IIT JEE Practice Question and Answer

Q: Jaduguda mines are famous for 2426 0

  • 1
    mica deposits
    Correct
    Wrong
  • 2
    uranium deposits
    Correct
    Wrong
  • 3
    gold deposits
    Correct
    Wrong
  • 4
    iron ore
    Correct
    Wrong
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Answer : 2. "uranium deposits"
Explanation :

Answer: B) uranium deposits Explanation: The Jaduguda Mine also known as Jadugoda or Jadugora is a Uranium mine in Jaduguda village in the Purbi Singhbhum district of the Indian state of Jharkhand.

Q: Is water a Pure substance? 1088 0

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

Answer: A) TRUE Explanation: True, Water is a Pure substance and not a mixture.   We know that, A mixture is when two or more substances combine physically together. You can find that the mixture retains the properties of the original components. In water, two hydrogen atoms combine with one oxygen atom chemically, forming a new substance that has properties different from hydrogen alone or oxygen alone.   Therefore, water is not a mixture; it is a compound and it is pure.

Q: Which statement best describes an igneous intrusion? 1522 0

  • 1
    Igneous intrusion for when ice crystals splash into lava
    Correct
    Wrong
  • 2
    Magma is injected into surrounding rock forming an igneous intrusive
    Correct
    Wrong
  • 3
    Magma is exported to an open area and forms iron
    Correct
    Wrong
  • 4
    Magma explodes to the surface and forms a smooth outer layer of rock
    Correct
    Wrong
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Answer : 2. "Magma is injected into surrounding rock forming an igneous intrusive"
Explanation :

Answer: B) Magma is injected into surrounding rock forming an igneous intrusive Explanation: Magma is injected into surrounding rock forming an igneous intrusive.   Actually it is a plutonic formation in which magma present beneath Earth surface deforms the shape of rocks present above it

Q: A man can row against the current three fourth of a kilometer in 15 min and returns same distance in 10 min, then ratio of his speed to that of current? 2763 0

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

Answer: A) 5:1 Explanation: Let the speed of the man in still water = p kmph Speed of the current = s kmph Now, according to the questions (p + s) x 10 = (p - s) x 15 2p + 2s = 3p - 3s => p : s = 5 : 1   Hence, ratio of his speed to that of current = 5:1.

Q: Which of the following pairs is mismatched? 2628 0

  • 1
    Pila globosa - pearl
    Correct
    Wrong
  • 2
    Kenia lacca - lac
    Correct
    Wrong
  • 3
    Apis indica - honey
    Correct
    Wrong
  • 4
    Bombyx mori - silk
    Correct
    Wrong
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Answer : 1. "Pila globosa - pearl"
Explanation :

Answer: A) Pila globosa - pearl Explanation: Pinctada vulgaris is a bivalve from which pearl is obtained.

Q: Which of the following is not a polymer? 2173 0

  • 1
    DNA
    Correct
    Wrong
  • 2
    Glucose
    Correct
    Wrong
  • 3
    Starch
    Correct
    Wrong
  • 4
    Cellulose
    Correct
    Wrong
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Answer : 2. "Glucose"
Explanation :

Answer: B) Glucose Explanation: Since A polymer is a large molecule, or macromolecule, composed of many repeated subunits. Glucose is not a polymer.

Q: Which of the following is generally true about the stratosphere? 2209 0

  • 1
    It is very dry
    Correct
    Wrong
  • 2
    It is very moist
    Correct
    Wrong
  • 3
    The dryness level varies with the season
    Correct
    Wrong
  • 4
    The dryness level varies with the moon cycle
    Correct
    Wrong
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Answer : 1. "It is very dry"
Explanation :

Answer: A) It is very dry Explanation: The stratosphere layer of the atmosphere is very dry.

Q: abcdefghijklmnopqrstuvwxyz Riddle What sentence contains all abcdefghijklmnopqrstuvwxyz? 1292 0

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Answer :
Explanation :

The Quick Brown Fox Jumped Over The Lazy Dog  is the sentence which contains all 26 alphabets i.e, from a to z.

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