IIT JEE Practice Question and Answer

Q: Cold foods should be kept at a temperature of 1113 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: Lipids are insoluble in water because lipids are 1113 0

  • 1
    Hydrophobic
    Correct
    Wrong
  • 2
    Zwitter ions
    Correct
    Wrong
  • 3
    Hydrophylic
    Correct
    Wrong
  • 4
    Neutral
    Correct
    Wrong
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Answer : 1. "Hydrophobic"
Explanation :

Answer: A) Hydrophobic Explanation: Lipids are soluble in solvents of low polarity, which simply means that lipids are soluble in nonpolar solvents. This solubility property is a result of the large nonpolar regions that are indicative of the lipid molecule.

Q: Which ministry has started the exercise to revise base year to 2017 - 2018 for computation of wholesale inflation? 1113 0

  • 1
    Ministry of Commerce and Industry
    Correct
    Wrong
  • 2
    Ministry of Finance
    Correct
    Wrong
  • 3
    Ministry of Corporate Affairs
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 1. "Ministry of Commerce and Industry"
Explanation :

Answer: A) Ministry of Commerce and Industry Explanation: The India's commerce and industry ministry has started the exercise to revise base year to 2017-18 for computation of wholesale inflation with a view to present more realistic picture of the price situation   In May last year, the government revised the base year for WPI-based inflation to 2011-12 to give a better indication of changes in prices of commodities.   The new index, with 2017-18, is expected to have new items, which would provide a more realistic picture of price rise and its impact on people.   Most of the additions could be in the manufactured products category. Currently, the index has a total of 697 items, including primary articles, fuel and power and manufactured products.

Q: What it goes up but never comes down? 1113 0

  • 1
    Umbrella
    Correct
    Wrong
  • 2
    Hot air balloon
    Correct
    Wrong
  • 3
    Age
    Correct
    Wrong
  • 4
    Rocket
    Correct
    Wrong
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Answer : 3. "Age"
Explanation :

Answer: C) Age Explanation: Yeah, its your AGE which always goes up but sadly never comes down.

Q: A man purchases two articles, on selling one at loss of 20% while the other at a profit of 25%, he gains the overall profit of 5% than find the ratio of their selling price ? 1111 0

  • 1
    8 : 62.5
    Correct
    Wrong
  • 2
    55 : 8
    Correct
    Wrong
  • 3
    8 : 65
    Correct
    Wrong
  • 4
    64.4 : 9
    Correct
    Wrong
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Answer : 1. "8 : 62.5"
Explanation :

Answer: A) 8 : 62.5 Explanation:                       Article I                   Article II                         -20                         25%                                        5%                         20%                       25%                                                4              :              5 Now, Selling of first article = (4-20%) = 0.8 Selling of second article = (5+25%) =  6.25 Therefore the ratio of selling price = 8 : 62.5

Q: A tank is filled in eight hours by three pipes K, L and M. Pipe K is twice as fast as pipe L, and L is twice as fast as M. How much time will pipe L alone take to fill the tank ? 1111 0

  • 1
    32 hrs
    Correct
    Wrong
  • 2
    24 hrs
    Correct
    Wrong
  • 3
    28 hrs
    Correct
    Wrong
  • 4
    26 hrs
    Correct
    Wrong
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Answer : 3. "28 hrs"
Explanation :

Answer: C) 28 hrs Explanation: 1/K + 1/L + 1/M = 1/8 (Given)Also given that K = 2L and L = 2M=> 1/2L + 1/L + 2/L = 1/8=> (1 + 2 + 4)/2L = 1/8=> 2L/7 = 8=> L = 28 hours.

Q: In the following number series, one of the numbers is wrong. Find it out? 77, 79, 76, 81, 75, 85 1111 0

  • 1
    79
    Correct
    Wrong
  • 2
    81
    Correct
    Wrong
  • 3
    75
    Correct
    Wrong
  • 4
    85
    Correct
    Wrong
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Answer : 3. "75"
Explanation :

Answer: C) 75 Explanation: Here in the given series, it follows a pattern that   77 + 2 = 79   79  - 3 = 76   76 + 5 = 81   81 -  7 = 74   74 + 11 = 85   Consecutive adding and subtracting of prime numbers.   So the wrong number in the given series is 75.

Q: What are the followers of buddhism called? 1110 0

  • 1
    Buddhists
    Correct
    Wrong
  • 2
    Parsis
    Correct
    Wrong
  • 3
    Noble Truths
    Correct
    Wrong
  • 4
    Bhikkhus
    Correct
    Wrong
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Answer : 1. "Buddhists"
Explanation :

Answer: A) Buddhists Explanation: Buddhism is the world's fourth-largest religion, with over 520 million followers or over 7% of the global population. People who practice Buddhism are called Buddhists.   Buddhists seek to reach a state of nirvana, following the path of the Buddha, Siddhartha Gautama, who went on a quest for Enlightenment around the sixth century BC. There is no belief in a personal god.

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