Atoms And Molecules Test

Atoms And Molecules

This is Atoms and Molecules Test-03 for CBSE class 09 Science.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
What information we get from molecular formula A It represents one molecule of the substance B It does not tells the name of the substance C It tells about the type of atoms D It represents formula mass unit of one substance
  • A
    All of these
  • B
    (a) and (b) are correct
  • C
    (a), (c) and (d) are correct
    Correct
  • D
    (b) and (c) are correct
2
How many moles are present in 40 g of He?
  • A
    13 moles
  • B
    14 moles
  • C
    10 moles
    Correct
  • D
    12 moles
3
Which of the following elements are present in Quick lime?
  • A
    Calcium chloride
  • B
    Calcium, bromine
  • C
    Calcium, Oxygen
    Correct
  • D
    Sodium, Hydrogen, Oxygen
4
What is the formula of calcium phosphide?
  • A
    CaP
  • B
    \({\text{C}}{{\text{a}}_{\text{3}}}{{\text{P}}_{\text{2}}}\)
    Correct
  • C
    \({\text{CaC}}{{\text{l}}_{\text{2}}}\)
  • D
    \({\text{C}}{{\text{a}}_{\text{3}}}{\left( {{\text{P}}{{\text{O}}_{\text{4}}}} \right)_{\text{2}}}\)
5
What is the mass of 0.5 mole of Hydrogen atom
  • A
    2.0 g
  • B
    1 g
  • C
    1.5 g
  • D
    0.5 g
    Correct
6
How many atoms of Sulphur are present in 0.5 mole of\({\text{S}}{{\text{O}}_{\text{2}}}\)?
  • A
    \({\text{3}}.0{\text{12 }} \times {\text{ 1}}{0^{{\text{23}}}}{\text{ }}\)atoms
  • B
    \({\text{6}}.0{\text{12 }} \times {\text{ 1}}{0^{{\text{23}}}}{\text{ }}\)atoms
  • C
    None of these.
  • D
    \({\text{9}}.0{\text{35 }} \times {\text{ 1}}{0^{{\text{23}}}}{\text{ }}\)atoms
    Correct
7
How many moles are present in 2.3 g of Na
  • A
    2 mole
  • B
    0.1 mole
    Correct
  • C
    2/3 mole
  • D
    1 mole
8
What is the name given to\({\text{6}}.0{\text{22 }} \times {\text{ 1}}{0^{{\text{23}}}}\)?
  • A
    Mass number
  • B
    Avogadro constant
    Correct
  • C
    None of these.
  • D
    Atomic mass
9
Calculate the number of particles in 0.01 mole of carbon atoms
  • A
    \({\text{3}}.0{\text{11 }} \times {\text{ 1}}{0^{{\text{23}}}}{\text{ }}\)atoms
  • B
    None of these
  • C
    \({\text{12}}.0{\text{33 }} \times {\text{ 1}}{0^{{\text{23}}}}{\text{ }}\)atoms
  • D
    \({\text{6}}.0{\text{22 }} \times {\text{ 1}}{0^{{\text{21}}}}{\text{ }}\)atoms
    Correct
10
A sample of Ca\({\text{C}}{{\text{O}}_{\text{3}}}\)contains \({\text{3}}.0{\text{1}} \times {\text{1}}{0^{{\text{23}}}}{\text{ }}\)ions of \({\text{C}}{{\text{a}}^{ + {\text{2}}}}\)and\({\text{C}}{{\text{O}}_{\text{3}}}^{ - {\text{2}}}\). The mass of the sample is
  • A
    100g
  • B
    5g
  • C
    200g
  • D
    50g
    Correct
11
What mass of \({\text{C}}{{\text{O}}_{\text{2}}}\)will contain \({\text{3}}.0{\text{11}} \times {\text{1}}{0^{{\text{23 }}}}\)molecules?
  • A
    4.4 g
  • B
    22.0 g
    Correct
  • C
    44.0 g
  • D
    11.0 g
12
Which has maximum number of molecules?
  • A
    1 g of \({\text{C}}{{\text{H}}_{\text{4}}}\)
  • B
    1 g of \({{\text{N}}_{\text{2}}}\)
  • C
    1 g of \({\text{C}}{{\text{O}}_{\text{2}}}\)
  • D
    1 g of \({{\text{H}}_{\text{2}}}\)
    Correct
13
Calculate the number of moles in 17 g of hydrogen peroxide \(\left( {{{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}} \right){\text{ }}\)
  • A
    1 mole
  • B
    2 mole
  • C
    1/2 mole
    Correct
  • D
    3 mole
14
What weight of calcium contains the same number of atoms as are present in2 g of Sulphur?
  • A
    32 g
  • B
    4 g
    Correct
  • C
    16 g
  • D
    2 g
15
Out of 4 g of methane and 11 g of \({\text{C}}{{\text{O}}_{\text{2}}}\)which has more molecules?
  • A
    Information not sufficient.
  • B
    Both have same number of moles
    Correct
  • C
    \({\text{C}}{{\text{O}}_{\text{2}}}\)
  • D
    Methane