IIT JEE Practice Question and Answer

Q: The calendar for the year 2007 will be the same for the year ? 1891 0

  • 1
    2014
    Correct
    Wrong
  • 2
    2019
    Correct
    Wrong
  • 3
    2021
    Correct
    Wrong
  • 4
    2018
    Correct
    Wrong
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Answer : 4. "2018"
Explanation :

Answer: D) 2018 Explanation: Count the number of odd days from the year 2007 onwards to get the sum equal to 0 odd day. Year : 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017Odd day : 1 2 1 1 1 2 1 1 1 2 1 Sum = 14 odd days => 0 odd days.Calendar for the year 2018 will be the same as for the year 2007.

Q: Appellate jurisdiction refers to 1890 0

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Answer :
Explanation :

Appellate jurisdiction refers to the power of a higher court to review decisions and change outcomes of decisions of lower courts.

Q: Two numbers are in the ratio 3 : 7. If 6 be added to each of them, then they are in the ratio 5 : 9. Find the numbers ? 1890 0

  • 1
    11 & 17
    Correct
    Wrong
  • 2
    7 & 17
    Correct
    Wrong
  • 3
    9 & 21
    Correct
    Wrong
  • 4
    13 & 23
    Correct
    Wrong
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Answer : 3. "9 & 21"
Explanation :

Answer: C) 9 & 21 Explanation: Let the two numbers be x and y Given x : y = 3 : 7 .....(1) Now, x+6 : y+6 = 5 : 9 .....(2) From (1), x = 3y/7 From (2), 5y - 9x = 24 => 5y - 9(3y/7) = 24 => y = 21 => From(1), x = 9 Hence, the two numbers be 9 and 21

Q: A quantity of tea is sold at Rs. 5.75 per kilogram. The total gain by selling the tea at this rate is Rs. 60. Find the quantity of tea being sold if a profit of 15% is made on the deal ? 1889 0

  • 1
    72 kgs
    Correct
    Wrong
  • 2
    80 kgs
    Correct
    Wrong
  • 3
    76 kgs
    Correct
    Wrong
  • 4
    84 kgs
    Correct
    Wrong
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Answer : 2. "80 kgs"
Explanation :

Answer: B) 80 kgs Explanation: Say total cost price of tea is x.Then total profit at a rate of 15% is = (15x/100)According to question,15x/100 = 60so x = 400C.p of the tea is Rs. 400.so total selling price will be = (400+60) = Rs.460so the quantity of the tea will be = (460/5.75) = 80kg.

Q: Vishal and Raghu jointly started a business. Vishal invested three times as Raghu did and invested his money for double time as compared to Raghu. Raghu earned Rs. 4000. If the gain is proportional to the money invested and the time for which the money is invested then the total gain was  ? 1889 0

  • 1
    Rs. 28,000
    Correct
    Wrong
  • 2
    Rs. 18,000
    Correct
    Wrong
  • 3
    Rs. 14,000
    Correct
    Wrong
  • 4
    Rs. 8,000
    Correct
    Wrong
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Answer : 1. "Rs. 28,000"
Explanation :

Answer: A) Rs. 28,000 Explanation: Investments ratio is = 3:1Time period ratio is = 2:1 As they are proportional to gain ------Gain ratio of Vishal and raghu = 6:1 But given Raghu got Rs. 4000,  =? 1 ----- 4000     7 -----    ? => Rs.28,000 The total gain = Rs.28,000

Q: Which Soil is Suitable for Agriculture? 1889 0

  • 1
    Alluvial Soils
    Correct
    Wrong
  • 2
    Red Soils
    Correct
    Wrong
  • 3
    Sandy Soils
    Correct
    Wrong
  • 4
    Peaty Soils
    Correct
    Wrong
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Answer : 1. "Alluvial Soils"
Explanation :

Answer: A) Alluvial Soils Explanation: 1. Each type of soil benefits different types of crops through their unique physical, chemical and biological properties.   2. Alluvial Soils are best suitable for Agriculture. This soil is a fertile soil which is rich in potassium.   3. It is best especially for crops such as paddy, sugarcane,...

Q: Amino acids can be distinguished from one another by 1889 0

  • 1
    type of bond between the R group and the rest of the molecule
    Correct
    Wrong
  • 2
    the number of R groups found on the amino acid molecules
    Correct
    Wrong
  • 3
    the chemical properties of their R groups
    Correct
    Wrong
  • 4
    the chemical properties of the amino and carboxyl groups
    Correct
    Wrong
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Answer : 3. "the chemical properties of their R groups"
Explanation :

Answer: C) the chemical properties of their R groups Explanation: Amino acids are organic compounds containing amine (-NH2) and carboxyl (-COOH) functional groups, along with a side chain (R group) specific to each amino acid.   Depending on the nature of the side chain groups, three classes of aminoacids can e distinguished: 1. Amino acids with H ond donor and acceptor groups. Histidine, lysine, aspartic acid, threonine,... 2. Amino acids with donor grups only. Arginine, tryptophan and cysteine. 3. Amino acids with acceptor groups only. Asparagine and glutamine.

Q: Which of the following has the highest entropy? 1887 0

  • 1
    Hydrogen
    Correct
    Wrong
  • 2
    Diamond
    Correct
    Wrong
  • 3
    Liquid nitrogen
    Correct
    Wrong
  • 4
    Mercury
    Correct
    Wrong
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Answer : 1. "Hydrogen"
Explanation :

Answer: A) Hydrogen Explanation: Entropy is a measure of disorder . It will be maximum in gases followed by liquids and least in solids.   Hence, here the gas is only hydrogen and it has the highest entropy.

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