IIT JEE Practice Question and Answer

Q: The amount of Matter in an Object is 1715 0

  • 1
    Weight
    Correct
    Wrong
  • 2
    Mass
    Correct
    Wrong
  • 3
    Volume
    Correct
    Wrong
  • 4
    Space
    Correct
    Wrong
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Answer : 2. "Mass"
Explanation :

Answer: B) Mass Explanation: Mass means the amount of matter in an object. Anything that has Mass and takes up Space is called Matter.   The Study of Matter and and how matter changes is called Chemistry.   Matter has some mass and occupies some space. Space occupied by an object is called its Volume.

Q: Some children goto ice-cream shop. 9 flavours are available there. Each child takes a cone with two different flavours. No two children take same combination and they have taken all such possible combinations. How many children went to ice cream shop ? 1714 0

  • 1
    28
    Correct
    Wrong
  • 2
    56
    Correct
    Wrong
  • 3
    44
    Correct
    Wrong
  • 4
    36
    Correct
    Wrong
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Answer : 4. "36"
Explanation :

Answer: D) 36 Explanation: Given there are 9 flavours of ice creams.   Each child takes the combination of two flavours and no two children will have the same combination   This can be done by  ways i.e children.   Number of children=C29  = 9 x 8 / 1x 2 = 36.

Q: Why are you the best candidate for this position? 1714 0

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Answer :
Explanation :

I am a fast learner, as I had to learn a totally new operating system in my last job and I was up and running within a couple of weeks.   As you require someone who can perform wide range of administrative work, I have a track record of carrying different tasks efficiently and effectively.   I have the right combination of skills and experiance for this job. I also bring the additional quality of strong analytical and problem solving ability as shown by my introduction of a more efficient work flow system at some company.

Q: A is two years older than B who is twice as old as C. If the total of the ages of A, B and C be 27, then how old is B ? 1713 0

  • 1
    10 yrs
    Correct
    Wrong
  • 2
    11 yrs
    Correct
    Wrong
  • 3
    12 yrs
    Correct
    Wrong
  • 4
    13 yrs
    Correct
    Wrong
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Answer : 1. "10 yrs"
Explanation :

Answer: A) 10 yrs Explanation: Let C's age be x years. Then, B's age = 2x years. A's age = (2x + 2) years. (2x + 2) + 2x + x = 27 5x = 25 => x = 5 Hence, B's age = 2x = 10 years.

Q: Solve the Missing Number Puzzle ? 1713 0

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Answer :
Explanation :

The rule followed here is 7 + 3 - 4 = 6 Similarly, 4 + 2 - 2 = 4 9 + 5 - 4 = 10 Hence, the missing numbers are 4 & 10.

Q: Which part of the flame is the hottest? 1713 0

  • 1
    Blue Zone
    Correct
    Wrong
  • 2
    Luminous Zone
    Correct
    Wrong
  • 3
    Dark Zone
    Correct
    Wrong
  • 4
    Non - Luminous Zone
    Correct
    Wrong
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Answer : 1. "Blue Zone"
Explanation :

Answer: A) Blue Zone Explanation: Blue Zone is the hottest part of the flame that is where the flame has the most Oxygen and you are getting complete combustion. It is about 1400 degrees Centigrades. The Reddish part (Non - Luminous Zone) is the coolest part, about 800 deg C.

Q: Which of the following polysaccharides contains a modified monosaccharide? 1711 0

  • 1
    starch
    Correct
    Wrong
  • 2
    chitin
    Correct
    Wrong
  • 3
    glycogen
    Correct
    Wrong
  • 4
    cellulose
    Correct
    Wrong
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Answer : 2. "chitin"
Explanation :

Answer: B) chitin Explanation: Many carbohydrates contain one or more modified monosaccharide units that have had one or more groups replaced or removed.   Chitin is one of many naturally occurring polymers. It is one of the most abundant natural materials in the world. Over time it is bio-degradable in the natural environment. Its breakdown may be catalyzed by enzymes called chitinases, secreted by microorganisms such as bacteria and fungi, and produced by some plants.   Chitin is composed of repeating units of N-acetylglucosamine, a nitrogen-containing form of glucose.

Q: What frequency range is the high frequency band? 1711 0

  • 1
    3 kHz
    Correct
    Wrong
  • 2
    3 to 30 MHz
    Correct
    Wrong
  • 3
    30 to 300 MHz
    Correct
    Wrong
  • 4
    10 GHz
    Correct
    Wrong
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Answer : 2. "3 to 30 MHz"
Explanation :

Answer: B) 3 to 30 MHz Explanation: The HF band is based on frequencies 3 to 30 Mhz. AM radio stations are in the HF band but normally are stated in kilohertz.

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