TS 10th Class Physical Science Bits Chapter 7 Classification of Elements- The Periodic

These TS 10th Class Physical Science Bits with Answers Chapter 7 Classification of Elements- The Periodic will help students to enhance their time management skills.

TS 10th Class Physical Science Bits Chapter 7 Classification of Elements- The Periodic

Question 1.
The clement which has the highest ionization energy: ( )
(A) carbon
(B) nitrogen
(C) boron
(D) oxygen
Answer:
(B) nitrogen

Question 2.
The property of attracting the bonded electron pair more towards it called ( )
(A) electro positivity
(B) electro negativity
(C) electron affinity
(D) ionization potential
Answer:
(B) electro negativity

Question 3.
The region as tong form periodic table where most of the non-metals se present ( )
(A) s block
(B) d block
(C) f block
(D) p block
Answer:
(D) p block

Question 4.
The element which has the property et losing an electron to a greater extent is: ( )
(A) Be
(B) Li
(C) F
(D) O
Answer:
(B) Li

Question 5.
The elements which have completely Idled orbits before the outen noel orbit are called: ( )
(A) transition elements
(B) representative elements
(C) sines transition elements
(D) dissimilar elements
Answer:
(A) transition elements

Question 6.
Law of octaves was first proposed by: ( )
(A) Dobereiner
(B) John Newlands
(C) Mendeleef
(D) Mosely
Answer:
(B) John Newlands

Question 7.
The property of an atom to lose electrons and form a Cation : ( )
(A) electronegativity
(B) electron affinity
(C) electrosensitivity
(D) ionization energy
Answer:
(C) electrosensitivity

Question 8.
The element of third period which has the highad electro-positivity ( )
(A) sodium
(B) fluorine
(C) chlorine
(D) phosphorous
Answer:
(A) sodium

Question 9.
The order of electronegative values is ( )
(A) F<N<O<C
(B) F>N<O>C
(C)F>N>O>C
(D)F>N>ONC
Answer:
(B) F>N<O>C

Question 10.
The ionization energy from top to bottom in a group ……………………… . ( )
(A) decreases
(B) increases
(C) doesn’t change
(D) either increases or decreases
Answer:
(A) decreases

Question 11.
The element that has highest electro positivity: ( )
(A) fluorine
(B) Ceciuns
(C) Helium
(D) Hydmgen
Answer:
(B) Ceciuns

Question 12.
The factor that increases the electropositivity: ( )
(A) large number of valence electron
(B) large size of atom
(C) highest electronegativity
(D) smallest size et en atom
Answer:
(B) large size of atom

Question 13.
A liquid non metal at room temperature: ( )
(A) Mercury
(B) Chiodne water
(C) Boron
(D) Bromine
Answer:
(D) Bromine

Question 14.
The electronic configuration that indicates metallic character ( )
(A) 2, 8, 5
(B) 2, 8, 4
(C) 2, 7
(D) 2, 8, 2
Answer:
(D) 2, 8, 2

Question 15.
The most abundant element In the earth crust. ( )
(A) Aluminium
(B) Copper
(C) Nickel
(D) Iron
Answer:
(A) Aluminium

Question 16.
The maximum number of elements present In fifth period : ( )
(A) 2
(B) 8
(C) 18
(D) 32
Answer:
(C) 18

Question 17.
All the elements In a group possess : ( )
(A) same valency
(B) some atomic number
(C) same electronic configuration
(D) same chemical reactivity
Answer:
(A) same valency

Question 18.
A transition element among the following : ( )
(A) Ca
(B) Cu
(C) Zn
(D) As
Answer:
(B) Cu

Question 19.
The atomic size in a period from left to right. ( )
(A) Increases
(B) decreases
(C) doesn’t change
(D) at first decreases and then increases
Answer:
(B) decreases

Question 20.
The minimum energy required to remove an election from the outermost orbital of gaseous atom. ( )
(A) Ionization potential
(B) Electron affinity
(C) Electro positivity
(D) Electro negativity
Answer:
(A) Ionization potential

