IIT JEE Practice Question and Answer

Q: The most healthy edible oil for heart is 1779 0

  • 1
    Almond Oil
    Correct
    Wrong
  • 2
    Sesame Oil
    Correct
    Wrong
  • 3
    Mustard Oil
    Correct
    Wrong
  • 4
    Olive Oil
    Correct
    Wrong
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Answer : 4. "Olive Oil"
Explanation :

Answer: D) Olive Oil Explanation:

Q: Which type of forests occupies the highest percentage of area in India  ? 1778 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: Pointing to a photograph, a man said, "I have no brother or sister but that man’s father is my father’s son." Whose photograph was it? 1778 0

  • 1
    His uncle's
    Correct
    Wrong
  • 2
    His nephew's
    Correct
    Wrong
  • 3
    His son's
    Correct
    Wrong
  • 4
    His Cousin's
    Correct
    Wrong
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Answer : 3. "His son's"
Explanation :

Answer: C) His son's Explanation: Since the narrator has no brother, his father’s son is he himself. So, the man who is talking is the father of the man in the photograph. Thus, the man in the photograph is his son.

Q: Find the odd one in the given series ? 5-20-25, 10-40-50, 4-15-24, 25-100-125 1777 0

  • 1
    4-15-24
    Correct
    Wrong
  • 2
    5-20-25
    Correct
    Wrong
  • 3
    10-40-50
    Correct
    Wrong
  • 4
    25-100-125
    Correct
    Wrong
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Answer : 1. "4-15-24"
Explanation :

Answer: A) 4-15-24 Explanation: In each term second two numbers are multiples of the first number. But in 4-15-24 15 is not multiple of 4.

Q: Which continent has the least countries? 1777 0

  • 1
    Africa
    Correct
    Wrong
  • 2
    South America
    Correct
    Wrong
  • 3
    Antarctica
    Correct
    Wrong
  • 4
    Europe
    Correct
    Wrong
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Answer : 3. "Antarctica"
Explanation :

Answer: C) Antarctica Explanation: Africa - 54 countries South America - 12 countries Antarctica - 0 countries Europe - 43 countries.   Hence, Antarctica continent has the least countries.

Q: Which structure is common to plant and animal cells? 1775 0

  • 1
    Centriole
    Correct
    Wrong
  • 2
    Chloroplast
    Correct
    Wrong
  • 3
    Central Vacuole
    Correct
    Wrong
  • 4
    Mitochondria
    Correct
    Wrong
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Answer : 4. "Mitochondria"
Explanation :

Answer: D) Mitochondria Explanation: Mitochondria are present in both plant and animal cells.

Q: It costs Rs. p each to send the first thousand messsages and Rs. q to send each subsequent one . If r is greater than 1,000, how many Rupees will it cost to send r messages ? 1775 0

  • 1
    1000 (r - p) + pq
    Correct
    Wrong
  • 2
    1000 p + qr
    Correct
    Wrong
  • 3
    1000 (r - q) + pr
    Correct
    Wrong
  • 4
    1000(p - q) + qr
    Correct
    Wrong
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Answer : 4. "1000(p - q) + qr"
Explanation :

Answer: D) 1000(p - q) + qr Explanation: We need to find the total cost to send r messsages, r > 1000. The first 1000 messsages will cost Rs.p each (Or)  The total cost of first 1000 messsages = Rs.1000p The remaining (r - 1000) messsages will cost Rs.q each (Or) The cost of the (r - 1000) = Rs.(r - 1000)y   Therefore, total cost = 1000p + rq - 1000q = 1000(p - q) + qr

Q: A boat travels 72 km downstream in 8 hours and 84 km upstream in 12 hours. Find the speed of the boat in still water and the speed of the water current ? 1775 0

  • 1
    9 and 3 kmph
    Correct
    Wrong
  • 2
    6 and 7 kmph
    Correct
    Wrong
  • 3
    8 and 1 kmph
    Correct
    Wrong
  • 4
    7 and 2 kmph
    Correct
    Wrong
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Answer : 3. "8 and 1 kmph"
Explanation :

Answer: C) 8 and 1 kmph Explanation: Downstream speed = 72km/8hrs  = 9 kmphupstream speed = 84km/12hrs = 7 kmphspeed of boat = avg of downstream and upstream speedsspeed of boat = (9+7)/2kmph = 8 kmph.current speed = half of the difference of downstream and upstream speedscurrend speed = (9-7)/2kmph = 1 kmph

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