IIT JEE Practice Question and Answer

Q: A seller charges 28% more from a customer as GST on an article. If customer paid Rs. 4544, what is the cost price of the article? 1146 0

  • 1
    Rs. 3550
    Correct
    Wrong
  • 2
    Rs. 2650
    Correct
    Wrong
  • 3
    Rs. 3840
    Correct
    Wrong
  • 4
    Rs. 2450
    Correct
    Wrong
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Answer : 1. "Rs. 3550"
Explanation :

Answer: A) Rs. 3550 Explanation: Let the cost price of the article be 'P' Then from given data, P + 28P100 = 4544=> 128P = 454400=> P = 3550 Hence, the cost price of the article = P = Rs. 3550

Q: Each hemoglobin molecule can transport two molecules of oxygen. 1146 0

  • 1
    TRUE
    Correct
    Wrong
  • 2
    FALSE
    Correct
    Wrong
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Answer : 2. "FALSE"
Explanation :

Answer: B) FALSE Explanation: FALSE. Each hemoglobin molecule can transport four molecules of oxygen.   Hemoglobin, or Hb, is a protein molecule found in red blood cells (erythrocytes) made of four subunits: two alpha subunits and two beta subunits. Heme the component of hemoglobin responsible for binding oxygen consists of an iron ion that binds oxygen and a porphyrin ring that binds the globin molecules, one molecule binds one molecule of oxygen and can bind up to four oxygen molecules.

Q: Cold foods should be kept at a temperature of 1144 0

  • 1
    < 5 deg Celcius
    Correct
    Wrong
  • 2
    > 18 deg Celcius
    Correct
    Wrong
  • 3
    > 41 deg Celcius
    Correct
    Wrong
  • 4
    < -18 deg Celcius
    Correct
    Wrong
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Answer : 1. "< 5 deg Celcius"
Explanation :

Answer: A) < 5 deg Celcius Explanation: To reduce the risk of bacterial contamination, many foods must be stored in the refrigerator and thus kept below 5 degrees Celsius. These foods are often classified as ‘high-risk foods’ and include – meat, poultry, dairy, seafood, eggs, smallgoods and cooked rice and pasta. This also refers to ready-to-eat foods that have high-risk foods as ingredients and include – casseroles, quiche, pasta salad, pizza, sandwiches and many cakes.   By keeping these high-risk foods under 5 degrees Celsius it stops them from entering the ‘danger-zone’ – temperatures between 5 degrees Celsius and 60 degrees Celsius. The danger-zone is the temperature zone which provides bacteria with the perfect environment to rapidly grow and multiply to numbers that cause food poisoning.

Q: One card is drawn from a pack of 52 cards, each of the 52 cards being equally likely to be drawn find the probability the card drawn is red. 1143 0

  • 1
    2/3
    Correct
    Wrong
  • 2
    1/2
    Correct
    Wrong
  • 3
    1/52
    Correct
    Wrong
  • 4
    13/51
    Correct
    Wrong
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Answer : 2. "1/2"
Explanation :

Answer: B) 1/2 Explanation: We know that: When one card is drawn from a pack of 52 cards The numbers of possible outcomes n(s) = 52 We know that there are 26 red cards in the pack of 52 cards⇒ The numbers of favorable outcomes n(E) = 26 Probability of occurrence of an event: P(E)=Number of favorable outcomes/Numeber of possible outcomes=n(E)/n(S) ∴ required probability = 26/52 = 1/2.

Q: Tribal Cooperative Marketing Development Federation of India Limited (TRIFED) has celebrated 'World Honey Bee Day' on ? 1143 0

  • 1
    19th Augusrt
    Correct
    Wrong
  • 2
    21st August
    Correct
    Wrong
  • 3
    D) has celebrated 'World Honey Bee Day' on ? A) 19th Augusrt B) 21st August C)
    Correct
    Wrong
  • 4
    has celebrated 'World Honey Bee Day' on ? A) 19th Augusrt B) 21st August C) 18th August D) 16th August
    Correct
    Wrong
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Answer : 1. "19th Augusrt"
Explanation :

Answer: A) 19th Augusrt Explanation:

Q: What is the freezing point of water in Celsius? 1143 0

  • 1
    0 deg C
    Correct
    Wrong
  • 2
    32 deg C
    Correct
    Wrong
  • 3
    -42 deg C
    Correct
    Wrong
  • 4
    -32 deg C
    Correct
    Wrong
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Answer : 1. "0 deg C"
Explanation :

Answer: A) 0 deg C Explanation: The freezing point of water and melting point is 0 °C or 32 °F. The temperature may be lower if supercooling occurs.

Q: Which warship has become the India’s first warship to install solar panels on board ? 1143 0

  • 1
    INS Sindhudurg
    Correct
    Wrong
  • 2
    INS Sarvekshak
    Correct
    Wrong
  • 3
    NS Vindhyagiri
    Correct
    Wrong
  • 4
    INS Godavari
    Correct
    Wrong
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Answer : 2. "INS Sarvekshak"
Explanation :

Answer: B) INS Sarvekshak Explanation: Indian Navy’s survey vessel INS Sarvekshak has become the India’s first warship to install solar power system on board. The solar power system works on sunlight and hence is 100% per cent reliable for power source that can be used for communication equipment, battery charging and general lightings onboard round the clock with battery outputs during night. The system is maintenance free.

Q: I have a face but no eyes Puzzle 1143 0

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Answer :
Explanation :

A Clock has a face, but no eyes. It has 3 hands i.e, hours, minutes and seconds hands but no arms.

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