IIT JEE Practice Question and Answer

Q: The hot holding temperature for potentially hazardous foods must be 1820 0

  • 1
    not less than 60 deg
    Correct
    Wrong
  • 2
    less than 60 deg
    Correct
    Wrong
  • 3
    less than 5 deg
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 1. "not less than 60 deg"
Explanation :

Answer: A) not less than 60 deg Explanation: Potentially hazardous foods are foods that might contain food poisoning bacteria and are capable of supporting growth of these bacteria or formation of toxins to levels that are unsafe for consumers, if the foods are not stored at correct temperatures. Toxins are poisonous chemicals produced by some types of bacteria. The food can be left at room temperature until it reaches 60 deg C because food-poisoning bacteria will not multiply at 60 deg C or above. However, do not leave food cooling at room temperature unless you are sure that the temperature of the food is still at least above 60 C.

Q: A disaccharide is formed by the chemical bonding of 1820 0

  • 1
    two monosaccharides
    Correct
    Wrong
  • 2
    two polysaccharides
    Correct
    Wrong
  • 3
    one monosaccharide and one polysaccharide
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 1. "two monosaccharides"
Explanation :

Answer: A) two monosaccharides Explanation: Disaccharides are formed when two monosaccharides join together by the dehydration synthesis reaction resulting in a glycosidic bond between the two monosaccharide molecules. The reaction produces water as a side product.

Q: How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed ? 1819 0

  • 1
    5040
    Correct
    Wrong
  • 2
    2525
    Correct
    Wrong
  • 3
    2052
    Correct
    Wrong
  • 4
    4521
    Correct
    Wrong
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Answer : 1. "5040"
Explanation :

Answer: A) 5040 Explanation: The Word LOGARITHMS  contains 10 letters. To find how many 4 letter words we can form from that = P410 =10x9x8x7 = 5040.

Q: In which year was "Jana Gana Mana" adopted as the National Anthem  ? 1819 0

  • 1
    1947
    Correct
    Wrong
  • 2
    1949
    Correct
    Wrong
  • 3
    1951
    Correct
    Wrong
  • 4
    1950
    Correct
    Wrong
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Answer : 4. "1950"
Explanation :

Answer: D) 1950 Explanation: 1950

Q: International Workers' Day or Labour Day is celebrated on ? 1819 0

  • 1
    April 1st
    Correct
    Wrong
  • 2
    May 1st
    Correct
    Wrong
  • 3
    June 1st
    Correct
    Wrong
  • 4
    July 1st
    Correct
    Wrong
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Answer : 2. "May 1st"
Explanation :

Answer: B) May 1st Explanation: International Workers' Day, also known as Labour Day in some countries, is a celebration of labourers and the working classes that is promoted by the international labour movement, socialists, communists or anarchists.  It occurs every year on May Day which is May 1st. It is the day to pay tribute to the Labourers. Without them nothing will complete.  In India, the first Labour Day, or May Day, was celebrated in 1923 in Chennai.

Q: Bacteria divide by 1819 0

  • 1
    Binary Fission
    Correct
    Wrong
  • 2
    Spirilla
    Correct
    Wrong
  • 3
    RNA
    Correct
    Wrong
  • 4
    Fusion
    Correct
    Wrong
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Answer : 1. "Binary Fission"
Explanation :

Answer: A) Binary Fission Explanation: Bacteria divided and reproduce by Binary fission. In this process, the bacterium, which is a single cell, divides into two identical daughter cells. Binary fission begins when the DNA of the bacterium divides into two replicates.

Q: How many bottles of water is a gallon? 1818 0

  • 1
    16
    Correct
    Wrong
  • 2
    8
    Correct
    Wrong
  • 3
    4
    Correct
    Wrong
  • 4
    2
    Correct
    Wrong
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Answer : 2. "8"
Explanation :

Answer: B) 8 Explanation: The easiest way would measure it through half a liter water bottle. There are approximately 16.9 ounces(oz) of water in a 500ml water bottle.   Gallon is an imperial customary volume unit for the U.S.   As we have previously mentioned, the 16.9oz bottle is also known as 500ml in the metric system. According to U.S. standard, 1 gallon stands for 128 fluid oz.   Hence, Number of bottles in 1 gallon = 128/16.9 = 7.57 =~ 8.

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Answer : 1. "131 calls"
Explanation :

Answer: A) 131 calls Explanation: 1st supporter recieve 440 calls 2nd supporter recieve 360 calls 3rd supporter recieve 300 calls So total calls = 1100 calls ; Calls this month= 1500 So remaining calls to be distributed is 400 So Now Ratio 1st:2nd:3rd ==> 440:360:300=> 22:18:15 Now No. of More Calls 2nd supporter will get => [18/(22+18+15)] x 400=> (18/55) x 400 => 131 CallsSo 131 more Calls than last month.

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