IIT JEE Practice Question and Answer

Q: The First Indian city to get " Electric Radio Cabs " is ? 1388 0

  • 1
    Goa
    Correct
    Wrong
  • 2
    Delhi
    Correct
    Wrong
  • 3
    Hyderabad
    Correct
    Wrong
  • 4
    Nagpur
    Correct
    Wrong
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Answer : 4. "Nagpur"
Explanation :

Answer: D) Nagpur Explanation: With India's pledge to go all electric by 2030, Nagpur will be the first city in the country to adopt electric cabs as the country moves a step closer to its goal. The pilot project will see around 200 e-cabs in Nagpur with the local body to provide for the charging stations across the city. Currently, Mahindra and Honda are few of the car-manufacturers who have electric and hybrid vehicles in their line-up. We do hope that the situation changes, as hybrid and electric vehicles will help in the growing pollution in India. Countries such as France, Netherland and Belgium have already started to adopt electric and hybrid vehicles.

Q: It was Tuesday on Jan 1, 2006. What was the day of the week Jan 1, 2010 ? 1387 0

  • 1
    Sunday
    Correct
    Wrong
  • 2
    Friday
    Correct
    Wrong
  • 3
    Monday
    Correct
    Wrong
  • 4
    Tuesday
    Correct
    Wrong
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Answer : 2. "Friday"
Explanation :

Answer: B) Friday Explanation: On 31st December, 2005 it was Monday. Number of odd days from the year 2006 to the year 2009 = (1 + 1 + 2 + 1) = 5 days. On 31st December 2009, it was Thursday. Thus, on 1st Jan, 2010 it is Friday.

Q: Guess the Missing number in the Number Challenge ? 1387 0

  • 1
    8
    Correct
    Wrong
  • 2
    32
    Correct
    Wrong
  • 3
    44
    Correct
    Wrong
  • 4
    64
    Correct
    Wrong
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Answer : 4. "64"
Explanation :

Answer: D) 64 Explanation: The logic in the challenge is  81x6 = 9x6 = 54 144x7=84     Similarly, 64x8 = 8x8 = 64.

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Answer : 4. "All of these"
Explanation :

Answer: D) All of these Explanation:    K    |    J -- L    |    I -- D -- B Here I is female J, K, L & D , B are males Then from the above conditions, All of the given statements are true.

Q: Now my value becomes ? 1386 0

  • 1
    5
    Correct
    Wrong
  • 2
    10
    Correct
    Wrong
  • 3
    15
    Correct
    Wrong
  • 4
    12
    Correct
    Wrong
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Answer : 2. "10"
Explanation :

Answer: B) 10 Explanation: In the first figure, number of triangles are 5. In the second, the figure becomes double then the number of triangles also doubles. i.e, 10.

Q: What are the reactants in a chemical reaction? 1385 0

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Answer :
Explanation :

In a chemical reaction, substances (elements or compounds) called reactants are changed into other substances (compounds or elements) called products. Hence, reactants are those which start the chemical reaction.   For example: 1. In the burning of natural gas, methane (CH4) and oxygen (O2) are the reactants in the chemical reaction. are the substances formed by a chemical reaction. In the burning of natural gas, carbon dioxide (CO2) and water (H2O) are the products formed by the reaction.   2. H2+O2 ----> H2O Here H2 & O2 are called Reactants and H2O is called Product.

Q: Ozone is concentrated in the 1385 0

  • 1
    Stratosphere
    Correct
    Wrong
  • 2
    Troposphere
    Correct
    Wrong
  • 3
    Ionosphere
    Correct
    Wrong
  • 4
    Mesosphere
    Correct
    Wrong
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Answer : 1. "Stratosphere"
Explanation :

Answer: A) Stratosphere Explanation: Most of the ozone in the atmosphere is found in the layer of stratosphere, which begins about 10.16 kilometers (6.10 miles) above Earth's surface and extends up to about 50 kilometers (31 miles) altitude.

Q: What does one mole of H2O correspond to 1384 0

  • 1
    16 gms
    Correct
    Wrong
  • 2
    18 gms
    Correct
    Wrong
  • 3
    20 gms
    Correct
    Wrong
  • 4
    22 gms
    Correct
    Wrong
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Answer : 2. "18 gms"
Explanation :

Answer: B) 18 gms Explanation: The molar mass of H2O can be calculated as the following. M(H2O)= [2 x M(H)] + [M(O)]. And we know that M(H) = 1g/mol, M(O) = 16g/mol. So, M(H2O)= 2x1 + 16 = 18g/mol, That means 1 mole of H2O contains 18g.   Hence, one mole of H2O corresponds to 18 grams.

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