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Atomic Structure Test - 4

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Atomic Structure Test - 4
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  • Question 1
    1 / -0

    Positivelycharged particle present in the atom is-

    Solution

    According to the question the correct option will beoption ‘D’ because protons are the positively charged particles present in anatom.

  • Question 2
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    A positively charged ion in a compound is called :

    Solution

    A positively charges ion is known as cation. Eg. \(N a^{+}, H^{+}, C a^{2+}\)

    Hence the correct option is D.

  • Question 3
    1 / -0

    Negatively charged particlepresent in the atom is-

    Solution

    According to the question the correct option will beoption ‘C’ because electrons are the negatively charged particles present in anatom. 

  • Question 4
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    Allof these are subatomic particle except-

    Solution

    According to the question the correct option will beoption ‘D’ because Positronis not a subatomic particle. Electrons, protons and neutrons are the subatomicparticles.

  • Question 5
    1 / -0

    Nota part of the Atomic Theory is-

    Solution

    According to the question the correct option will beoption ‘D’ because MainPostulates of Dalton's Atomic Theory
    1) All matter is made of atoms. Atoms are indivisible and indestructible.
    2) All atoms of a given element are identical in mass and properties
    3) Compounds are formed by a combination of two or more different kinds ofatoms.
    4) A chemical reaction is a rearrangement of atoms

    OptionD is not a part of Atomic theory.

  • Question 6
    1 / -0

    the smallest particle in whichmatter can exist is called -

    Solution

    DALTON'S ATOMIC THEORY: According to the question the correct optionwill be option ‘A’ as-

    Matter is made up of very smallindivisible particle called atoms.

    All the atoms of a given elementis identical in all respect i.e. mass, shape, size, etc.

    Atoms cannot be created nordestroyed by any chemical process.

    Atoms of different elements are different innature.

  • Question 7
    1 / -0

    Theatomic theory of matter was proposed by whom-

    Solution

    According to the question the correct option will beoption ‘D’ because heatomic theory of matter was proposed by John Dalton.
    John Dalton (1766-1844) developed the first useful atomic theory ofmatter.

  • Question 8
    1 / -0

    Which of the following correctly represents symbol for silver in Berzelius system?

    Solution

    Ag correctly represents symbol for silver in Berzelius system. It is derived from the name Argentum for silver.

  • Question 9
    1 / -0

    Atomicnumber of an atom refers to the number of-

    Solution

    The atomic number of an atom refers to the number of positively charged particles (protons) and the number of negatively charged particles (electrons) present in an atom.

    According to a formula,

    Atomic Number (Z) = Number of protons (p) = Number of electrons (e)

    Hence, the correct option is (C).

  • Question 10
    1 / -0

    Massnumber refers to the number of-

    Solution

    According to the question the correct option will beoption ‘B’ because massnumber is the sum of the number of protons and neutrons present in the nucleusof an atom.

  • Question 11
    1 / -0

    The theory proposed byDalton was-

    Solution

    According to the question the correct option will be option ‘B’ because John Dalton considered that "all matter is composed of small particle called the atom."

    According to Dalton,

    - Atom is the smallest indivisible part of matter which takes part in the chemical reaction.

    - Atom is neither created nor be destroyed.

  • Question 12
    1 / -0

    Which of the following particlemass is equal to the atomic mass unit?

    Solution

    According to the question the correct option will beoption ‘A’ because Neutrons are the particle with no electrical charge, itsmass is equal to one atomic mass unit.

  • Question 13
    1 / -0

    aroundthe nucleus the sections are available are called-

    Solution

    According to the question the correct option will beoption ‘C’ becauseshells or orbits around the nucleus

  • Question 14
    1 / -0

    Accordingto Dalton's atomic theory, atoms of a given element are identical in which ofthe following-

    Solution

    According to the question the correct option will beoption ‘A’ because Accordingto atomic theory, atoms of a given element are identical in size andchemical properties.

  • Question 15
    1 / -0

    The nucleus of an atom contains-

    Solution

    The nucleus of an atom contains protons (positively charged particles) and neutrons (neutral particles).

    The net charge over the nucleus of an atom is positive.

    Hence, the correct option is (D).

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