10th Class Science Periodic Classification of Elements Question Bank

done Periodic Classification of Elements Total Questions - 40

• question_answer1)
  Why are elements classified?
  A)
  To enable a better understanding on fundamental properties of elements. done clear
  B)
  To find a place for each element and know about its relationship with other elements. done clear
  C)
  To understand each element in a better way based on various observations. done clear
  D)
  All of the above                   done clear
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• question_answer2)
  Three elements P, Q, R form a Dobereiner triad. The atomic weights of P and R are 35 and 127 respectively. Find the atomic weight of Q.                         
  A)
  40                                          done clear
  B)
  60            done clear
  C)
  81                                          done clear
  D)
  120 done clear
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• question_answer3)
  The arrangement of elements in the modern periodic table is based on their
  A)
  electronic configuration. done clear
  B)
  atomic size.                        done clear
  C)
  atomic number.                 done clear
  D)
  atomic mass. done clear
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• question_answer4)
  Which one of the following is a Dobereiner triad?
  A)
  C, Mg and Na    done clear
  B)
  O, N and Cl         done clear
  C)
  Li, Na and K                        done clear
  D)
  Fe, Cu, Zn done clear
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• question_answer5)
  Three elements X, Y and Z form a m Dobereiner triad. Their atomic weights are in the ratio 5 : 11 : 17. If the sum of the atomic weights of extreme elements is 176, then find the atomic weights of X, Y and Z.                
  A)

  X	Y	Z
  40	80	176

  done clear
  B)
   

  X	Y	Z
  40	88	136

  done clear
  C)
   

  X	Y	Z
  40	80	120

  done clear
  D)
   

  X	Y	Z
  80	100	120

  done clear
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• question_answer6)
  Which period is the longest in the periodic table?
  A)
  Third                                     done clear
  B)
  Fourth       done clear
  C)
  Sixth                                     done clear
  D)
  Seventh done clear
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• question_answer7)
  Which elements in the periodic table are chemically inactive?
  A)
  Representative elements done clear
  B)
  Inert gases done clear
  C)
  Transitional elements done clear
  D)
  Inner transitional elements done clear
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• question_answer8)
  Find the atomic number of an element belonging to group IA and the 3rd period in the periodic table.
  A)
  3                                             done clear
  B)
  11      done clear
  C)
  19  done clear
  D)
  20 done clear
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• question_answer9)
  Which of the given elements have incompletely filled outermost shells?
  A)
  Halogens done clear
  B)
  Transitional elements done clear
  C)
  Representative elements done clear
  D)
  Noble gases done clear
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• question_answer10)
  According to Modern periodic law, the properties of elements are the periodic functions of 'X' ; Identify 'X'.
  A)
  Atomic masses of elements. done clear
  B)
  Atomic volumes of elements. done clear
  C)
  Atomic numbers of elements. done clear
  D)
  Densities of elements. done clear
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• question_answer11)
  Which set of elements in the periodic table are called metalloids?
  A)
  Boron, silicon, germanium, arsenic done clear
  B)
  Antimony, tellurium, polonium done clear
  C)
  Aluminium, gallium, indium done clear
  D)
  Both (a) and (b) done clear
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• question_answer12)
  Which type of electrons determine the nature and type of bonds formed by an element?
  A)
  Electrons in 's' orbital done clear
  B)
  Electrons in valence shell done clear
  C)
  Electrons in 'p' orbital done clear
  D)
  Electrons in 'd' and 'f' orbitals done clear
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• question_answer13)
  As we move from left to right in a period, which of the given properties decrease?
  A)
  Atomic radius done clear
  B)
  Electropositivity done clear
  C)
  Metallic character done clear
  D)
  All of the above done clear
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• question_answer14)
  Which one of the following is a diagonally related pair?
  A)
  H, Be                                    done clear
  B)
  Na, Mg       done clear
  C)
  B, Si                                       done clear
  D)
  K, Ca done clear
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• question_answer15)
  What are the advantages of using a periodic table?
  A)
  All the elements can be seen at a glance. done clear
  B)
  Different colours represent various forms of elements. done clear
  C)
  It is easy to memorize the properties of elements. done clear
  D)
  All of the above done clear
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• question_answer16)
  Which of the given atomic numbers, relate to a metal?                   
  A)
  34                                          done clear
  B)
  36            done clear
  C)
  38                          done clear
  D)
  32 done clear
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• question_answer17)
  Which element(s) of Group-I can form basic oxides?

  (i) Li

  (ii) \[Na\]

