Everyday Science

Everyday Science subject is comprise of Biology, Chemistry, Physics, Environmental Science, Geography and Engineering Subjects. This section also carries MCQs about how and why, science shapes our daily lives. Everyday Science or EDS is one of the compulsory subjects in CSS. It is also part of most of general tests conducted by different testing services and government departments, schools or colleges.

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    Everyday Science
    Colours that we see when a CD or DVD is viewed at different angle is due to:
    CDs show rainbow colors because of the combined effects of reflection, diffraction, and transmission of light.
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    Elements and Substances
    How many nonmetals are in gaseous state ?
    There are 11 nonmetals that are in gaseous state at room temperature. They are: Hydrogen, Helium, Nitrogen, Oxygen, Fluorine, Neon, Chlorine, Argon, Krypton, Xenon and Radon.
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    Elements and Substances
    How many non-metals are solids at room temperature excluding metalloids?
    Carbon, phosphorus, sulfur, selenium, and iodine are all non-metals. They are all solids at room temperature.
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    Everyday Science
    Who first proposed the theory of an expanding universe?
    The theory of an expanding universe was first proposed by Edwin Hubble in 1929. He discovered that the light from distant galaxies was shifted towards the red end of the spectrum, which is a phenomenon known as redshift. Redshift is caused by the expansion of space, so Hubble’s discovery provided evidence that the universe is expanding.
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    Everyday Science
    Which type of radiation is absorbed by the ozone layer?
    The upper layer of the atmosphere is called the stratosphere. The stratosphere contains ozone, which is a molecule made up of three oxygen atoms. Ozone absorbs ultraviolet radiation from the sun. Ultraviolet radiation is harmful to life on Earth because it can damage DNA.
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    Everyday Science
    Which instrument is used to measure specific gravity of liquids?
    A hydrometer is an instrument used to measure the specific gravity of liquids. It is a weighted glass tube with a scale marked in specific gravity units. The hydrometer is placed in the liquid to be measured, and the point at which it floats is read off the scale.
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    Everyday Science
    To operate a TV set which of the following is used by TV remote control unit?
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    Food Science
    Which of the following gas is essential for human?
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    Food Science
    Melons for distant marketing arc picked at:
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    Everyday Science
    Materials for rain-proof coats and tents owe their water-proof properties to:
    Surface tension is the force that causes the surface of a liquid to behave like an elastic membrane. It is this force that allows rain-proof coats and tents to keep water out. When water hits the surface of a rain-proof coat or tent, the surface tension of the water causes it to bead up and roll off. This prevents the water from soaking through the material and getting the person wearing the coat or tent wet.
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