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NEET Chemistry MCQ
Periodic Table Mcq Neet Chemistry
Quiz 1
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Q.1
According to Periodic law of elements, the variation in properties of elements is related to their .. [ AIEEE 2003]
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a) Nuclear masses
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b) Atomic numbers
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c) Nuclear neutron-proton number ratio
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d) Atomic masses
Explanation
Answer: (b)
Q.2
Electron affinity depends on ... [ MP PMT 2002]
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a) Atomic size
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b) Nuclear charge
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c) Atomic number
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d) Atomic size and nuclear charge both
Explanation
Electron affinity decreases as the size of the atom increases and increases as the nuclear charge increases Answer: (d)
Q.3
Element with atomic number 56 belongs to which block? [ AFMC 2002]
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a) s
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b) p
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c) d
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d) f
Explanation
Answer: (a)
Q.4
Two elements whose electronegativities are 1.2 and 3.0, the bond formed between them would be ... [ MP PET 2002]
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a) Ionic
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b) Covalent
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c) Coordinate
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d)Metallic
Explanation
Answer: (a)
Q.5
Identify the incorrect match. Name IUPAC Official Name ...[NEET 2020]
(a) Unnilunium
(i) Mendelevium
(b) Unniltrium
(ii) Lawrencium
(c) Unnilhexium
(iii) Seaborgium
(d) Unununnium
(iv) Darmstadtium
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a) (c), (iii)
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b) (d), (iv)
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c)(a), (i)
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d) (b), (ii)
Explanation
Answer: (b)
Q.6
For the second period elements the correct increasing order of first ionisation enthalpy is: [ NEET 2019]
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a) Li < Be < B < C < N < O < F < Ne
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b) Li < B < Be < C < O < N < F < Ne
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c) Li < B < Be < C < N < O < F < Ne
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d) Li < Be < B < C < O < N < F < Ne
Explanation
Answer: (b)
Q.7
Eka aluminum and Eka-silicon are known as
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a) Gallium and Germanium
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b) Aluminium and Silicon
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c) Iron and Sulphur
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d) Neutron and Magnesium
Explanation
Answer: (a)
Q.8
Atomic radii of fluorine and neon in angstrom units are respectively given by .. [ IIT 1987]
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a) 0.72, 1.60
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b) 1.60, 1.60
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c) 0.72, 0.72
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d) None of these value
Explanation
Atomic radius of Neon being van der Waal's radius is higher than that of fluorine which is in fact covalent radius Answer: (a)
Q.9
Elements of the same vertical group of the periodic table have ... [ NTSE 1983]
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a) Same atomic size
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b) same electronic configuration
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c) same number of electrons in outer shell of their atoms
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d) same number of atoms
Explanation
Answer: (c)
Q.10
Californium is the member of .. [ MLNR 1987]
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a) Actinide series
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b) Alkali metals
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c) Alkaline earth metals
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d) Lanthanide series
Explanation
Atomic number of californium is 98 it is a f-block element and as it is in 7th period, it is a part of actinide series.Answer: (a)
Q.11
The lightest metal in the periodic table is ... [ AFMC 1988]
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a) Na
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b) Hg
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c) Ca
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d) Li
Explanation
Answer: (d)
Q.12
The statement that is not true for the long form of the periodic table is.. [ IIT 1988]
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a) It reflects the sequence of filling the electrons in the order or sub-energy levels s,p,d,f
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b) It helps to predict the stable valency states of the elements
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c) It reflects trans in physical and chemical properties of the elements
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d) It helps to predict the relative ionicity of the bond between any two elements
Explanation
It does not help to predict the stable valency state of elements Answer: (b)
Q.13
On moving down the group of regular elements both atomic and ionic radii increases with increasing .. [ Bihar CEE 1995]
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a) Atomic number
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b) Atomic weight
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c) Atomic mass
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d) None of these
Explanation
Answer: (a)
Q.14
The screening effect of d-electrons is .. [ CPMT 1983]
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a) Equal to p-electrons
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b) Much more than p-electrons
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c) same as f-electrons
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d) less than p-electrons
Explanation
The order of screening effect is s > p > d > f Answer: (d)
Q.15
The electronic configuration of an element is 1s2 2s2 2p6 3s2 3pWhat is the atomic number of the element which is just-below the above element in the periodic table? [ CBSE PMT 1995]
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a) 33
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b) 34
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c) 31
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d) 49
Explanation
Given configuration atomic number is 15 which is in third period Thus required element is in fourth period=15 + 18=33 Answer: (a)
Q.16
Which element has the greatest tenancy to lose electrons? [ NCERT 1980]
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a) F
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b) S
