MCQ on 10 science part -1 Topic-2 periodic Classification of elements MCQ

1 ) Elements are classified as ……………
A ) Metals
B ) Non-metals
C ) Metalloids
D ) All of the above
Ans D ) All of the above

2 ) Which is odd among the following ?
A ) Li
B ) Sr
C ) K
D ) Na
Ans B ) Sr

3 ) Ca, Sr, Ba : Triad II :: …………… : Triad I
A ) Li, Sr, I
B ) Li, Br, Cl
C ) Li, Na, K
D ) Cl, Br, I
Ans C ) Li, Na, K

4 ) Who is known as father of periodic table?
A ) Newlands
B ) Dobereiner
C ) Mendeleev
D ) Henry Moseley
Ans C ) Mendeleev

5 ) Mendeleev arranged …………… elements in increasing order of their atomic masses.
A ) 36
B ) 56
C ) 63
D ) None of these
Ans C ) 63

6 ) Find odd man out.
A ) Carbon                                                                                                   B ) Nitrogen
C ) Oxygen
D ) Sulphur
Ans D ) Sulphur

7 ) Neon : Inert gas : : Bromine : ……………
A ) Alkali metal
B ) Halogen
C ) Alkali earth metal
D ) Transition elements
Ans B ) Halogen

8 ) Atomic size goes on …………… while going down a group.
A ) Increasing
B ) Decrasing
C ) Remain same
D ) None of these
Ans A ) Increasing

9 ) Given K = 2,8,8,1 Answer the following : symbol K stands for which element ?
A ) Potassium
B ) Kennel
C ) Pure kennel
D ) None of these
Ans A ) Potassium

10 ) …………… is the combining capacity of an element.
A ) Valency
B ) Atomic radius
C ) Atomic size
D ) None of these
Ans A ) Valency

11 ) Newlands fitted all the known elements in …………… boxes.
A ) 50
B ) 54
C ) 56
D ) 60
Ans C ) 56

12 ) Given K = 2,8,8,1 ,To which period does it belong?
A ) Period 1
B ) Period 2
C ) Period 3
D ) Period 4
Ans D ) Period 4

13 ) Given K = 2,8,8,1
Name of the group to which it belongs.
A ) Halogens
B ) Noble gases
C ) Alkali metals
D ) Transition elements
Ans C ) Alkali metals

14 ) Second period : 2 shells : : Third period : ……………
A ) s shells
B ) 3 shells
C ) 4 shells
D ) 5 shells
Ans B ) 3 shells

15 ) Which Statement is true for Dobereiner’s law of triads?
A ) Properties of elements are related to their atomic masses
B ) Elements were arranged in groups of three, each having similar chemical properties
C ) The atomic mass of the middle element was approximately equal to the mean of atomic masses of the other two elements
D ) All of the above
Ans D ) All of the above

16 ) Isotopes have same …………… properties
A ) Physical
B ) Chemical
C ) Both 1 and 2
D ) None of these
Ans B ) Chemical

17 ) ……………. is a metalloid
A ) Sodium
B ) Arsenic
C ) NeonD ) Iodine
Ans B ) Arsenic

18 ) 1 period : shortest : : 6 period : ……………
A ) Small
B ) Longest
C ) Detailed
D ) None of these
Ans B ) Longest

19 ) Electronic configuration of calcium.
A ) 2,8,8,1
B ) 2,8,8,3
C ) 2,8,10
D ) 2,8,8,2
Ans D ) 2,8,8,2

20 ) The third period contain only 8 elements due to ……………
A ) Law of triads
B ) Law of octaves
C ) Law of electron octet
D ) None of these
Ans C ) Law of electron octet

21 ) The third period has only …………… elements
A ) 2
B ) 8
C ) 18
D ) 32
Ans B ) 8

22 ) Find the odd one among the following
A ) Germanium
B ) Silicon
C ) Scandium
D ) Gallium
Ans B ) Silicon

23 ) Which one is odd among the following?
A ) B and Al
B ) O and SC ) Be And Mg
D ) N and S
Ans D ) N and S

24 ) Fluorine : Second period : : chlorine : ……………
A ) First period
B ) Second period
C ) Third period
D ) Fourth period
Ans C ) Third period

25 ) Which statement tells us about the limitations of Dobereiner’s law of triad.
A ) It did not hold true for all elements
B ) Properties of elements grouped into triad were not similar to each other
C ) Both 1 and 2
D ) None of these.
Ans C ) Both 1 and 2

 

26 ) Valency is determined by ……………
A ) Protons in nucleus
B ) Neutrons in nucleus
C ) Valence electron
D ) Total electrons
Ans C ) Valence electron

