Atoms And Molecules Test

Atoms And Molecules

This is Atoms and Molecules Test-01 for CBSE class 09 Science.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Who suggested that if we go on dividing matter, a stage will come when particles obtained can’t be divided further?
  • A
    Joseph L Proust
  • B
    None of these
  • C
    Democritus and Leucippus
    Correct
  • D
    Antoine L Lavoisier
2
Atom of Hydrogen is
  • A
    \({\text{1}}{0^{ - {\text{1}}}}\)m
  • B
    \({\text{1}}{0^{ - {\text{8}}}}\)m
  • C
    \({\text{1}}{0^{ - {\text{9}}}}\)m
  • D
    \({\text{1}}{0^{ - {\text{1}}0}}\)m.
    Correct
3
Who was the first to use the symbols for elements?
  • A
    Dalton
    Correct
  • B
    Antoine L Lavoisier
  • C
    Joseph L Proust
  • D
    Berzillius
4
What is the Latin name of Potassium?
  • A
    Ferrum
  • B
    Kalium
    Correct
  • C
    None of these
  • D
    Natrium
5
How many atoms are present in \({\text{P}}{{\text{O}}_{\text{4}}}^{ - {\text{3}}}\)ion?
  • A
    5
    Correct
  • B
    3
  • C
    4
  • D
    1
6
What is the name given to the short hand representation of an element?
  • A
    Symbol
    Correct
  • B
    Equation
  • C
    All of these
  • D
    Chemical formula
7
What is the latin name of sodium?
  • A
    Natrium
    Correct
  • B
    Kalium
  • C
    Plumbum
  • D
    None of these
8
Argentum is the Latin name of
  • A
    Silver
    Correct
  • B
    Tungsten
  • C
    Antimony
  • D
    Sodium
9
The formula of a compound is \({\text{C}}{{\text{a}}_{\text{3}}}\)\({\left( {{\text{P}}{{\text{O}}_{\text{4}}}} \right)_{\text{2}}}\). What is the valency of Ca in it?
  • A
    4
  • B
    2
    Correct
  • C
    0
  • D
    3
10
Phosphorus is a
  • A
    Diatomic
  • B
    Monatomic
  • C
    Triatomic
  • D
    Tetra-atomic
    Correct
11
How many times an atom Sulphur is heavier than an atom of carbon?
  • A
    3/2 times
  • B
    12 times
  • C
    12/321 times
  • D
    8/3 times
    Correct
12
What is the atomicity of ammonia?
  • A
    3
  • B
    4
    Correct
  • C
    0
  • D
    2
13
An element X has valency 3 while the element Y has valency 2 write the formula of the compound between X and Y.
  • A
    XY
  • B
    \({{\text{X}}_{\text{3}}}{{\text{Y}}_{\text{3}}}\)
  • C
    \({{\text{X}}_{\text{2}}}{{\text{Y}}_{\text{3}}}{\text{ }}\)
    Correct
  • D
    \({{\text{X}}_{\text{2}}}{{\text{Y}}_{\text{2}}}\)
14
An element A forms an oxide with formula \({{\text{A}}_{\text{2}}}{{\text{O}}_{\text{3}}}\). What is its valency?
  • A
    1
  • B
    3
    Correct
  • C
    4
  • D
    2
15
Match the following with correct response. (1) Ozone(2) Helium(3) Oxygen (4) Phosphorous (A) Monoatomic (B) Tetra atomic (C) Diatomic (D) Triatomic
  • A
    1-D, 2-A, 3-C, 4-B
    Correct
  • B
    1-A, 2-C, 3-B, 4-D
  • C
    1-B, 2-D, 3-A, 4-C
  • D
    1-C, 2-B, 3-D, 4-A