IIT JEE Practice Question and Answer

Q: Which elements are malleable and good conductors of electricity? 2360 0

  • 1
    tin and silver
    Correct
    Wrong
  • 2
    iodine and silver
    Correct
    Wrong
  • 3
    tin and xenon
    Correct
    Wrong
  • 4
    iodine and xenon
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 1. "tin and silver"
Explanation :

Answer: A) tin and silver Explanation: Tin and Silver are malleable and good conductors of electricity. The other combinations have a non metal in them which are bad conductors.

Q: Rushi and Arun are two business partners. They invest their capital in the ratio 7 : 9. After 6 months, a third person Ram joins them with a capital of two third of that of Arun. After a year, profit share of Rushi was Rs. 5600, then find total profit? 1999 0

  • 1
    26,250
    Correct
    Wrong
  • 2
    19,200
    Correct
    Wrong
  • 3
    18,650,
    Correct
    Wrong
  • 4
    15,200
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 4. "15,200"
Explanation :

Answer: D) 15,200 Explanation: Ratio of investment of all the three members = (7 x 12) : (9 x 12) : (2/3 x 9 x 6) = 7 : 9 : 3 Given Rushi's one year profit = Rs. 5600 => Let the total profit = Rs. P Then, P x 7/19 = 5600 Total profit P = 19 x 5600/7 = Rs. 15,200.

Q: In how many ways the word 'SCOOTY' can be arranged such that 'S' and 'Y' are always at two ends? 2032 0

  • 1
    720
    Correct
    Wrong
  • 2
    360
    Correct
    Wrong
  • 3
    120
    Correct
    Wrong
  • 4
    24
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 4. "24"
Explanation :

Answer: D) 24 Explanation: Given word is SCOOTY ATQ, Except S & Y number of letters are 4(C 2O's T) Hence, required number of arrangements = 4!/2! x 2! = 4! = 4 x 3 x 2 = 24 ways.

Q: Find the odd man out of the following number series? 22, 26, 42, 78, 142, 244 1527 0

  • 1
    244
    Correct
    Wrong
  • 2
    142
    Correct
    Wrong
  • 3
    78
    Correct
    Wrong
  • 4
    42
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 1. "244"
Explanation :

Answer: A) 244 Explanation: The given number series 22, 26, 42, 78, 142, 244 follows a pattern that, 2222 + 22 = 22 + 4 = 2626 + 42 = 26 + 16 = 4242 + 62 = 42 + 36 = 7878 + 82 = 78 + 64 = 142142 + 102 = 142 + 100 = 242    Hence, the odd one in the given number series is 244.

Q: A number when subtracted by 1/7 th of itself gives the same value as the sum of all the angles of a triangle. What is the number? 1796 0

  • 1
    420
    Correct
    Wrong
  • 2
    210
    Correct
    Wrong
  • 3
    70
    Correct
    Wrong
  • 4
    35
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "210"
Explanation :

Answer: B) 210 Explanation: Let the required number be 'p' We know, sum of angles in a triangle are 180 deg According to given data, p - p/7 = 180 7p - p = 180 x 7 => 6p = 1260 => p = 1260/6 = 210

Q: Under which conditions are gases most soluble in water? 1482 0

  • 1
    low pressure and low temperature
    Correct
    Wrong
  • 2
    low pressure and high temperature
    Correct
    Wrong
  • 3
    high pressure and low temperature
    Correct
    Wrong
  • 4
    high pressure and high temperature
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "high pressure and low temperature"
Explanation :

Answer: C) high pressure and low temperature Explanation: Henry's Law tells that the solubility of a gas is directly proportional to the partial pressure of the gas above the solvent. Hence under high pressure, more gas is dissolved. Also that Henry's Law involves a constant which is temperature-dependent. Under high temperatures, less gas is dissolved whereas under low temperatures, more gas is dissolved.   For Example ::   You can think of a can of soda. The contents are under pressure and if you shake the can before opening, the soda fizzes out all over as you open it. So the higher the pressure, the more gas or more CO2 can be dissolved in the drink. Eliminate choices 1 and 2. Now focus on the temperature. Soda goes flat (loses carbonation or gas) as it warms up. Soda is usually served cold because more of the carbonation or CO2 stays in the drink when the soda is cold.   Hence, in high pressure and low temperature conditions gases are most soluble in water.

Q: Ian has 14 boxes of paper and divides them evenly between 4 coworkers. How many whole boxes did each coworker get? 21809 0

  • 1
    2
    Correct
    Wrong
  • 2
    2.5
    Correct
    Wrong
  • 3
    3
    Correct
    Wrong
  • 4
    3.5
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "3"
Explanation :

Answer: C) 3 Explanation: Given number of boxes = 14 Number of workers = 4 Now, number of whole boxes per worker = 14/4 = 3.5  Hence, number of whole boxes per each coworker = 3

Q: Most bacteria reproduce by 1863 0

  • 1
    budding
    Correct
    Wrong
  • 2
    binary fission
    Correct
    Wrong
  • 3
    fragmentation
    Correct
    Wrong
  • 4
    mitosis
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "binary fission"
Explanation :

Answer: B) binary fission Explanation: Most bacteria is reproduce by binary fission.

      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