27 ) Electrons revolve around the nucleus in ……………
A ) Shells
B ) Skates
C ) Planes
D ) None of these
Ans A ) Shells

28 ) Newlands arranged the elements starting from …………… and ended with ……………
A ) Hydrogen, Thorium
B ) Lithium, Thorium
C ) Hydrogen, calcuim
D ) Sodium , Thorium         Ans A ) Hydrogen, Thorium

29 ) 5 period : number of elements 18 : : 6 period : ……………
A ) 2 elements8 elements
C ) 32 elements
D ) None of these
Ans C ) 32 elements

30 ) Find the odd one.
A ) Electrons
B ) Lanthanides
C ) Protons
D ) Neutrons
Ans B ) Lanthanides

31 ) Atomic radius is expressed in unit ……………
A ) Nano meter
B ) Pico meter
C ) Milli meter
D ) Light year.
Ans B ) Pico meter

32 ) Which given statement represent merit of Mendeleev’s Periodic table?
A ) Table had vacant places for undiscovered elements
B ) A ‘Zero group’ was created for noble gases without disturbing original Periodic table
C )
Atomic masses of some elements was revised to give them proper place in the periodic
table as per their properties
D ) All of the above.
Ans D ) All of the above.

33 ) Vertical column : Groups : : Horizontal rows : ……………
A ) Periods
B ) Boxes
C ) Columns
D ) Bars
Ans A ) Periods

34 ) The distance between the nucleus of atom and it outer most shell is called.
A ) Atomic number
B ) Atomic mass
C ) Atomic radius
D ) None of these
Ans C ) Atomic radius

35 ) Which was the limitation of Newlands law of octave?
A ) It did not have the provision to accommodate the newly discovered elements
B ) Law was applicable only upto calcium
C ) Elements with different properties were placed under the same note in octave.
D ) All of the above.
Ans D ) All of the above.

36 ) The sub atomic particle is …………….
A ) Electron
B ) Proton
C ) Neutron
D ) All of the above
Ans D ) All of the above

37 ) 1 pico meter = …………… m
A ) 10 m
B ) 10 m
C ) 10 m
D ) 10 m
Ans B ) 10 m

38 ) Given K = 2,8,8,1, Answer the following : what is its atomic number ?
A ) 2
B ) 8
C ) 1
D ) 19
Ans D ) 19

39 ) Given K = 2,8,8,1 , Answer the following : To which group does it belong ?
A ) Group 1
B ) Group 2
C ) Group 8
D ) Group 18
Ans A ) Group 1

40 ) Law of octaves was found to be applicable upto …………… element.
A ) Calcium
B ) Copper
C ) Cobalt
D ) Chlorin              Ans A ) Calcium


41 ) Which of the following is not a transition element?
A ) Beryllium
B ) Cobalt
C ) Copper
D ) Nickel
Ans A ) Beryllium


42 ) Find the odd one.
A ) Hydrogen
B ) Helium
C ) Neon
D ) Argon
Ans A ) Hydrogen


43 ) Which statement depicts the demerits of Mendeleev’s Periodic table.
A ) It could not justify position of certain elements, rare earths and isotopes
B )
The elements arranged in increasing order of atomic masses but the rise in atomic
mass was not uniform
C )
It was not possible to predict, the number of elements which could be discovered
between two heavy elements
D ) All of the above
Ans D ) All of the above


44 ) These elements were placed in the same box in Newlands octave.
A ) Co and La
B ) Co and Ni
C ) Ce and Ni
D ) Co and Ce
Ans B ) Co and Ni


45 ) Atomic radius goes on …………… while going from left to right within a period.
A ) Increasing
B ) Decreasing
C ) Remain same
D ) None of these
Ans B ) Decreasing


46 ) Around year 1800 only about …………… elements were known.
A ) 15
B ) 30
C ) 45
D ) 60
Ans B ) 30


47 ) Which statement is true for lithium and sodium ?
A ) Both belong to same group
B ) Both are metals
C ) Both have same valence electron
D ) All of these
Ans D ) All of these


48 ) Which statement is true for Newlands law of octaves.
A ) Elements are arranged in increasing order of their atomic masses
B ) Every eighth element had properties similar to those of the first
C ) It was similar to musical scale where every eighth note is similar to the first note
D ) All of the above
Ans D ) All of the above


49 ) An element has only …………… type of atoms.
A ) One
B ) Two
C ) Three
D ) Four
Ans A ) One


50 ) Across a period …………… electron increases by …………… , while down the group remain ……………
A ) Valence, two,same
B ) Valence,one,same
C ) Valence,three,same
D ) None of these
Ans B ) Valence,one,sam

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