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Science MCQ

T1 CH4 Atomic Structure · Tamil Nadu Board STD 7 (Tamil - English Medium). 15 questions.

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15 questions · auto-graded multiple-choice test.

MCQ 11 Mark
Nucleons comprises of______.
  • A
    protons and electrons
  • B
    neutrons and electrons
  • ✓
    protons and neutrons
  • D
    neutrons and positron
Answer
Correct option: C.
protons and neutrons
protons and neutrons
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MCQ 21 Mark
The atomic number of an atom is the ______.
  • A
    number of neutrons
  • ✓
    number of protons
  • C
    total number of protons and neutrons
  • D
    number of atoms
Answer
Correct option: B.
number of protons
number of protons
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MCQ 41 Mark
The sub-atomic particle which revolves around the nucleus is ______.
  • A
    atom
  • B
    neutron
  • ✓
    electron
  • D
    proton
Answer
Correct option: C.
electron
electron
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MCQ 61 Mark
Proton was discovered by ________
  • ✓
    Rutherford
  • B
    Goldstein
  • C
    Chadwick
  • D
    J.J. Thomson
Answer
Correct option: A.
Rutherford
Rutherford
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MCQ 71 Mark
Protons and neutrons are called ________
  • A
    atom
  • ✓
    nucleons
  • C
    positive charge
  • D
    negative charge
Answer
Correct option: B.
nucleons
nucleons
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MCQ 81 Mark
J.J Thomson’s atom model is also called as ________
  • ✓
    Plum pudding model
  • B
    gold foil
  • C
    alpha particle
  • D
    none
Answer
Correct option: A.
Plum pudding model
Plum pudding model
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MCQ 91 Mark
Who discovered the existence of the negatively charged particles is an atom?
  • A
    John Dalton
  • B
    Rutherford
  • C
    Neils Bohr
  • ✓
    J.J. Thomson
Answer
Correct option: D.
J.J. Thomson
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MCQ 111 Mark
One Nano metre is equal to ________
  • A
    $10^8 m$
  • B
    $10^{-9} m$
  • C
    $10^{-5} m$
  • ✓
    $10^9 m$
Answer
Correct option: D.
$10^9 m$
$10^9 m$
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MCQ 121 Mark
________ is the smallest unit used to measure small lengths.
  • A
    Metre
  • ✓
    Nanometre
  • C
    Millimetre
  • D
    Centimetre
Answer
Correct option: B.
Nanometre
Nanometre
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MCQ 131 Mark
Whose theory does not propose anything about the positive and negative charges of an atoms.
  • A
    J J. Thomson
  • ✓
    Dalton
  • C
    Rutherford
  • D
    Bohr
Answer
Correct option: B.
Dalton
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MCQ 151 Mark
________ is made up of two or more atoms.
  • A
    Atoms
  • ✓
    Molecule
  • C
    Compound
  • D
    None
Answer
Correct option: B.
Molecule
Molecule
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