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JEE Main Test 1...

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  • Question 1
    4 / -1

    Statement–1: Intensity of sound waves does not change when the listener moves towards or away from stationary source. 
    Statement–2: The motion of listener causes the apparent change in wavelength.

  • Question 2
    4 / -1

    A carnot engine takes 3 × 106 cal of heat from a reservoir at 627°C, and gives it to a sink at 27°C. The work done by the engine is

  • Question 3
    4 / -1

    Heating an aqueous solution of aluminium chloride to dryness will give

  • Question 4
    4 / -1

    Consider separate solutions of 0.500 M C2H5OH (aq). 0.100 M Mg3(PO4)2(aq). 0.250 M KBr(aq) and 0.125 M Na3PO4(aq) at 25 °C. Which statement is true about these solutions, assuming all salts to be strong electrolytes?

  • Question 5
    4 / -1

    Let A and B denote the statements 
    A: cos α + cosβ + cosγ = 0 
    B : sinα + sinβ + sinγ = 0 
    If cos(β – γ) + cos(γ – α) + cos(α – β) = – 3/2, then

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