IIT JEE Practice Question and Answer

Q: Simplify  413 + 215 + 414 = ? 1027 0

  • 1
    10 47/60
    Correct
    Wrong
  • 2
    11 45/73
    Correct
    Wrong
  • 3
    11 47/36
    Correct
    Wrong
  • 4
    10 35/48
    Correct
    Wrong
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Answer : 1. "10 47/60"
Explanation :

Answer: A) 10 47/60 Explanation: The given equation is in Mixed fraction. Now to solve this type of fractions, 413 + 215 + 414 =?? = 4 + 2 + 4 + 13 + 15 + 14 ? = 10 + 4760? = 104760

Q: "The Law of Kepler" is related with which among the following ? 1027 0

  • 1
    Planetary Motion
    Correct
    Wrong
  • 2
    Law of Conservation of energy
    Correct
    Wrong
  • 3
    Law of Gravitation
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 1. "Planetary Motion"
Explanation :

Answer: A) Planetary Motion Explanation: Kepler's laws of planetary motion are three scientific laws describing the motion of planets around the Sun. Kepler’s three laws of planetary motion can be stated as follows: (1) All planets move about the Sun in elliptical orbits, having the Sun as one of the foci. (2) A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time. (3) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun.

Q: When is 99 more than 100? 1025 0

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Answer :
Explanation :

A microwave. Generally when you run a microwave for '99' it runs for 1 minute and 39 seconds. '100' runs for 1 minute.

Q: What part of the atom has a positive charge? 1025 0

  • 1
    Neutron
    Correct
    Wrong
  • 2
    Proton
    Correct
    Wrong
  • 3
    Electron
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 2. "Proton"
Explanation :

Answer: B) Proton Explanation: Protons carry a positive electrical charge, electrons carry a negative electrical charge and neutrons carry no electrical charge at all. The protons and neutrons cluster together in the central part of the atom, called the nucleus, and the electrons 'orbit' the nucleus.

Q: Atomic mass of first 30 elements? 1024 0

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Answer :
Explanation :

Here I give you the first 30 Atomic elements names and their Atomic masses.   Atomic number      Element        Atomic mass                                      1                 Hydrogen           1         2                  Helium              4         3                 Lithium              6.94         4                Beryllium            9.01         5                  Boron               10.81         6                Carbon               12.01         7                Nitrogen             14.01         8                Oxygen              15.99         9                Fluorine              19.00        10                Neon                 20.18        11               Sodium               22.99        12             Magnesium           25.31        13             Aluminium            26.98        14               Silicon                28.09        15             Phosphorus           30.97        16               Sulphur               32.07        17               Chlorine              35.45        18                Argon                 39.95        19             Potassium              39.10        20              Calcium                40.08        21             Scandium              44.96        22             Titanium               47.87        23            Vanadium              50.94        24             Chromium            24. 52        25            Manganese            54.94        26                Iron                  55.85        27              Cobalt                 58.93        28               Nickel                 58.69        29              Copper                 63.55        30                Zinc                   65.41

Q: The 'IFSC Code' is an alphanumeric code comprising 11 characters that facilitates Electronic Fund Transfer in the country. The alphabet 'F' in the abbreviation 'IFSC' stands for ? 1024 0

  • 1
    Fund
    Correct
    Wrong
  • 2
    Fast
    Correct
    Wrong
  • 3
    Financial
    Correct
    Wrong
  • 4
    First
    Correct
    Wrong
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Answer : 3. "Financial"
Explanation :

Answer: C) Financial Explanation: IFSC stands for - Indian Financial System Code. This is a code uniquely identifies each bank branch participating in the two main Payment and settlement systems in India : 1. RTGS - The Real Time Gross Settlement  (and) 2. NEFT - The National Electronic Fund Transfer (NEFT) systems.

Q: Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 seconds. What is the length of the fast train? 1024 0

  • 1
    27 7/9 mts
    Correct
    Wrong
  • 2
    25 8/7 mts
    Correct
    Wrong
  • 3
    21 1/4 mts
    Correct
    Wrong
  • 4
    22 mts
    Correct
    Wrong
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Answer : 1. "27 7/9 mts"
Explanation :

Answer: A) 27 7/9 mts Explanation: Relative speed = (40 - 20) km/hr = 20 x 5 m/sec = 50 m/sec. 18 9  Length of faster train = 50 x 5 m = 250 m = 27 7 m. 9 9 9

Q: How many laws of physics are there? 1022 0

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

Answer: C) 3 Explanation: Physics has 5 laws. But the 3 laws of Newton has been clubbed together under one Law. Therefore there are 3 Newtons laws of Physics. They are ::   1. Newtons Laws of Motion     a. First Law of Motion     b. Second Law of Motion     C. Third Law of Motion   2. Newtons Law of Cooling   3. Newtons Law of Gravitation.

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