Question 21.
The elements belonging to groups from III A to VII A are called: ( )
(A) s block elements
(B) p block elements
(C) d block elements
(D) f block elements
Answer:
(B) p block elements

Question 22.
Unit of atomic radius : ( )
(A) micrometer
(B) nano meter
(C) millimeter
(D) picometer
Answer:
(D) picometer

Question 23.
Pauling assigned the electronegativity values for elements on the basis of ()
(A) bond energies
(B) bond lengths
(C) Ionic bonds
(D) bond angles
Answer:
(A) bond energies

Question 24.
As we move from top to bottom in a group the metallic character: ( )
(A) decreases
(B) Increases
(C) doesn’t change
(D) first decreases then increase
Answer:
(B) Increases

Question 25.
Electron affinity values of elements in modem periodic table …………………….. from
top to bottom : ( )
(A) decrease
(B) increase
(C) do not change
(D) none of these
Answer:
(A) decrease

Question 26.
The atomic size of Na is than that of Na’ Ion : ( )
(A) less
(B) equal
(C) greater
(D) none of these
Answer:
(C) greater

Question 27.
More than 75% of the elements in the long-form periodic table are ( )
(A) non-metals
(B) halogens
(C) rare earth metals
(D) metals
Answer:
(D) metals

Question 28.
The distance between the nuclei of two atoms in a covalent molecule Is taken as ( )
(A) bond length
(B) bond distance
(C) atomic radius
(D) diameter of atom
Answer:
(C) atomic radius

Question 29.
Valeney of ‘Ca’ is ( )
(A) 1
(B) 2
(C) 3
(D) 4
Answer:
(B) 2

Question 30.
The modem periodic table is organized on the basis of ( )
(A) atomic weights
(B) atomic volumes
(C) atomic numbers
(D) electronic configurations
Answer:
(D) electronic configurations

Question 31.
Identify the Dobereiner’s tripod among: ( )
(A) F, Cl, I
(B) Li, Na, K
(C) S, Si, Te
(D) Ca, Ba, Mg
Answer:
(B) Li, Na, K

Question 32.
The horizontal rows in a periodic table are known as: ( )
(A) groups
(B) series
(C) periods
(D) blocks
Answer:
(C) periods

Question 33.
Mendeleef’s eka-boron was named as after its discovery : ( )
(A) scandium
(B) gallium
(C) germanium
(D) aluminum
Answer:
(A) scandium

Question 34.
Elements from Li to Fr with outer shell electronic configuration ns¹ are called ( )
(A) alkaline earth metal family
(B) alkali metal family
(C) noble metal family
(D) radioactive & family
Answer:
(B) alkali metal family

Question 35.
The period which is In complete in modem periodic table: ( )
(A) 6th perIod
(B) 7th period
(C) 1st period
(D) 3rd period
Answer:
(B) 7th period

Question 36.
Elements belonging to ‘4f’ block are called: ( )
(A) actinoids
(B) metalloids
(C) noble metals
(D) lanthanoids
Answer:
(D) lanthanoids

Question 37.
The atomic size in a group from top to bottom ………………….. .
(A) decreases
(B) does not change
(C) at first decreases and then increases
(D) increases
Answer:
(D) increases

Question 38.
Identify the metal among :
(A) graphite
(B) phosphorus
(C) sodium
(D) Diamond
Answer:
(C) sodium

Question 39.
The element that has the greatest nature of losing an electron :
(A) Be
(B) Li
(C) F
(D) O
Answer:
(B) Li

Question 40.
The element that has only one ionization potential is: ( )
(A) hydrogen
(B) sodium
(C) helium
(D) Inert gas elements
Answer:
(A) hydrogen

Question 41.
Elements having (n-1)d^1-10ns³ outermost electronic configuration are called : ( )
(A) transition elements
(B) Inert gas elements
(C) representative elements
(D) Inner transition elements
Answer:
(A) transition elements

