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SSC - Chemistry Test-4
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SSC - Chemistry Test-4
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  • Question 1/10
    1 / -0

    The nucleus of an atom consists of ________.

    Solutions

    The nucleus is the small, dense region consisting of protons and neutrons at the center of an atom. The atomic nucleus was discovered in 1911 by Ernest Rutherford.

  • Question 2/10
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    Anode rays were discovered by?

    Solutions

    An anode ray is a beam of positive ions that are created by certain types of gas discharge tubes. They were first observed in Crookes tubes during experiments by the German scientist Eugen Goldstein in 1886.

  • Question 3/10
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    The most electronegative element is________.

    Solutions

    The most electronegative element is Fluorine assigned a value of 4. Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

  • Question 4/10
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    The mass of electron as determined by J.J. Thomson is_______.

    Solutions

    The invariant mass of an electron is approximately 9.1 X 10 -31kilograms.

  • Question 5/10
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    What is the elements present in urea______?

    Solutions

    Urea orcarbamide is an organic compound with the chemical formulaCO(NH₂)₂. The molecule has two —NH₂ groups joined by a carbonyl (C=O) functional group.

  • Question 6/10
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    Neutrons were discovered by?

    Solutions

    Sir James Chadwick was an English physicist who was awarded the 1935 Nobel Prize in Physics for his discovery of the neutron in 1932.

  • Question 7/10
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    The inert gas abundantly found in widely distributed is_____?

    Solutions

    Argon (Ar) is the most prevalent of the noble gases in Earth's crust with the element composing 0.00015% of this crust.

  • Question 8/10
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    The M.K.S system was first introduced by______?

    Solutions

    The MKS system of units is a physical system of units that expresses any given measurement using fundamental units of the metre, kilogramme, and/or second (MKS). In 1901, Giovanni Giorgi proposed this unit.

  • Question 9/10
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    Which is not a type of elements?

    Solutions

    Elements are classified into three groups.These three groups are: metals, nonmetals, and inert gases.

  • Question 10/10
    1 / -0

    Which is used in preparation of dynamite?

    Solutions

    Dynamite is an explosive material based on nitroglycerin, using diatomaceous earth or another adsorbent substance such as powdered shells or clay

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