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NEET Test 142
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NEET Test 142
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  • Question 1/10
    4 / -1

    Two isomeric compounds  can be distinguished by the use of:

    Solutions

     

  • Question 2/10
    4 / -1

    Two ideal junction diodes D1 and Dare connected to a battery as shown in the figure. What is the current supplied by the battery if its terminals are interchanged?

    Solutions

    When the terminals are reserved D1 is then reverse biased which will fetch no current, so the resistance 10 ohm is out from the scene now, the current is equal to the resistance and since D2 is forward biased 20 ohm resistance will only be counted therefore current is equal to 5/20 = 0.25A.

     

  • Question 3/10
    4 / -1

    From B2H6, all the following can be prepared except:

    Solutions

     

  • Question 4/10
    4 / -1

    Figure shows three resistor configurations R1,R2 and R3 connected to 3 V battery. If the power dissipated by the configuration R1,R2 and R3 is P1,P2 and P3 respectively then:

    Solutions

     

  • Question 5/10
    4 / -1

    A 800-MW steam power plant, which is cooled by a nearby river, has a thermal efficiency of 40% Rate of heat transfer to the river water is _______ MW.

    Solutions

    Given,

    Work output by Steam power plant = 800 MW,

    Thermal efficiency = 40%,

    Rate of heat transfer to the river water (Sink)

     

  • Question 6/10
    4 / -1

    Destruction of the anterior horn cells of the spinal cord would result in loss of

    Solutions

    Motor neurons in the nuclei of the brainstem cranial nerves are homologous to the spinal cord anterior horn cells. The destruction of the anterior horn cells of the spinal cord would result in the loss of voluntary motor impulses because it is majorly related to the motor impulses.

     

  • Question 7/10
    4 / -1

    Two masses m1 = 6 kg and m= 4 kg are connected by means of a string that passes over a frictionless pulley as shown in the figure. When the masses are released, what is the acceleration of the masses? Take g = 10 ms–2.

    Solutions

    Since 6kg is heavier than 4 kg so it will accelerate down while 4 kg will accelerate up

    So the equation of net force on 6 kg is given as

    6×10−T=6 a

     equation of net force on 4 kg is given as

    T−4×10=4 a

    now add the above two equations

    6×10−(4×10)=(6+4)×a

    60 - 40 = 10 a

    a = 2 m/s2

    So 6 kg will accelerate downwards while 4 kg will accelerate upwards with an acceleration of 2 ms–2.

     

  • Question 8/10
    4 / -1

    Vexillum is found in __________.

    Solutions

    Fabaceae or Papilionaceae is a large and economically important family of flowering plants. Vexillary aestivation is seen in members of Fabaceae. In vexillary aestivation, the outermost posterior petal is large which is known as the vexillum or standard, two lateral petals are known as the wings or alae, and the two anterior and innermost petals are united to form a boat-shaped structure known as the keel or carina. Hence, vexillum is found in Papilionaceae.

     

  • Question 9/10
    4 / -1

    Two bodies A and B have thermal emissivities of 0.01 and 0.81 respectively. The outer surface area of the two bodies are the same. The two bodies radiate energy at the same rate. The wavelength λB, corresponding to the maximum spectral radiancy in the radiation from B, is shifted from the wavelength corresponding to the maximum spectral radiancy in the radiation from A by 1.00μm. If the temperature of A is 5802 K, then:

    Solutions


     

  • Question 10/10
    4 / -1

    Statement A: The process of phloem loading is an active process.

    Statement B: The process of phloem unloading is a passive process.

    Solutions

    Both the process of sucrose loading and unloading in the phloem tissue is an active processes. It is facilitated by the process of osmosis taking place in the adjacent xylem tissue. It develops the water potential gradient which aids the mass movement of sucrose.

     

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