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JEE Main Test 7...

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  • Question 1
    4 / -1

    The surface tension of a liquid is 5 Nm-1. If a film is held on a ring of area 0.02 m2, its total surface energy is about

  • Question 2
    4 / -1

    If 189C35 + 189Cχ = 190Cχ, then χ is equal to

  • Question 3
    4 / -1

    A glass flask having mass 390 g and an interior volume of 500 cm3 floats on water when it is less than half–filled with water. The density of the material of the flask is

  • Question 4
    4 / -1

    The ninth term of the expansion (3χ – 1/2χ)8 is

  • Question 5
    4 / -1

    What is the source temperature of the Cannot engine required to get 70% efficiency?
    Given, sink temperature = 27 ℃

  • Question 6
    4 / -1

  • Question 7
    4 / -1

    Three identical spheres, each of mass 1 kg are kept as shown in the figure below, touching each other, with their centres on a straight line. If their centres are marked P, Q, R respectively, the distance of centre of mass of the system from P is

  • Question 8
    4 / -1

  • Question 9
    4 / -1

    Which one of the following has longest covalent bond distance?

  • Question 10
    4 / -1

    The value of n in the molecular formula Ben Al2 Si6 O18 is

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