IIT JEE Practice Question and Answer

Q: Which planet has maximum satellite? 1711 0

  • 1
    Saturn
    Correct
    Wrong
  • 2
    Earth
    Correct
    Wrong
  • 3
    Jupiter
    Correct
    Wrong
  • 4
    Mars
    Correct
    Wrong
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Answer : 3. "Jupiter"
Explanation :

Answer: C) Jupiter Explanation: Jupiter has 67 natural satellites. Eight of Jupiter's moons are regular satellites, with 4 large, spherical moons, and 4 smaller moons that orbit closer to Jupiter. Jupiter has an additional 55 tiny irregular satellites.   The planet with the second highest number of moons is Saturn, with 61 moons. Earth has only one natural satellite i.e, Moon. Mercury and Venus have no satellites.

Q: I will disappear every time you say my name. What am I? 1687 0

  • 1
    Thief
    Correct
    Wrong
  • 2
    Silence
    Correct
    Wrong
  • 3
    Shadow
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 2. "Silence"
Explanation :

Answer: B) Silence Explanation:

Q: Flower : Bud :: Plant : ? 1524 0

  • 1
    Seed
    Correct
    Wrong
  • 2
    Leaf
    Correct
    Wrong
  • 3
    Twig
    Correct
    Wrong
  • 4
    Root
    Correct
    Wrong
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Answer : 1. "Seed"
Explanation :

Answer: A) Seed Explanation: A bud is an undeveloped or embryonic shoot and may be specialized to develop flowers. Similarly, Seed is undeveloped and may be developed into a plant.   Hence, Flower : Bud :: Plant : Seed.

Q: Which of the following is the lightest metal? 2312 0

  • 1
    Lithium
    Correct
    Wrong
  • 2
    Silver
    Correct
    Wrong
  • 3
    Mercury
    Correct
    Wrong
  • 4
    Lead
    Correct
    Wrong
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Answer : 1. "Lithium"
Explanation :

Answer: A) Lithium Explanation: Lithium is the lightest metal and the lightest solid element. It is a soft, silvery-white alkali metal. Under standard conditions. Like all alkali metals, lithium is highly reactive and flammable and is stored in mineral oil.

Q: Which is a common first indicator of an approaching thunderstorm? 17086 0

  • 1
    too hot
    Correct
    Wrong
  • 2
    heavy wind
    Correct
    Wrong
  • 3
    a buildup of dark clouds
    Correct
    Wrong
  • 4
    lightning
    Correct
    Wrong
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Answer : 3. "a buildup of dark clouds"
Explanation :

Answer: C) a buildup of dark clouds Explanation: The first indicator of an approaching thunderstorm is a buildup of dark clouds. A thunderstorm is a storm with lightning and thunder; it is usually produced by heavy rain, gusty wind, and the cumulonimbus cloud. The thunderstorm is made up of moisture, unstable air and lift.

Q: How many pints of blood in the human body? 2378 0

  • 1
    6 - 8
    Correct
    Wrong
  • 2
    10 - 12
    Correct
    Wrong
  • 3
    8 - 10
    Correct
    Wrong
  • 4
    5 - 7
    Correct
    Wrong
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Answer : 2. "10 - 12"
Explanation :

Answer: B) 10 - 12 Explanation: Scientists estimate the volume of blood in a human body to be approximately 7 percent of body weight. An average adult body with a weight of 150 to 180 pounds will contain approximately 4.7 to 5.5 liters of blood. An average child with a body weight of 80 pounds will have approximately half the amount of blood as an adult. The amount of blood in a human body varies, depending on factors such as age, sex, overall health and even where a person lives. For example, men tend to have more blood than women of comparable size and weight. Interestingly, people who live at high altitudes may have up to two liters of extra blood compared to those who live at lower altitudes. Because the air at higher altitudes has less oxygen, people who live at high altitudes need extra blood to deliver the right amount of oxygen to their lungs.   We know that 1 Pint = 0.473 liters   Hence, an average amount of blood in the human body = 4.7 - 5.5 lit = 10 - 12 pints.

Q: Soil erosion can be prevented by 1844 0

  • 1
    Removal of vegetation
    Correct
    Wrong
  • 2
    Overgrazing
    Correct
    Wrong
  • 3
    Afforestation
    Correct
    Wrong
  • 4
    Increasing bird population
    Correct
    Wrong
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Answer : 3. "Afforestation"
Explanation :

Answer: C) Afforestation Explanation: The four most common soil erosion prevention methods are vegetation, geotextiles, mulch, and retaining walls. By planting grass in areas of concentrated water flow, farmers can prevent much of the soil erosion that results from runoff, as the grass stabilizes the soil while still providing an outlet for drainage. Preventing soil erosion is critical in protecting your property and exposed soil, whether from wind, weather, running water, and even the after-effects of the forest fire.

Q: In economics,"capital" refers to 1407 0

  • 1
    mineral resources
    Correct
    Wrong
  • 2
    the money in one's pocket
    Correct
    Wrong
  • 3
    consumer goods
    Correct
    Wrong
  • 4
    buildings and equipment
    Correct
    Wrong
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Answer : 4. "buildings and equipment"
Explanation :

Answer: D) buildings and equipment Explanation: Capital refers to buildings and equipment i.e, goods which are used by workers to produce other goods such as machinery, land, ... Capital has a number of related meanings in economics, finance, and accounting. In economics, Capital comprises one of the four major factors of production, the others being land, labor, and entrepreneurship. In finance and accounting, capital generally refers to financial wealth, especially that used to start or maintain a business.

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