Question 42.
The lightest metal among the following : ( )
(A) Na
(B) Mg
(C) Ag
(D) Li
Answer:
(D) Li

Question 43.
Removal of oxygen from a compound is ( )
(A) reduction
(B) oxidation
(C) precipitation
(D) evaporation
Answer:
(A) reduction

Question 44.
The least electro-positive element ( )
(A) oxygen
(B) cesium
(C) fluorine
(D) hydrogen
Answer:
(C) fluorine

Question 45.
AlumInium is a metal belonging to III group of periodic table. So the formula of its oxide is: ( )
(A) AlO₃
(B) Al₃O
(C) Al₂O₃
(D) Al₃O₂
Answer:
(C) Al₂O₃

Question 46.
Electronegativity is represented on: ( )
(A) pH scale
(B) Pauling’s scale
(C) Pitch scale
(D) Mulliken scale
Answer:
(B) Pauling’s scale

Question 47.
The general configuration of inert gases is: ( )
(A) ns²np⁴
(B) ns²
(C) ns²np⁶
(D) ns²np⁵
Answer:
(C) ns²np⁶

Question 48.
From left to right in a period the reducing property gradually: ( )
(A) increases
(B) decreases
(C) doesn’t change
(D) may Increase or decrease
Answer:
(B) decreases

Question 49.
The reagent used to reduce a compound is called ………………….. . ()
(A) oxidizing agent
(B) catalyst
(C) flux
(D) reducing agent
Answer:
(D) reducing agent

Question 50.
The element that has the electronic configuration [Ne] 3s²3p⁵ is ( )
(A) Argon
(B) Chlorine
(C) Bromine
(D) Phosphorus
Answer:
(B) Chlorine

Question 51.
Elements having atomic numbers from 58 to 71 are called : ( )
(A) representative elements
(B) inert gases
(C) actinoids
(D) lanthanoids
Answer:
(D) lanthanoids

Question 52.
As we go down a group the electron enthalpy values …………………….. . ( )
(A) decrease
(B) increase
(C) do not change
(D) may increase to Large extent
Answer:
(A) decrease

Question 53.
It is easier to remove one electron from,O than ₇N because Nitrogen has ( )
(A) one unpaired electron in its outer shell
(B) stable half-filled configuration
(C) three completely filled orbitals
(D) no unpaired electron in its configuration
Answer:
(B) stable half-filled configuration

Question 54.
IonizatIon energy of an element depends on: ( )
(A) nuclear charge
(B) screening effect
(C) atomic radius
(D) stable configuration
Answer:
(A) nuclear charge
(B) screening effect
(C) atomic radius
(D) stable configuration

Question 55.
Electron affinity involves : ( )
(A) liberation of energy
(B) gain of energy
(C) decrease In atomic size
(D) none
Answer:
(A) liberation of energy

Question 56.
In dobereiner’s triad, the atomic weight of middle element is: ( )
(A) the sum of the atomic weights of 1st and 3rd elements
(B) the product of the atomic weights of 1st and 3rd elements
(C) the average of the atomic weights of the 1st and 3rd elements
(D) the difference of the atomic weights of the 1st and 3rd elements
Answer:
(C) the average of the atomic weights of the 1st and 3rd elements

Question 57.
The earliest classification of elements is attempted by : ( )
(A) John Newland
(B) Moseley
(C) Lother Mayor
(D) Dobereiner
Answer:
(D) Dobereiner

Question 58.
The atomic number of an element corresponds to: ( )
(A) number of shells in the atom
(B) number of positive charges
(C) number of neutrons in the atom
(D) atomic mass
Answer:
(B) number of positive charges

Question 59.
Metallic natures increases with Increase in ………………………….. . ( )
(A) electro negativity
(B) electro positivity
(C) number of neutrons
(D) none of these
Answer:
(B) electro positivity

Question 60.
Except the following inert gas all the others have octet confIguration: ( )
(A) Ne
(B) Xe
(C) Rn
(D) He
Answer:
(D) He

