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JEE Main Test 78

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JEE Main Test 78
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  • Question 1
    4 / -1

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  • Question 2
    4 / -1

    At a certain temperature, the time required for the complete diffusion of 200 mL of H2 gas is 30 min. The time required for the complete diffusion of 50 mL of O2 gas at the same temperature will be

    Solution

     

  • Question 3
    4 / -1

    A parallel plate capacitor is charged to 60 µC. Due to a radioactive source, the plate loses charge at the rate of 1.8 × 10 -8 Cs-1. The magnitude of displacement current is

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  • Question 4
    4 / -1

    The parameters from of the ellipse 4(x + 1)2 + (y - 1)2 = 4 is

    Solution

     

  • Question 5
    4 / -1

    The eccentricity of the hyperbola with latusrectum 12 and semi - conjugate axis 2√3 is

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  • Question 6
    4 / -1

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  • Question 7
    4 / -1

    The equation of an ellipse whose eccentricity is 1/ 2 and the vertices are (4, 0) and (10, 0), is

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  • Question 8
    4 / -1

    When 0.2 g of 1-butanol was burnt in a suitable apparatus, the heat evolved was sufficient to raise the temperature of 200 g water by 5°C. The enthalpy of combustion of 1-butanol in kcal mol-1 will be

    Solution

     

  • Question 9
    4 / -1

    The initial rate of hydrolysis of methyl acetate (1M) by a weak acid (HA, 1 M) is 1/100th of that of a strong acid (HX, 1 M) at 25o C. The Ka HA is equal to

    Solution

     

  • Question 10
    4 / -1

    The total number of contributing structures showing hyperconjugation (involving C—H bonds) for the following carbocation is

    Solution

     

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