governs animal migration on savannas.

Q: Atmospheric pressure exerted on earth is due to 1621 0

  • 1
    gravitational pull
    Correct
    Wrong
  • 2
    rotation of earth
    Correct
    Wrong
  • 3
    revolution of earth
    Correct
    Wrong
  • 4
    uneven heating of earth
    Correct
    Wrong
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Answer : 1. "gravitational pull"
Explanation :

Answer: A) gravitational pull Explanation: The atmospheric pressure at the surface of the Earth is due to gravitational pull of the earth and is about 14.7 psi.   That means that the weight of a column of air which has a cross section of 1 square inch and which stretches from the surface of the Earth to space is 14.7 pounds.

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Answer : 4. "81.5"
Explanation :

Answer: D) 81.5 Explanation: Let the number of students in classes A, B and C be P, Q and R respectively.Then, total score of A = 83P, total score of B = 76Q, total score of C = 85R.Also given that,(83P + 76Q) / (P + Q) = 79=>4P = 3Q.(76Q + 85R)/(Q + R) = 81=>4R = 5Q,=>Q = 4P/3 and R = 5P/3Therefore, average score of A, B, C = ( 83P + 76Q + 85R ) / (P + Q + R) = 978/12 = 81.5

Q: Which of the following atoms has the largest radius? 1620 0

  • 1
    Br
    Correct
    Wrong
  • 2
    K
    Correct
    Wrong
  • 3
    Na
    Correct
    Wrong
  • 4
    Cl
    Correct
    Wrong
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Answer : 2. "K"
Explanation :

Answer: B) K Explanation: For neutral atoms, the periodic trends in atomic size can be described like this Atomic size decreases when going from left to right across a period,Atomic size increases when going from top to bottom down a group.   Let's use these trends to try and figure out which atom would have the largest radius. If you look at elements that are located in the same group, potassium will have a larger atomic radius when compared with sodium. Likewise, bromine will have a larger atomic radius when compared with chlorine. Now focus on potassium and bromine. Since potassium is located at the start of period 3, and bromine at the end of the same period, potassium will have a larger atomic radius than bromine, and thus the largest atomic radius of the four given atoms.

Q: Which of the following is / are fund managers for National Pension System (NPS) in 2017 ? 1618 0

  • 1
    Axis provident fund
    Correct
    Wrong
  • 2
    Yes bank pension fund
    Correct
    Wrong
  • 3
    ICICI prudential pension
    Correct
    Wrong
  • 4
    Punjab National provident fund
    Correct
    Wrong
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Answer : 3. "ICICI prudential pension"
Explanation :

Answer: C) ICICI prudential pension Explanation: At present in 2017, there are only seven NPS fund managers viz. HDFC Pension Fund, ICICI Prudential Pension, Kotak Pension Fund, LIC Pension Fund,  Reliance Capital Pension, SBI Pension Fund and UTI Retirement Solutions.

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Answer : 4. "50%"
Explanation :

Answer: D) 50% Explanation: Let the salary of Karthik 2 years ago be Rs.100So, Lucky's salary 2 years ago was Rs.50   Karthik's present salary has seen two 10 percent increases. So as Lucky's salary. So, Karthik's salary 1 year ago = 100 + 10% of 100 = 100 + 10 = 110.Karthik's present salary = 110 + 10% of 110 = 110 + 11 = 121.   Lucky's salary 1 year ago = 50 + 10% of 50 = 50 + 5 = 55Lucky's present salary = 55 + 10% of 55 = 55 + 5.5 = 60.5   Lucky's present salary of 60.5 = 50% of Karthik's present salary of 121.

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