SSC General Science & Technology Sample Paper NCERT Sample Paper-7

  • question_answer
    Consider the following statements about Nano Technology
    1. Nanotechnology is the science of designing and building on the atomic or molecular level.
    2. The nano scale is one billionth of a meter~ 80,000 times smaller than the width of a human hair.
    3. Nanotechnology is already revolutionizing medicine, science, pharmaceuticals, robotics, electronics, and manufacturing and computer technology. Which of the above statements is/are correct?

    A)  1 and 2

    B)  Only 3

    C)  2 and 3

    D)  All of the above

    Correct Answer: D

    Solution :

    [d] Nanotechnology is the understanding and control of matter at dimensions between approximately 1 and 100 nanometers (nm), where unique phenomena enable novel applications not feasible when working with bulk materials or even with single atoms or molecules. A nanometer is one-billionth of a meter. A sheet of paper is about 100,000 nanometers thick; a single gold atom is about a third of a nanometer in diameter. Researchers seeking to understand the fundamentals of properties at the nanoscale call their work nanoscience; those focused on effective use of the properties call their work nanoengineering. Encompassing nanoscale science, engineering, and technology, nanotechnology involves imaging, measuring, modeling, and manipulating matter at the nanoscale.

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