  (iii) K

  A)
  Only (i) and (ii) done clear
  B)
  Only (ii) and (iii) done clear
  C)
  Only (i) and (iii) done clear
  D)
  (i), (ii) and (iii) done clear
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• question_answer18)
  Identify the electronic configuration of a compound formed when a metal reacts with a halogen.
  A)
  10, 18 = 28                     done clear
  B)
  12, 9 = 21         done clear
  C)
  7, 9 = 16                          done clear
  D)
  19, 17 = 36 done clear
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• question_answer19)
  An element 'P' bonds with chlorine to form an acid. Identify 'P'. 
  A)
  \[{{O}_{2}}\]                                     done clear
  B)
  \[{{H}_{2}}\]         done clear
  C)
  \[{{N}_{2}}\]                     done clear
  D)
  Ca                done clear
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• question_answer20)
  Which element is more electronegative among halogens?
  A)
  Br                                           done clear
  B)
  \[Cl\]         done clear
  C)
  F                                             done clear
  D)
  \[I\] done clear
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• question_answer21)
  Why does atomic size increase in a group?
  A)
  Due to the addition of more electrons done clear
  B)
  Due to decrease in number of protons done clear
  C)
  Due to the addition of an extra shell done clear
  D)
  All of the above done clear
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• question_answer22)
  Eka-aluminium predicted by Mendeleef is
  A)
  Scandium.                          done clear
  B)
  Gallium.           done clear
  C)
  Germanium.     done clear
  D)
  Tellurium. done clear
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• question_answer23)
  In which block, the metals are placed in the long form of periodic table?
  A)
  's' block                               done clear
  B)
  'p' block            done clear
  C)
  'd' block                               done clear
  D)
  'f' block done clear
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• question_answer24)
  Which pair of atomic numbers belong to p-block elements?
  A)
  3, 5                                        done clear
  B)
  11, 12       done clear
  C)
  4, 5                                        done clear
  D)
  7, 8         done clear
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• question_answer25)
  Element 'X' forms a chloride with the formula \[XC{{l}_{2}}\], which is a solid with high melting point. Identify X.
  A)
  Na                                         done clear
  B)
  \[Al\]       done clear
  C)
  Mg                                        done clear
  D)
  Si          done clear
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• question_answer26)
  Which pair of elements have similar chemical behaviour?
  A)
  Sodium and Aluminium done clear
  B)
  Argon and Potassium done clear
  C)
  Nitrogen and Phosphorus done clear
  D)
  Boron and Germanium done clear
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• question_answer27)
  Which of the following pairs of elements have the same number of valence electrons?
  A)
  \[Zn,O\]                              done clear
  B)
  \[Cl,S\]       done clear
  C)
  \[\text{Na,Ca}\]                              done clear
  D)
  \[C,\,Ge\] done clear
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• question_answer28)
  The ores of an element 'X' are generally found in the earth's crust and its oxides give strong alkalis. To which group does 'X' belong to?
  A)
  I A group                             done clear
  B)
  II A group          done clear
  C)
  III A group                          done clear
  D)
  IV A group          done clear
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• question_answer29)
  What is the range of atomic numbers of lanthanoid series of elements?
  A)
  90-103                                  done clear
  B)
  89-102       done clear
  C)
  58-71                                    done clear
  D)
  71-103 done clear
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• question_answer30)
  Identify the set of inert gases.
  A)
  Oxygen, nitrogen, hydrogen done clear
  B)
  Fluorine, chlorine, bromine   done clear
  C)
  Neon, argon, krypton done clear
  D)
  All of the above done clear
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• question_answer31)
  How many electrons are there in the outermost orbit of each element in IA. group?
  A)
  1                                             done clear
  B)
  2              done clear
  C)
  3                                             done clear
  D)
  7                 done clear
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• question_answer32)
  Which of the following is a transitional element?
  A)
  Pb                                          done clear
  B)
  As            done clear
  C)
  Al done clear
  D)
  Ni done clear
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• question_answer33)
  Identify the period which contains s, p, d block elements.
  A)
  2nd period         done clear
  B)
  3rd period          done clear
  C)
  4th period          done clear
  D)
  1st period done clear
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• question_answer34)
  Match the entries in Column-I with those in Column-II.

  	Column-I		Column-II
  a.	Dobereiner	1.	Electro negativity scale
  b.	Mendeleev	2.	Long form of periodic table
  c.	Neils Bohr	3.	Law of triads
  d.	Linus Pauling	4.	Law of octaves
  e.	Newland	5.	Periodic table

  A)
  a-4, b-2, c-3, d-1, e-5 done clear
  B)
  a-1, b-2, c-3, d-4, e-5 done clear
  C)
  a-3, b-5, c-2, d-1, e-4 done clear
  D)
  a-5, b-4, c-3, d-2, e-1 done clear
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• question_answer35)
  Which element contains half-filled 'd' orbital?
  A)
  Vanadium                          done clear
  B)
  Zinc               done clear
  C)
  Chromium                          done clear
  D)
  Titanium done clear
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• question_answer36)
  The three elements calcium, strontium and barium form a triad. What is the basis of this grouping?

  (i) Elements are in the increasing order of their atomic weights.

  (ii) The atomic weight of the middle element is equal to the average of the atomic weight of extreme elements.

  (iii) Elements in a triad have similar chemical properties.

  A)
  Only (i) and (ii) done clear
  B)
  Only (ii) and (iii) done clear
  C)
  Only (i) and (iii) done clear
  D)
  (i), (ii) and (iii) done clear
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• question_answer37)
  Which element is named in the honour of Fermi?
  A)
  10th                                      done clear
  B)
  50th  done clear
  C)
  100th                                    done clear
  D)
  75th done clear
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• question_answer38)
  According to Newland's law of octaves, which element is the repetition of the first element in the periodic table?                                       
  A)
  Oxygen                               done clear
  B)
  Nitrogen                             done clear
  C)
  Chlorine                              done clear
  D)
  Sulphur done clear
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• question_answer39)
  An element having atomic number 34 can be placed in which of the given group and period of the modern periodic table?
  A)
  Group 15 and 4th period done clear
  B)
  Group 16 and 5th period done clear
  C)
  Group 14 and 7th period done clear
  D)
  Group 16 and 4th period done clear
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• question_answer40)
  The elements with atomic numbers 4, 12, 20, 38, 56, 88 belong to which of the given group?
  A)
  Alkali metals done clear
  B)
  Alkaline earth metals done clear
  C)
  Inert gases done clear
  D)
  Halogens done clear
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