Question 61.
Electronegativity depends on ………………….. . ( )
(A) nature of bonded atoms
(B) atomic size
(C) nuclear charge
(D) all of A, B, C
Answer:
(D) all of A, B, C

Question 62.
The electron affinities of noble gases are almost: ( )
(A) high
(B) +1
(C) +4
(D) zero
Answer:
(D) zero

Question 63.
Which is the biggest ion among: ( )
(A) F^–
(B) O^-2
(C) Mg⁺²
(D) all
Answer:
(B) O^-2

Question 64.
The moving of an orbital more towards the nucleus is called: ( )
(A) displacement of orbital
(B) screening effect
(C) penetration of orbitals
(D) approach of orbital
Answer:
(C) penetration of orbitals

Question 65.
The Ionization energy is …………………….. . ( )
(A) α atomic radius
(B) α 1/atomic radius
(C) both I.E & atomic radius are not related
(D) none of these
Answer:
(B) α 1/atomic radius

Question 66.
In case of electronic affinity which of the following Is true for halogens? ( )
(A) Cl<F
(B)Br<I
(C) Cl <F
(D) Cl>F
Answer:
(D) Cl>F

Question 67.
Gallium is named by Mendeleeff as ( )
(A) eka boron
(B) eka aluminum
(C) eka silicon
(D) none of these
Answer:
(B) eka aluminium

Question 68.
Cl belongs to ……………………… family. ( )
(A) Noble gas
(B) Carbon family
(C) Halogen
(D) Boron
Answer:
(D) Boron

Question 69.
lE₂ ………………………… lE₁ ( )
(A)>
(B) < (C) = (D) none Answer: (A)>

Question 70.
Identify the metalloid: ( )
(A) Silicon
(B) Na
(C) Carbon
(D) Fe
Answer:
(A) Silicon

Question 71.
Which group of the penodic table contains maximum elements ( )
(A) Third
(B) Eighth
(C) Seventeenth
(D) Eighteenth
Answer:
(A) Third

Question 72.
Elements belonging to the same period have ( )
(A) same valency electrons
(B) same number of shells
(C) same atomic size
(D) same electron affinity
Answer:
(B) same number of shells

Question 73.
Which of the following parameter decreases moving down In a group
(A) size of atom
(B) ionization energy
(C) chemical reactIvity
(D) metallic character
Answer:
(B) ionization energy

Question 74.
Gallium is named as …………………… my Mendeleeff.
(A) Eka Boron
(B) Eka Silicon
(C)Eka Aluminium
(D) None
Answer:
(D) None

Question 75.
Which of the following Is not a Doberelner mad ( )
(A) Li, Na, K
(B) Ci, Br, I
(C) Ca, Sr, Ba
(D) B, Be, C
Answer:
(D) B, Be, C

Question 76.
Modem periodic table Is classified on the basis of ( )
(A) atomic size
(B) atomic mass
(C) atmic number
(D) density
Answer:
(C) atmic number

Question 77.
Name given to IV group element family is ………………….. . ( )
(A) Alkali family
(B) Boron family
(C) Carbon family
(D) Oxygen family
Answer:
(C) Carbon family

Question 78.
Valency of chlorine is …………………….. . ( )
(A) 1
(B) 2
(C) 3
(D) 4
Answer:
(A) 1

Question 79.
Most electropositive element is ……………………. . ( )
(A) Hydrogen
(B) Fluorine
(C) Barium
(D) Cesium
Answer:
(D) Cesium

Question 80.
Number of elements in 6th period of modem periodIc table is ……………….. . ( )
(A) 8
(B) 18
(C) 32
(D) 2
Answer:
(C) 32

Question 81.
………………………. block elements are called as lanttianides and actinides in modern
periodic table. ( )
(A) s
(B) p
(C) f
(D) d
Answer:
(C) f

Question 82.
5f elements are called ……………………… . ( )
(A) actinides
(B) larithanides
(C) transition elements
(D) representative elements
Answer:
(A) actinides