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c) Fe
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d) Be
Explanation
Fe is most metallic in given options Answer: (c)
Q.17
The long form of the periodic table consists of .. [ CPMT 1986]
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a) 8 horizontal and 7 vertical series
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b) 7 horizontal and 18 vertical series
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c) 7 horizontal and 7 vertical series
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d) 8 horizontal and 8 vertical series
Explanation
Answer: (b)
Q.18
Which of the following gas greater tendency to lose electrons .. [ BIT 1987]
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a) F
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b) Fr
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c) S
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d) Be
Explanation
Fr is more metallic in given option Answer: (b)
Q.19
Which one of the following represents the electronic configuration of the most electropositive element? ..[ AIIMS 1982]
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a) [He] 2s1
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b) [Xe]6s1
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c) [He]2s2
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d) [Xe]2s2
Explanation
option (a) and (b) elements are alkali metals, but size of option (b) element is more Answer: (b)
Q.20
The outermost electronic configuration of the most electronegative element is .. [ IIT 1988]
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a) ns2np3
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b) ns2np4
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c) ns2np5
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d) ns2np6
Explanation
By accepting one electron p-orbital gets completely filled Answer: (c)
Q.21
The electron configuration of four elements are given below. Which elements does not belong to the same family as others? [ CBSE PMT 1989]
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a) [ Xe] 4f145d106s2
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b) [ Kr] 4d10 5s2
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c) [ Ne] 3s2 3p5
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d) [ Ar] 3d104s2
Explanation
Except option (c) all others have similar configuration but period are different, have same group, option (c) belong to different group Answer: (c)
Q.22
Pauling's electronegativity values for elements are useful in predicting .. [ CBSE PMT 1989]
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a) Polarity of the molecules
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b) Position in the E.M.F. series
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c) COordination number
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d) Dipole moments
Explanation
Answer: (a)
Q.23
In halogen group which tendency works with increase in atomic number .. [ NCERT 1980]
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a) Ionic size decreases
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b) Tendency to lose electron decreases
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c) Ionization energy decreases
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d) IN MX2 (M=Metal, X=halogen) Covalent character decreases
Explanation
Answer: (c)
Q.24
The maximum valency of halogen group with respect to oxygen is ..[ DPMT 1986]
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a) 1
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b) 5
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c) 6
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d) 7
Explanation
compound halogen group forms with oxygen with maximum valency is Cl2O7 , I2O7 Here is valency is 7. Answer: (d)
Q.25
Amongst the following electronic configurations which one will have the highest electron affinity? [ Pb. CET 1988]
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a) 1s1
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b) 1s22s1
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c) 1s22s22p4
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d) 1s22s22p5
Explanation
option (d) has five electrons on p orbital, by accepting one electron it attends octate Answer: (d)
Q.26
(n-1)d10ns2 is the general electronic configuration of .. [ Pb CET 1998]
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a) Fe, Co, Ni
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b) Cu,Ag, Au
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c) Zn, Cd, Hg
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d) Sc, Y, La
Explanation
Given configuration is for transition elements with filled d-orbital Zn belong to 3 period, Cd belong to 4 period and H belong to 5th period of d-block elementsAnswer: (c)
Q.27
Mercury is the only metal which is liquid at 0°C. This is due to its.. [ CBSE PMT 1995]
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a) Very high ionization energy and weak metallic bond
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b) Low ionization potential
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c) High atomic radius
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d) High vapour pressure
Explanation
Answer: (a)
Q.28
The ionization potential of nitrogen is more than that of oxygen because of ... [ AIIMS 1982 ]
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a) The greater attraction of the electrons by nucleus
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b) The extra stability of the half filed p-orbitals
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c) The smaller size of nitrogen
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d) More penetration effect
Explanation
configuration is 1s2, 2s2, 2p3 Nitrogen p-orbital is half filled thus extra stability, so ionization potential is more for Nitrogen than Oxygen Answer: (b)
Q.29
The first ionization potential of Na, Mg, Al and Si are in the order .. [ IIT 1988]
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a) Na < Mg > Al < Si
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b) Na > Mg > Al > Si
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c) Na < Mg < Al > Si
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d) Na > Mg > Al < Si
Explanation
IE1 of Mg is greater than Na because of increased nuclear change IE1 of Mg is greater than Al as electron will be removed from 3p orbitalIE1 is higher than Mg and Al because of increased nuclear chargeCorrect option (d)Answer: (d)
Q.30
The first ionization potential of Na, Mg, Al and Si are in the order .. [ IIT 1988]
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a) Na < Mg > Al < Si
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b) Na > Mg > Al > Si
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c) Na < Mg < Al > Si
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d) Na > Mg > Al < Si
Explanation
IE1 of Mg is greater than Na because of increased nuclear change IE1 of Mg is greater than Al as electron will be removed from 3p orbitalIE1 is higher than Mg and Al because of increased nuclear chargeCorrect option (d)Answer: (a)
0 h : 0 m : 1 s
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