IIT JEE Practice Question and Answer

Q: What loses its head every morning and gets it back every night? 1997 0

  • 1
    Pillow
    Correct
    Wrong
  • 2
    Candle
    Correct
    Wrong
  • 3
    Moon
    Correct
    Wrong
  • 4
    Light
    Correct
    Wrong
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Answer : 1. "Pillow"
Explanation :

Answer: A) Pillow Explanation:

Q: Choose the correct order 1) is   2) at   3) TV   4) film   5) midnight   6) a    7) on   8) great   9) There 1996 0

  • 1
    9, 1, 6, 8, 7, 4, 3, 2, 5
    Correct
    Wrong
  • 2
    9, 1, 6, 8, 4, 7, 3, 5, 3
    Correct
    Wrong
  • 3
    9, 1, 6, 8, 4, 7, 3, 2, 5
    Correct
    Wrong
  • 4
    9, 6, 1, 8, 4, 7, 3, 2, 5
    Correct
    Wrong
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Answer : 3. "9, 1, 6, 8, 4, 7, 3, 2, 5"
Explanation :

Answer: C) 9, 1, 6, 8, 4, 7, 3, 2, 5 Explanation: There is a great film on tv at midnight.

Q: Ram sell his goods 25% cheaper than Shyam and 25% dearer than Bram. How much % is Bram's good cheaper than Shyam ? 1996 0

  • 1
    60%
    Correct
    Wrong
  • 2
    40%
    Correct
    Wrong
  • 3
    50%
    Correct
    Wrong
  • 4
    30%
    Correct
    Wrong
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Answer : 2. "40%"
Explanation :

Answer: B) 40% Explanation: Lets say shyam sells at 100,   Since Ram sells 25% cheaper than Shyam,   Therefor Ram sells at less than 25% of100 or 75 rs.   Ram sells 25% dearer than Bram or 125% of Ram =100% of Bram or   125% of x (say x price of bram )=75rs.or 100% of x =60rs.hence price of bram is 60rs.   now Bram's good is cheaper than Shyam's as (100-60)x100/100% or 40%.   Hence Brams Good is 40% cheaper than that of Shyam's good.

Q: Both skin and lung cancer are classified as carcinomas. 1996 0

  • 1
    TRUE
    Correct
    Wrong
  • 2
    FALSE Answer & Explanation Answer:
    Correct
    Wrong
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Answer : 1. "TRUE"
Explanation :

Answer: A) TRUE Explanation: Carcinomas are cancers that begin in tissues lining the inner or outer surfaces of the body where the DNA of the cells become damaged. Lung cancer and one type of skin cancer (squamous-cell carcinoma) are carcinomas.   Hence, the given statement is TRUE.

Q: Okhla Bird Sanctuary is located in 1995 0

  • 1
    Rajasthan
    Correct
    Wrong
  • 2
    West Bengal
    Correct
    Wrong
  • 3
    Maharashtra
    Correct
    Wrong
  • 4
    Uttar Pradesh
    Correct
    Wrong
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Answer : 4. "Uttar Pradesh"
Explanation :

Answer: D) Uttar Pradesh Explanation: Okhla Bird Sanctuary is located in Uttar Pradesh. Okhla Bird Sanctuary is a bird sanctuary at the Okhla barrage over Yamuna River. It is situated in Noida, Gautam Buddh Nagar district, on Delhi-Uttar Pradesh state border and known as a haven for over 300 bird species.

Q: Which of the following is the most stable carbocation? 1994 0

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

Answer: C) 2 Explanation: Here the most stable carbocation is the option (2).   Carbocations are always hungry for electrons. The stability of carbocations increases from primary to secondary to tertiary. Here, option (c) shows the most stable carbocation because it can easily withdraw electrons from two other carbon atoms and the more electronegative oxygen atom.   Carbocation stability depends on hyperconjugation. The tertiary carbocation is stabilized by electron releasing inductive effect.

Q: Eighteen years ago, a mother was three times as old as her daughter. Now the mother is only twice as old as her daughter. Then the sum of the present ages of daughter and the mother is ? 1993 0

  • 1
    84 yrs
    Correct
    Wrong
  • 2
    96 yrs
    Correct
    Wrong
  • 3
    116 yrs
    Correct
    Wrong
  • 4
    108 yrs
    Correct
    Wrong
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Answer : 4. "108 yrs"
Explanation :

Answer: D) 108 yrs Explanation: Let the present ages of the mother and daughter be 2x and x years respectively. Then, (2x - 18) = 3(x - 18) => x = 36 Required sum = (2x + x) = 108 years.

Q: Find the odd man out of the following number sequence? 3, 5, 13, 43, 167 1993 0

  • 1
    167
    Correct
    Wrong
  • 2
    43
    Correct
    Wrong
  • 3
    13
    Correct
    Wrong
  • 4
    5
    Correct
    Wrong
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Answer : 1. "167"
Explanation :

Answer: A) 167 Explanation: The given number series is 3, 5, 13, 43, 167 3 3 x 1 + 2 = 5 5 x 2 + 3 = 13 13 x 3 + 4 = 43 43 x 4 + 5 = 177 (not equal to 167)   Hence, the odd number in the given number sequence is 167.

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