Question 83.
Noble gases belongs to …………………… group of periodic table. ( )
(A) 7th group
(B) 1st group
(C) 0 group
(D) 0 group or 18th group
Answer:
(D) 0 group or 18th group

Question 84.
Law of octaves was proposed by ………………………… . ( )
(A) James Wolfgand Dobemeir
(B) Mosley
(C) Demetre Mendeleef
(D) John Newlands
Answer:
(D) John Newlands

Question 85.
Mendeleeff’s classification Is based on …………………………. of an element. ( )
(A) atomic weight
(B) atomic mass
(C) atomic number
(D) atomic volume
Answer:
(A) atomic weight

Question 86.
Number of periods In Mendeleeff’s periodic table ………………………… . ( )
(A) 5
(B) 7
(C) 9
(D) 6
Answer:
(B) 7

Question 87.
The physical and chemical properties of an atom depends on its ……………………. . ( )
(A) atomic number
(B) atomic weight
(C) atomic volume
(D) size of the atom
Answer:
(A) atomic number

Question 88.
Periods are based on the ………………….. present in an atom. ( )
(A) electrons
(B) no.of orbitals
(C) no.of main shells
(D) colours
Answer:
(C) no.of main shells

Question 89.
4f elements are called …………………… . ( )
(A) s-block
(B) transition
(C) inner transition
(D) inert gases
Answer:
(C) inner transition

Question 90.
The element Mn belongs to ……………………… block. ( )
(A) s
(B) p
(C) d
(D) I
Answer:
(C) d

Question 91.
The atomic radius of Cl^– ……………………….. than Cl atom. ( )
(A) lesser
(B) greater
(C) equal
(D) does not exist
Answer:
(B) greater

Question 92.
The energy required to remove an electron from unipositive Ion is called ( )
(A) first ionization energy
(B) second Ionization energy
(C) electropositivity
(D) atomic energy
Answer:
(B) second Ionization energy

Question 93.
The energy liberated when an electron is added to a neutral gaseous atom Is known as …………………………. ( )
(A) ionisation energy
(B) electronegativity
(C) electron affinity
(D) reactivity
Answer:
(C) electron affinity

Question 94.
According to Milliken, electronegativity = ( )
(A) \(\frac{\text { I.E. }+\text { E.A. }}{2} \)
(B) I.E. + E.A.
(C) 2(I.E. + E.A.)
(D) 2I.E + E.A
Answer:
(A) \(\frac{\text { I.E. }+\text { E.A. }}{2} \)

Question 95.
The most electronegative element is ……………………. . ( )
(A)Al
(B)F
(C)Cl
(D)Ne
Answer:
(B)F

Question 96.
Metals are at …………………… side of the periodic table. ( )
(A) left
(B) top
(C) bottom
(D) right
Answer:
(A) left

Question 97.
………………………. cannot be decomposed Into further substance by a physical or chemical
change. ( )
(A) Atom
(B) Molecule
(C) Element
(D) Compound
Answer:
(C) Element

Question 98.
In Doberelner triad, the atomic mass of the middle elements Is the ……………………. of the atomic masses of the other two elements. ( )
(A) sum
(B) product
(C) difference
(D) average
Answer:
(D) average

Question 99.
Newlands octaves first clement resembles ( )
(A) 2nd elemçnt
(B) 8th element
(C) 3rd element
(D) 7th element
Answer:
(B) 8th element

Question 100.
Newlands’ dissimilar elements are ( )
(A) Copper & Cobalt
(B) tin & nickel
(C) Coblat & nickel
(D) tin & Cobalt
Answer:
(C) Coblat & nickel

Question 101.
Vertical Columns of Mendeleeff are called …………………….. . ( )
(A) groups
(B) periods
(C) blocks
(D) elements
Answer:
(A) groups

Question 102.
Mendeleeff divided the elements In ……………………… groups. ( )
(A) 6
(B) 9
(C) 12
(D) 8
Answer:
(B) 9

Question 103.
Eka means …………………….. .( )
(A) three
(B) eleven
(C) one
(D) none
Answer:
(C) one

