IIT JEE Practice Question and Answer

Q: 125% as a Fraction? 1293 0

  • 1
    1/4
    Correct
    Wrong
  • 2
    3/4
    Correct
    Wrong
  • 3
    5/4
    Correct
    Wrong
  • 4
    7/4
    Correct
    Wrong
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Answer : 3. "5/4"
Explanation :

Answer: C) 5/4 Explanation: Literally any percentage means divide by 100. So 125% = 125100. That can be reduced to 5/4. To convert to a decimal, you can do long division, dividing 5 into 4.

Q: What is the function of an antagonist in a story? 1292 0

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Answer :
Explanation :

The antagonist is the negative or opposing force in a story. It could be a human enemy, or it could be non-human, like an animal or something less tangible, like fear.   The antagonist plays an important role in story development.

Q: What is the least number of squares tiles required to pave the floor of a room 15 m 17 cm long and 9 m 2 cm broad ? 1292 0

  • 1
    844
    Correct
    Wrong
  • 2
    814
    Correct
    Wrong
  • 3
    840
    Correct
    Wrong
  • 4
    820
    Correct
    Wrong
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Answer : 2. "814"
Explanation :

Answer: B) 814 Explanation: Length of largest tile = H.C.F. of 1517 cm and 902 cm = 41 cm.Area of each tile = (41 x 41) sq.cm Required number of tiles =1517 x 902/(41 x 41) = 814.

Q: The Union Territories get representation in 1291 0

  • 1
    Lok Sabha
    Correct
    Wrong
  • 2
    Rajya Sabha
    Correct
    Wrong
  • 3
    Both A & B
    Correct
    Wrong
  • 4
    Supreme Court
    Correct
    Wrong
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Answer : 3. "Both A & B"
Explanation :

Answer: C) Both A & B Explanation: The Union Territories get representation in Both the houses of Parliament i.e, The Lok Sabha and The Rajya Sabha.

Q: Solve the Number Puzzle ? 1290 0

  • 1
    20
    Correct
    Wrong
  • 2
    24
    Correct
    Wrong
  • 3
    26
    Correct
    Wrong
  • 4
    30
    Correct
    Wrong
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Answer : 3. "26"
Explanation :

Answer: C) 26 Explanation: Here the puzzle follows the logic that Right side number = sum of the number on the left side and the previous number on the left side => 6 = 4+2 => 10 = 6+4 => ? = 16+10 = 26.

Q: State-run Bharat Sanchar Nigam (BSNL) unveiled its mobile wallet in partnership with _______ to enable one-tap bill payment for its over 100 million subscribers. 1289 0

  • 1
    Free Charge
    Correct
    Wrong
  • 2
    MobiWik
    Correct
    Wrong
  • 3
    Paytm
    Correct
    Wrong
  • 4
    Ezetap
    Correct
    Wrong
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Answer : 2. "MobiWik"
Explanation :

Answer: B) MobiWik Explanation:

Q: Find the principal if the interest compounded at the rate of 10% per annum for two years is Rs. 420 ? 1289 0

  • 1
    Rs. 2000
    Correct
    Wrong
  • 2
    Rs. 2100
    Correct
    Wrong
  • 3
    Rs. 1900
    Correct
    Wrong
  • 4
    Rs. 2150
    Correct
    Wrong
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Answer : 1. "Rs. 2000"
Explanation :

Answer: A) Rs. 2000 Explanation: Given, Compound rate, R = 10% per annumTime = 2 yearsC.I = Rs. 420Let P be the required principal.A = (P+C.I)Amount, A = P1 + r100n (P+C.I) = P1 + 101002 (P+420) = P[11/10][11/10] P-1.21P = -420 0.21P = 420 Hence, P = 420/0.21 = Rs. 2000

Q: Order of basicity of amines in gaseous state? 1289 0

  • 1
    2'> 1'> 3' > NH3
    Correct
    Wrong
  • 2
    3' > 2' > 1'> NH3
    Correct
    Wrong
  • 3
    1' > 2' > 3'> NH3
    Correct
    Wrong
  • 4
    2'> 3'> 1' > NH3
    Correct
    Wrong
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Answer : 2. "3' > 2' > 1'> NH3"
Explanation :

Answer: B) 3' > 2' > 1'> NH3 Explanation: The order of basicity in ammonia is different in gaseous phases vs. aqueous phases due to hydrogen bonding.   So in gaseous phases it's the well known: 3' > 2' > 1'> NH3. Just so we're on the same page, this is due to the inductive effect of electron donating alkyl groups--they destabilize the lone pair on nitrogen atom, making nitrogen more basic.   But in aqueous phase, the order is slightly different: 2'> 1'> 3' > NH3.

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