IIT JEE Practice Question and Answer

Q: Onion Eating Festival is celebrated in which country ? 5440 0

  • 1
    Sweden
    Correct
    Wrong
  • 2
    Thailand
    Correct
    Wrong
  • 3
    New Delhi
    Correct
    Wrong
  • 4
    Spain
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 4. "Spain"
Explanation :

Answer: D) Spain Explanation: Sweden - Potato Festival Thailand - Vegetarian Festival New Delhi - International Mango Festival Spain - Onion Eating Festival

Q: X can complete the work in 10 days, Y can do the same in 15 days. If they are hired for 5 days to do the work together, what is the work that left unfinished? 2294 0

  • 1
    1/3
    Correct
    Wrong
  • 2
    2/3
    Correct
    Wrong
  • 3
    1/6
    Correct
    Wrong
  • 4
    5/6
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "1/6"
Explanation :

Answer: C) 1/6 Explanation: Given X can do in 10 days  => 1 day work of X = 1/10   Y can do in 15 days  => 1 day work of Y = 1/15   1day work of (X + Y) = 1/10 + 1/15 = 1/6   Given they are hired for 5 days  => 5 days work of (X + Y) = 5 x 1/6 = 5/6  Therefore, Unfinished work = 1 - 5/6 = 1/6

Q: "Light years" is the unit of _____? 1457 0

  • 1
    Acceleration
    Correct
    Wrong
  • 2
    Distance
    Correct
    Wrong
  • 3
    Light Intensity
    Correct
    Wrong
  • 4
    Weight
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "Distance"
Explanation :

Answer: B) Distance Explanation: A Light-year is a distance that light travels in the vacuum in one Julian year (365.25 days). The light-year is a unit of length used to express astronomical distances. It is about 9.5 trillion kilometers or 5.9 trillion miles.

Q: Who has won the men's singles title at the 82nd Senior National Championship? 1693 0

  • 1
    H S Prannoy
    Correct
    Wrong
  • 2
    Ashwini Kumar
    Correct
    Wrong
  • 3
    Rakesh Kumar
    Correct
    Wrong
  • 4
    Kidambi Srikanth
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 1. "H S Prannoy"
Explanation :

Answer: A) H S Prannoy Explanation: H S Prannoy has won the men’s singles title at the 82nd Senior National Championship Senior National Badminton Championships in Nagpur, Maharashtra on November 8, 2017. He defeated higher ranked Kidambi Srikanth in the final by 21- 15, 16- 21, 21-7.

Q: GST Council has decided to keep a total of ________ items in the 28% slab, which was earlier 227. 1170 0

  • 1
    125
    Correct
    Wrong
  • 2
    87
    Correct
    Wrong
  • 3
    100
    Correct
    Wrong
  • 4
    50
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 4. "50"
Explanation :

Answer: D) 50 Explanation: The GST Council on Nov 10th 2017 cut tax rates of over 175 products that were in the highest tax slab of 28% under the Goods and Services Tax (GST) regime.   Currently only 50 items have been left in the 28% category out of a total of 227 items that were present earlier.

Q: If 25% of three-seventh of 26% of a number is 145.5, what is the number? 1343 0

  • 1
    4987
    Correct
    Wrong
  • 2
    5784
    Correct
    Wrong
  • 3
    5223
    Correct
    Wrong
  • 4
    4741
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "5223"
Explanation :

Answer: C) 5223 Explanation: Given,    25% of three-seventh of 26% of a number is 145.5   Let the required number be 'N'   i.e, 25100x37x26100xN = 145.5   N = 145.5x7x1000075x26   => N = 5223.07

Q: A certain amount is divided among P, Q and R in the ratio of 3 : 7 : 6 respectively. If the difference between share of P and Q is Rs. 2700, what is R's share? 1294 0

  • 1
    Rs. 4050
    Correct
    Wrong
  • 2
    Rs. 2121
    Correct
    Wrong
  • 3
    Rs. 5040
    Correct
    Wrong
  • 4
    Rs. 3550
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 1. "Rs. 4050"
Explanation :

Answer: A) Rs. 4050 Explanation: Let the ratio amount be 'p' 7p - 3p = 2700 4p = 2700 p = 675 R's Share = 675 × 6 = Rs. 4050

Q: Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K? 1897 0

  • 1
    K1k2/k1+k2
    Correct
    Wrong
  • 2
    2k1k2/k1+k2
    Correct
    Wrong
  • 3
    K1+k2/k1k2
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "2k1k2/k1+k2"
Explanation :

Answer: B) 2k1k2/k1+k2 Explanation: We know that,   The equivalent K =  L1 + L2L1K1+L2K2   where L1 & L2 are plate1 & Plate2 thicknesses, K1 & K2 are coefficient thermal conductivity of plate1 & Plate2 respectively.   But here L1 = L2 = L (say)   Then K = L+L/(L/K1 + L/K2)  =  2K1K2K1+K2

      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