IIT JEE Practice Question and Answer

Q: Valve between the left ventricle and Aorta? 1418 0

  • 1
    Pulmonic valve
    Correct
    Wrong
  • 2
    Tricuspid valve
    Correct
    Wrong
  • 3
    Aortic valve
    Correct
    Wrong
  • 4
    Mitral valve
    Correct
    Wrong
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Answer : 3. "Aortic valve"
Explanation :

Answer: C) Aortic valve Explanation: The Aortic valve - located between the left ventricle and the aorta The Mitral valve - located between the left atrium and left ventricle The Tricuspid valve - located between the right atrium and the right ventricle (and)  The Pulmonary (pulmonic) valve - located between the right ventricle and the pulmonary artery.

Q: 3 x 3 + 3 - 3 + 3 = ? 1418 0

  • 1
    9
    Correct
    Wrong
  • 2
    12
    Correct
    Wrong
  • 3
    -3
    Correct
    Wrong
  • 4
    3
    Correct
    Wrong
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Answer : 2. "12"
Explanation :

Answer: B) 12 Explanation: Using BODMAS law, 3 x 3 + 3 - 3 + 3 = 3 x 3 = 12 = 12 + 3 - 3 + 3 =  9 + 3 = 12   Hence, 3 x 3 + 3 - 3 + 3 = 12.

Q: The main result of aerobic respiration is the 1418 0

  • 1
    production of lactic acid as an end product
    Correct
    Wrong
  • 2
    production of ATP from the breakdown of glucose
    Correct
    Wrong
  • 3
    conversion of radiant energy into chemical energy
    Correct
    Wrong
  • 4
    storage of energy in a polysaccharide
    Correct
    Wrong
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Answer : 2. "production of ATP from the breakdown of glucose"
Explanation :

Answer: B) production of ATP from the breakdown of glucose Explanation: The three steps within the aerobic respiration process are glycolysis, the citric acid cycle, and oxidative phosphorylation. Photosynthesis builds glucose, and what was built in photosynthesis is broken down during aerobic respiration.   Hence, production of ATP from the breakdown of glucose is the main result of aerobic respiration.

Q: Which award the Electronic Vaccine Intelligence Network (EVIN) app won in 2017 ? 1417 0

  • 1
    Padma Award
    Correct
    Wrong
  • 2
    GSMA Asia Mobile Award
    Correct
    Wrong
  • 3
    Best app of the year
    Correct
    Wrong
  • 4
    National Award
    Correct
    Wrong
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Answer : 2. "GSMA Asia Mobile Award"
Explanation :

Answer: B) GSMA Asia Mobile Award Explanation:

Q: A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of 1417 0

  • 1
    18 m/s
    Correct
    Wrong
  • 2
    25 m/s
    Correct
    Wrong
  • 3
    30 m/s
    Correct
    Wrong
  • 4
    36 m/s
    Correct
    Wrong
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Answer : 3. "30 m/s"
Explanation :

Answer: C) 30 m/s Explanation: The interval between object pass the same point is 4 sec. That means in 2 sec, object reaches the top and in next 2 sec, it again reaches the same point. By the info given, we can find the velocity of that point by using : v=u+(-gt) 0= u - 10×2 u = 20 Then the velocity at 25m is 20m/sec. so the initial velocity is -v2 = u2 + (-2gh)400 = u2 - 2x 10 x 25u2 = 900 => u = 30 m/s

Q: Which of the following uses a Non Renewable Energy Source? 1417 1

  • 1
    Wind Mill Power Plant
    Correct
    Wrong
  • 2
    Hydro Electric Plant
    Correct
    Wrong
  • 3
    Nuclear Power Plant
    Correct
    Wrong
  • 4
    Tidal Power Plant
    Correct
    Wrong
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Answer : 3. "Nuclear Power Plant"
Explanation :

Answer: C) Nuclear Power Plant Explanation: Nuclear Power Plant uses a Non Renewable Energy Source.   Non-renewable energy is that source of energy which can not be used again and again. This sort of energy is sustainable to exhaustion. Non renewable energy is that form of energy which is subject to deletion. This type of energy is of many uses to us. It can be used to produce electricity, heating, cooking, transportation and manufacturing. 85% of the energy used in the industrial processes is form the non-renewable type of energy.

Q: A power that is vested in the president is 1417 0

  • 1
    legally guaranteed by the Supreme Court
    Correct
    Wrong
  • 2
    legally guaranteed by the Constitution
    Correct
    Wrong
  • 3
    subject to approval by the House
    Correct
    Wrong
  • 4
    subject to approval by the Senate
    Correct
    Wrong
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Answer : 2. "legally guaranteed by the Constitution"
Explanation :

Answer: B) legally guaranteed by the Constitution Explanation:

Q: A motorboat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the motorboat and speed of the water current respectively? 1417 0

  • 1
    3:7
    Correct
    Wrong
  • 2
    7:9
    Correct
    Wrong
  • 3
    5:4
    Correct
    Wrong
  • 4
    8:3
    Correct
    Wrong
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Answer : 4. "8:3"
Explanation :

Answer: D) 8:3 Explanation: Let the man's rate upstream be x kmph and that downstream be y kmph. Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs. x x 8 4 = (y x 4) 5 44 x =4y 5  y = 11 x. 5  Required ratio = y + x : y - x 2 2    = 16x x 1 : 6x x 1 5 2 5 2    = 8 : 3 5 5    = 8 : 3.

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