Structure Of The Atoms Test

Structure Of The Atoms

This is Structure Of The Atoms Test-04 for CBSE class 09 Science.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
An example of isobars are-
  • A
    \({}_6^{16}O,{}_6^{18}O\)
  • B
    \({}_1^1H,{}_1^2H,{}_1^3H\)
  • C
    \({}_{17}^{35}Cl,{}_{17}^{37}Cl\)
  • D
    None of the above
    Correct
2
The atom which does not contain any neutron in the nucleus is
  • A
    helium
  • B
    deuterium
  • C
    tritium
  • D
    Protium
    Correct
3
Match the following with correct response. (1) Deuterium (2) Carbon-14(3) Isotope of uranium (4) Cobalt -60 (A) Radiocarbon Dating (B) Treatment of cancer (C) Nuclear Reactors (D) An isotope of Hydrogen
  • A
    1-A, 2-C, 3-B, 4-D
  • B
    1-D, 2-A, 3-C, 4-B
    Correct
  • C
    1-C, 2-B, 3-D, 4-A
  • D
    1-B, 2-D, 3-A, 4-C
4
Isotopes of an element have A Same chemical properties B Same atomic masses C Differeat atomic numbers D Atoms of same element
  • A
    (a) and (d) are correct
    Correct
  • B
    (b) and (c) are correct
  • C
    All of these
  • D
    (a), (b) and (c) are correct
5
How many electrons are present in the species \({\text{H}}{{\text{e}}^{{\text{2}} + }}\)ion?
  • A
    0
    Correct
  • B
    4
  • C
    2
  • D
    8
6
In a species, the number of electrons is more than the number of protons. Predict its nature.
  • A
    All of these
  • B
    neutral atom
  • C
    Cation
  • D
    Anion
    Correct
7
Statement A: The nature of cathode rays depends on the nature of gas taken in the discharge tube. Statement B: Cathode rays rotate a light paddle wheel placed in their path. Which of the two statements is true?
  • A
    Both the statement A and B
  • B
    statement A
  • C
    Neither statement A nor Statement B.
  • D
    Statement B
    Correct
8
0 to 7 means that outermost shell-
  • A
    5 electrons
  • B
    6 electrons
  • C
    7 electrons
  • D
    8 electrons
    Correct
9
The order of the energy of the energy shell is
  • A
    K < L < M < N < O
    Correct
  • B
    K < M < L < N < O
  • C
    L < K < M < N < O
  • D
    K < L < N < M < O
10
Which is not true about neutron?
  • A
    It is highly unstable in nature
    Correct
  • B
    It contributes to the mass of the atom.
  • C
    It is a present in the nucleus of atom.
  • D
    It is a neutral particle
11
The sum of the first 15 multiples of 8 is
  • A
    900
  • B
    960
    Correct
  • C
    1000
  • D
    870
12
Match the following with correct response. (1) Atomic Number (2) Atomic mass (3) Isotopes (4) Isobars (A) Total number neutrons and protons (B) Different atoms with similar atomic masses (C) Same atoms with similar atomic numbers (D) Number of protons
  • A
    1-D, 2-A, 3-C, 4-B
    Correct
  • B
    1-A, 2-C, 3-B, 4-D
  • C
    1-C, 2-B, 3-D, 4-A
  • D
    1-B, 2-D, 3-A, 4-C
13
The sum of the first ‘n’ terms of an A.P. is given by
  • A
    \(\frac{n}{2}\left[ {a + (n - 1)d} \right]\)
  • B
    \(\frac{{n + 1}}{2}\left[ {2a + (n - 1)d} \right]\)
  • C
    \(\frac{n}{2}\left[ {2a + (n + 1)d} \right]\)
  • D
    \(\frac{n}{2}\left[ {2a + (n - 1)d} \right]\)
    Correct
14
Match the following with correct response. (1) Distribution of electrons (2) In a neutral atom (3) Ions (4) Molecule (A) Electronic configuration (B) Gain or loss of electrons (C) Electrons are always equal to protons (D) Stable
  • A
    1-C, 2-B, 3-D, 4-A
  • B
    1-D, 2-A, 3-C, 4-B
  • C
    1-A, 2-C, 3-B, 4-D
    Correct
  • D
    1-B, 2-D, 3-A, 4-C
15
In \({K^ + }\)and \({K^ - }\) A Number of electrons are same B Number of protons are same C Number of neutrons are same D Number of shells are same
  • A
    (a) and (b) are correct
  • B
    All of these
  • C
    (a), (b) and (c) are correct
  • D
    (b) and (c) are correct
    Correct