IIT JEE Practice Question and Answer

Q: Which is the best description of civil liberties? 1530 0

  • 1
    privileges
    Correct
    Wrong
  • 2
    rights guaranteed by law
    Correct
    Wrong
  • 3
    natural rights
    Correct
    Wrong
  • 4
    democratic goals
    Correct
    Wrong
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Answer : 2. "rights guaranteed by law"
Explanation :

Answer: B) rights guaranteed by law Explanation: Rights guaranteed by law, is the best description of Civil liberties.

Q: What will come in the place of the (?) in the following number series ? 5 14 45 130 (?) 1182 1530 0

  • 1
    222
    Correct
    Wrong
  • 2
    397
    Correct
    Wrong
  • 3
    404
    Correct
    Wrong
  • 4
    415
    Correct
    Wrong
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Answer : 2. "397"
Explanation :

Answer: B) 397 Explanation: The pattern of given series is : 5 14 = (5x3) - 1 45 = (14x3) + 3 130 = (45x3) - 5 (?) = (130x3) + 7 => (?) = 397 1182 = (397x3) - 9 Thus, the missing number is 397.

Q: Important Time and Distance formulas with examples. 1530 0

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Answer :
Explanation :

1. How to find Speed(s) if distance(d) & time(t) is given:    Speed (S) = Distance (D)Time (T)     Ex: Find speed if a person travels 4 kms in 2 hrs? Speed = D/T = 4/2 = 2 kmph.   2.  Similarly, we can find distance (d)  if speed (s) & time (t) is given by   Distance (D) = Speed (S) x Time (T)   Ex : Find distance if a person with a speed of 2 kmph in 2 hrs? Distance D = S X T = 2 x 2 = 4 kms.    3.  Similarly, we can find time (t) if speed (s) &  distance (d) is given by   Time (T) = Distance (D)Speed (S)   Ex : Find in what time a person travels 4 kms with a speed of 2 kmph? Time T = D/S = 4/2 = 2 hrs.   4. How to convert  km/hr into m/sec :   P km/hr = P x 518 m/sec   Ex : Convert 36 kmph into m/sec? 36 kmph = 36 x 5/18 = 10 m/sec    5. How to convert  m/sec into km/hr :   P m/sec = P x 185 kmph.   Ex : Convert 10 m/sec into km/hr? 10 m/sec = 10 x 18/5 = 36 kmph.   6.  If the ratio of the speeds of A and B is a:b, then the ratio of the times taken by them to cover the same distance is b : a.   7.  Suppose a man covers a certain distance at x km/ hr and an equal distance at y km/hr . Then, the average speed during the whole journey is 2xyx+y km/hr.

Q: Elisa test is employed to diagnose 1530 0

  • 1
    HIV
    Correct
    Wrong
  • 2
    Cancer
    Correct
    Wrong
  • 3
    Tuberculosis
    Correct
    Wrong
  • 4
    Polio
    Correct
    Wrong
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Answer : 1. "HIV"
Explanation :

Answer: A) HIV Explanation: ELISA - Enzyme-Linked Immuno Sorbent Assay.   An ELISA test may be used to diagnose: HIV, which causes AIDS.   An ELISA also called EIA, is a test that detects and measures antibodies in your blood. Antibodies are proteins that your body produces in response to harmful substances called antigens.

Q: Energy is measured in units called 1530 0

  • 1
    Newtons
    Correct
    Wrong
  • 2
    Watts
    Correct
    Wrong
  • 3
    Joules
    Correct
    Wrong
  • 4
    Ohm/mtr
    Correct
    Wrong
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Answer : 3. "Joules"
Explanation :

Answer: C) Joules Explanation: Energy is measured in units called Joules.   Joule is unit of work or energy in the International System of Units (SI) which is equal to the work done by a force of one newton acting through one metre.   1 Joule  =  107 ergs or 0.7377 foot-pounds.

Q: What will come in place of the question mark (?) in the following number series? 5, 7, ?, 25, 45, 75 1529 0

  • 1
    11
    Correct
    Wrong
  • 2
    13
    Correct
    Wrong
  • 3
    15
    Correct
    Wrong
  • 4
    19
    Correct
    Wrong
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Answer : 2. "13"
Explanation :

Answer: B) 13 Explanation: The series given follow the pattern   +2, +2+4, +2+4+6, +2+4+6+8, +2+4+6+8+10,...   Here ? = 7 + 2 + 4 = 13.

Q: Which of the following elements is a metalloid? 1529 0

  • 1
    arsenic
    Correct
    Wrong
  • 2
    boron
    Correct
    Wrong
  • 3
    antimony
    Correct
    Wrong
  • 4
    All of the above
    Correct
    Wrong
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Answer : 4. "All of the above"
Explanation :

Answer: D) All of the above Explanation: A metalloid is any chemical element which has properties in between those of metals and nonmetals, or that has a mixture of them. The six commonly recognised metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium.

Q: Permanent hardness of water is due to the presence of  ? 1529 0

  • 1
    Calcium sulphate
    Correct
    Wrong
  • 2
    Calcium bicarbonate
    Correct
    Wrong
  • 3
    Sodium bicarbonate
    Correct
    Wrong
  • 4
    Magnesium bicarbonate
    Correct
    Wrong
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Answer : 1. "Calcium sulphate"
Explanation :

Answer: A) Calcium sulphate Explanation:

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