Class 10 Periodic Classification Of Elements CBSE Questions & Answers

Class 10 · Periodic Classification Of Elements

This is online test 02 for CBSE class 10 Science Periodic Classification of Elements.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Modern Periodic law is based upon-
  • A
    Number of neutrons
  • B
    Number of electron
  • C
    Atomic mass
  • D
    Atomic member
    Correct
2
The second ionization energy is greater than the first because
  • A
    of decreased force of attraction between the nucleus and the valence electrons
  • B
    Second electron is heavy hence it needs more energy
  • C
    None of these
  • D
    increased force of attraction between the nucleus and the valence electrons
    Correct
3
The atomic number of an element is 16 predict the nature of the element
  • A
    Metallic
  • B
    Semi metallic
  • C
    None of these
  • D
    Non metallic
    Correct
4
Which type of compound is formed by the elements of group 1 and group 7?
  • A
    covalent compound
  • B
    All of these
  • C
    Ionic compound
    Correct
  • D
    coordinate compound
5
Give the symbol for the most reactive non-metal of group 17
  • A
    F
    Correct
  • B
    I
  • C
    Br
  • D
    Cl
6
Which one has the bigger size?
  • A
    Cl
  • B
    F
  • C
    K
    Correct
  • D
    Na
7
Electronic configuration of \({\rm{A}}{{\rm{l}}^{{\rm{3}} + }}\)is-
  • A
    2, 8
    Correct
  • B
    2,8,8,3
  • C
    2, 8, 8
  • D
    2, 8, 3
8
Which of the following element forms dipositive ion very easily?
  • A
    F
  • B
    Na
  • C
    Mg
    Correct
  • D
    Cs
9
Which of the following is not the limitation of Mendeleev’s periodic table?
  • A
    There was no place for isotopes in the periodic table
  • B
    None of these
  • C
    There was no place for noble gases
  • D
    He left gaps for yet to be discovered elements
    Correct
10
What is the atomic number of the first element of the lanthanide series?
  • A
    88.0
  • B
    57.0
    Correct
  • C
    89.0
  • D
    56.0
11
Statement A : Electron affinity of fluorine is more than that of chlorine. Statement B : Carbon monoxide is an acidic oxide.
  • A
    Neither statement nor statement B is true
    Correct
  • B
    Both the Statement A and B are true
  • C
    Statement B is true, B is false
  • D
    Statement A is true, B is false
12
Statement A : energy is always released when a neutral atoms gain an electron, Statement B Tellurium and polonium are semi metals
  • A
    Statement B is true A is false
    Correct
  • B
    Neither statement A nor statement B is true
  • C
    Both the statement A and B are true
  • D
    Statement A is true, B is false
13
What is the number of valance electrons in the last element of 3rd period?
  • A
    5.0
  • B
    3.0
  • C
    8.0
    Correct
  • D
    7.0
14
Arrange the following elements in the decreasing order of their atomic radii
  • A
    \({\rm{C }} > {\rm{ L1}} > {\rm{ N }} > {\rm{ O }} > {\rm{ B }} > {\rm{ Be}}\)
  • B
    \({\rm{Li }} > {\rm{ Be }} > {\rm{ B }} > {\rm{ C }} > {\rm{ N }} > {\rm{ O}}\)
    Correct
  • C
    \({\rm{Li }} > {\rm{ Be }} > {\rm{ B }} > {\rm{ N }} > {\rm{ C }} > {\rm{ O}}\)
  • D
    \({\rm{O }} > {\rm{ N }} > {\rm{ C }} > {\rm{ B }} > {\rm{ Be }} > {\rm{ Li}}\)
15
Metallic character ____________ down a group
  • A
    decreases
  • B
    Increases
    Correct
  • C
    None of these
  • D
    remains the same in the group