IIT JEE Practice Question and Answer

Q: Which statement best describes an O3 molecule? 3129 0

  • 1
    The double bond in ozone switches back and forth between the two outer oxygen atoms
    Correct
    Wrong
  • 2
    An ozone molecule contains one single bond and one double bond
    Correct
    Wrong
  • 3
    Each atom in ozone is connected to another atom by 1.5 bonds.
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 2. "An ozone molecule contains one single bond and one double bond"
Explanation :

Answer: B) An ozone molecule contains one single bond and one double bond Explanation: Ozone molecule has one single bond and one double bond.

Q: Which among the following is a folk dance of India? 3108 0

  • 1
    Garba
    Correct
    Wrong
  • 2
    Kathakali
    Correct
    Wrong
  • 3
    Manipuri
    Correct
    Wrong
  • 4
    Mohiniattam
    Correct
    Wrong
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Answer : 1. "Garba"
Explanation :

Answer: A) Garba Explanation:

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Answer : 2. "2 x (18!)"
Explanation :

Answer: B) 2 x (18!) Explanation: A person can be chosen out of 18 people in 18 ways to be seated between Musharraf and Manmohan. Now consider Musharraf, Manmohan, and the third person, sitting between them, as a single personality, we can arrange them in 17! ways but Musharraf and Manmohan can also be arranged in 2 ways.    Required number of permutations = 18 x (17!) x 2 = 2 x 18!

Q: The longest ship canal in the world is the 3100 0

  • 1
    Suez canal, Egypt
    Correct
    Wrong
  • 2
    Kiel canal, Germany
    Correct
    Wrong
  • 3
    Panama canal, Central America
    Correct
    Wrong
  • 4
    St. Laurence Seaway (USA and Canada)
    Correct
    Wrong
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Answer : 4. "St. Laurence Seaway (USA and Canada)"
Explanation :

Answer: D) St. Laurence Seaway (USA and Canada) Explanation:

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Answer : 4. "2834"
Explanation :

Answer: D) 2834 Explanation: Let the total number of votes polled in the election be 100k.Number of valid votes = 100k - 20% (100k) = 80kLet the number of votes polled in favour of K and L be a and b respectively.a - b = 15% (100k) => a = b + 15k=> a + b = b + 15k + bNow, 2b + 15k = 80k and hence b = 32.5kIt is given that 100k = 872032.5k = 32.5k/100k x 8720 = 2834 The number of valid votes polled in favour of L is 2834.

Q: P and Q can complete a job in 24 days working together. P alone can complete it in 32 days. Both of them worked together for 8 days and then P left. The number of days Q will take to complete the remaining work is ? 3085 0

  • 1
    56 days
    Correct
    Wrong
  • 2
    54 days
    Correct
    Wrong
  • 3
    60 days
    Correct
    Wrong
  • 4
    64 days
    Correct
    Wrong
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Answer : 4. "64 days"
Explanation :

Answer: D) 64 days Explanation: (P+Q)'s 1 day work = 1/24 P's 1 day work = 1/32 => Q's 1 day work = 1/24 - 1/32 = 1/96 Work done by (P+Q) in 8 days = 8/24 = 1/3 Remainining work = 1 - 1/3 = 2/3 Time taken by Q to complete the remaining work = 2/3 x 96 = 64 days.

Q: Find the odd one out of the following options. 3078 0

  • 1
    Sapphire
    Correct
    Wrong
  • 2
    Ruby
    Correct
    Wrong
  • 3
    Topaz
    Correct
    Wrong
  • 4
    Granite
    Correct
    Wrong
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Answer : 4. "Granite"
Explanation :

Answer: D) Granite Explanation: Except Granite all other options belong to the group of precious stones.

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