IIT JEE Practice Question and Answer

Q: The first attempt made to enumerate the population of India was done in which year ? 1986 0

  • 1
    1884
    Correct
    Wrong
  • 2
    1896
    Correct
    Wrong
  • 3
    1921
    Correct
    Wrong
  • 4
    1872
    Correct
    Wrong
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Answer : 4. "1872"
Explanation :

Answer: D) 1872 Explanation:

Q: In which of the following organelles does photosynthesis take place? 1985 0

  • 1
    Miochondria
    Correct
    Wrong
  • 2
    Chloroplast
    Correct
    Wrong
  • 3
    Central Vacuole
    Correct
    Wrong
  • 4
    Ribosome
    Correct
    Wrong
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Answer : 2. "Chloroplast"
Explanation :

Answer: B) Chloroplast Explanation: Chloroplasts use energy from light to transform carbon dioxide and water into sugar and oxygen. A green pigment located in membranes within the chloroplasts of plants and algae and in the membranes of certain prokaryotes.

Q: The price of pulses has increased by 25%. The percentage of reduction that a family should effect in the use of pulses so as not to increase the expenditure on this account is ? 1985 0

  • 1
    16%
    Correct
    Wrong
  • 2
    20%
    Correct
    Wrong
  • 3
    84%
    Correct
    Wrong
  • 4
    72%
    Correct
    Wrong
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Answer : 2. "20%"
Explanation :

Answer: B) 20% Explanation: Reduction in consumption= P100+P X 100%= 25100+25 X 100%= 20%

Q: What can be swallowed but can swallow you? 1985 0

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Answer :
Explanation :

Your Pride. Yes, you can swallow your pride or it can swallow you.

Q: Which type of forests occupies the highest percentage of area in India  ? 1984 2

  • 1
    Savanna & desert vegetation
    Correct
    Wrong
  • 2
    Tropical deciduous
    Correct
    Wrong
  • 3
    Tropical Rainforests
    Correct
    Wrong
  • 4
    Equatorial evergreen
    Correct
    Wrong
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Answer : 2. "Tropical deciduous"
Explanation :

Answer: B) Tropical deciduous Explanation: Tropical Deciduous Forests: They are also called the “Monsoon forests”. They grow in the areas with annual rainfall of 70-200 cm. Sandal wood, Shisam, Mahua, Sal, Teak and Bamboo are important species of trees. Moist deciduous and the dry deciduous forests are two major categories of these forests.

Q: At what time, between 3 o’clock and 4 o’clock, both the hour hand and minute hand coincide each other  ? 1983 0

  • 1
    3:16 7/11
    Correct
    Wrong
  • 2
    3:16 11/4
    Correct
    Wrong
  • 3
    3:30
    Correct
    Wrong
  • 4
    3:16 4/11
    Correct
    Wrong
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Answer : 4. "3:16 4/11"
Explanation :

Answer: D) 3:16 4/11 Explanation: Coincide means 00  angle. This can be calculated using the formulafor time A to B means  [11m/2 - 30 (A)] Here m gives minutes after A the both hands coincides. Here A = 3, B = 4 0 =11m/2 –30 × 311m = 90 × 2 = 180m= 180/11 = 16 4/11 So time = 3 : 16 4/11

Q: Which of the following has the highest entropy? 1981 0

  • 1
    Hydrogen
    Correct
    Wrong
  • 2
    Diamond
    Correct
    Wrong
  • 3
    Liquid nitrogen
    Correct
    Wrong
  • 4
    Mercury
    Correct
    Wrong
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Answer : 1. "Hydrogen"
Explanation :

Answer: A) Hydrogen Explanation: Entropy is a measure of disorder . It will be maximum in gases followed by liquids and least in solids.   Hence, here the gas is only hydrogen and it has the highest entropy.

Q: Which of the Following is an Amorphous solid? 1980 0

  • 1
    Quartz Glass(Sio2)
    Correct
    Wrong
  • 2
    Chrome Alum
    Correct
    Wrong
  • 3
    Silicon Carbide(SiC)
    Correct
    Wrong
  • 4
    Graphite
    Correct
    Wrong
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Answer : 1. "Quartz Glass(Sio2)"
Explanation :

Answer: A) Quartz Glass(Sio2) Explanation: An amorphous or non-crystalline solid is a solid that lacks the long-range order that is characteristic of a crystal. In Brief, An amorphous solid is any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel. Quartz glass (SiO2) is an amorphous solid due to its short range order of constituent particles. Note Quartz is a crystalline solid while quartz glass is an amorphous solid.

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