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CHEMISTRY MCQ

Atomic Structure and Chemical Bonding · ICSE STD 9 (ICSE - English Medium). 6 questions.

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6 questions · timed · auto-graded

MCQ 11 Mark
When a metal atom becomes an ion:
  • ✓
    It loses electrons and is oxidised.
  • B
    It gains electrons and is reduced.
  • C
    It gains electrons and is oxidised.
  • D
    It loses electrons and is reduced.
Answer
Correct option: A.
It loses electrons and is oxidised.
It loses electrons and is oxidised.
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MCQ 21 Mark
The characteristic of an electrovalent compound is that:
  • A
    They are formed by the sharing of electrons.
  • ✓
    They are formed between metals and non-metals.
  • C
    They are formed between two non-metals.
  • D
    They often exist as a liquid.
Answer
Correct option: B.
They are formed between metals and non-metals.
They are formed between metals and non-metals.
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MCQ 31 Mark
The mass number of an atom whose unipositive ion has $10$ electrons and $12$ neutrons is :
  • A
    $22$
  • ✓
    $23$
  • C
    $21$
  • D
    $20$
Answer
Correct option: B.
$23$
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MCQ 41 Mark
Which of the following is the correct electronic configuration of potassium?
  • A
    $2,8,9$
  • B
    $8,2,9$
  • ✓
    $2,8,8,1$
  • D
    $1,2,8,8$
Answer
Correct option: C.
$2,8,8,1$
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MCQ 61 Mark
Rutherford's alpha$-$particle scattering experiment discovered
  • A
    Electron
  • B
    Proton
  • ✓
    Atomic nucleus
  • D
    Neutron
Answer
Correct option: C.
Atomic nucleus
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