Question 104.
Mendeleeff tried to explain similarities of elements in the same group by using their ( )
(A) valency
(B) configuration
(C) weight
(D) mass
Answer:
(A) valency

Question 105.
The number of positive charges in the atom & an element is the of …………………. the element. ( )
(A) atomic rvumber
(B) atomic mass
(C) atomic weight
(D) atomic volume
Answer:
(A) atomic number

Question 106.
Modern periodic table is based on …………………. . ( )
(A) electronic Configuration
(B) colour of elements
(C) physical feats of elements
(D) chemical properties of elements
Answer:
(A) electronic Configuration

Question 107.
Modern periodic table consists of ………………………… periods and groups.
(A) 7, 16
(B) 7, 18
(C) 18, 7
(D) 16, 7
Answer:
(B) 7, 18

Question 108.
1st period contains …………………….. elements. ( )
(A) 18
(B) 8
(C) 2
(D) 18
Answer:
(C) 2

Question 109.
The group elements are also called as ………………………. . ( )
(A) groups
(B) element family
(C) actinoids
(D) blocks
Answer:
(B) element family

Question 110.
Elements from ₅₈Ce to ₇₁Lu are called ………………………. . ( )
(A) lanthanoids
(B) actinoids
(C) inert gases
(D) transition elements
Answer:
(A) lanthanoids

Question 111.
The elements with five or more electrons In the outer shell are considered as ……………….. . ( )
(A) metals
(B) gases
(C) non-metals
(D) liquids
Answer:
(C) non-metals

Question 112.
The elements which have properties that are intermediate between the properties of metals and non-metals are called …………………………… . ( )
(A) metalloids
(B) solids
(C) liquids
(D) gases
Answer:
(A) metalloids

Question 113.
…………………… block elements are only metals. ( )
(A) s
(B) p
(C) d
(D) f
Answer:
(A) s

Question 114.
………………………….. of an element was defined as combining power of an element with respect of hydrogen and oxygen. ( )
(A) oxidation
(B) reduction
(C) valence
(D) reactivity
Answer:
(C) valence

Question 115.
The valency of group, VII is ………………….. . ( )
(A) 3
(B) 1
(C) 2
(D) 0
Answer:
(B) 1

Question 116.
Atomic radii of elements across a period from left to right. ( )
(A) decrease
(B) increase
(C) no change
(D) can’t say
Answer:
(A) decrease

Question 117.
Electron affinity of chlorine ( )
(A) 349 K.J.mol^-1
(B) -349 K.J.mol^-1
(C) 289 K.J.mol^-1
(D) -289 K.J mol^-1
Answer:
(B) -349 K.J.mol^-1

Question 118.
The relative tendency of its atom to attract electrons towards It when It is bounded to the atom of another element is called …………………………… . ( )
(A) electron affinity
(B) electro positivity
(C) electro negativity
(D) ionization energy
Answer:
(C) electro negativity

Question 119.
……………………….. scales are used to measure electronegative values. ( )
(A) Pauling and Milliken
(B) Bohr & Mithken
(C) Mendeleef and Bohr
(D) Rutherford & Milliken
Answer:
(A) Pauling and Milliken

Question 120.
……………………… generally, show less electronegative character. ( )
(A) Solutions
(B) Gases
(C) Metals
(D) Non-metals
Answer:
(C) Metals

Question 121.
The metallic character …………………. while non-metallic character ………………….. along
a period.
(A) decrease, increase
(B) Increase, decrease
(C) increase, increase
(D) decrease, decrease
Answer:
(A) decrease, increase

Question 122.
Si and Ge are ………………………….. .
(A) metals
(B) non-metals
(C) metalloids
(D) liquids
Answer:
(C) metalloids

Question 123.
A Dobereiner’s Triad in the following is ……………………. . ( )
(A) Cl, Br, I
(B) H, He, LI
(C) N, Na, Cl
(D) C, N, O
Answer:
(A) Cl, Br, I