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Periodic Classification of Elements NEET Questions for Students
The long form of the Periodic Table is based on
(a) electronegativity
(c) the shape of the atom
(d) atomic number
Option d – atomic number
Out of the four blocks in which the periodic table is divided, helium belongs to which block? ( Periodic Classification of Elements NEET QnA )
(a) s-block
(b) p-block
(c) d-block
(d) f-block
Option b – p-block
The horizontal rows and the vertical columns in the periodic table are termed respectively.
(a) Periods, groups
(b) Groups, periods
(c) Series, periods
(d) Family, periods
Option a – Periods, groups
Elements having similar outer shell electronic configurations in their atoms are arranged in ( Periodic Classification of Elements NEET QnA )
(a) groups
(b) vertical columns
(c) families
(d) All of these
Option d – All of these
According to IUPAC, the total number of groups and periods in the periodic table respectively are
(a) 16,9
(b) 18, 7
(c) 18,9
(d) 13,7
Option b – 18, 7
Multiplication of equivalent weight and valency of an element is equal to ……. ( Periodic Classification of Elements NEET QnA )
(a) density
(b) relative temperature
(c) atomic weight
(d) atomicity
Option c – atomic weight
Which one of the following properties changes with valency?
(a) Atomic weight
(b) Equivalent weight
(c) Molecular weight
(d) Density
Option b – Equivalent weight
Which of the following types of elements show variable valency? ( Periodic Classification of Elements NEET QnA )
(a) Transition elements
(b) s-block elements
(c) f-block elements
(d) Both (a) and (c)
Option d – Both (a) and (c)
The ionization potential of nitrogen is
(a) the same as that of oxygen.
(b) less than that of oxygen.
(c) greater than that of oxygen.
(d) None of the above
Option c – greater than that of oxygen
Which one of the following represents the correct order of electron releasing tendency of metals? ( Periodic Classification of Elements NEET QnA )
(a) Zn > Cu > Ag
(b) Ag> Cu > Zn
(c) Cu > Zn> Ag
(d) Cu > Ag > Zn
Option a – Zn > Cu > Ag
Which one of the following is not a periodic property i.e., does not show any trend on moving from one side to the other in the Periodic Table?
(a) Atomic size
(b) Valency
(c) Radioactivity
(d) Electronegativity
Option c – Radioactivity
In Mendeleev’s periodic table, iodine with a lower atomic weight than that of tellurium was placed along with ( Periodic Classification of Elements NEET QnA )
(a) iron, cobalt, and nickel
(b) fluorine, chlorine, and bromine
(c) oxygen, sulfur, and selenium
(d) carbon, silicon, and germanium
Option b – fluorine, chlorine, and bromine
Consider the following statements, I. In Mendeleef’s periodic table, the position of the isotopes was not fixed. II. In the 19th century, Mendeleef propounded periodic law based on atomic mass. Which of the above statement(s) is/are correct?
(a) Only I
(b) Only II
(c) Both I and II
(d) Neither of them
Option c – Both I and II
How many elements are there in the 5th Period of the Modern Periodic Table? ( Periodic Classification of Elements NEET QnA )
(a) 2
(b) 8
(c) 18
(d) 36
Option c – 18
Which group of Periodic Tables contains no metal?
(a) IA
(b) III A
(c) VII A
(d) VII B
Option c – VII A
The elements of the group in the Periodic table ( Periodic Classification of Elements NEET QnA )
(a) have similar chemical properties.
(b) have consecutive atomic numbers.
(c) are isobars.
(d) are isotopes.
Option a – have similar chemical properties
All the elements in a group in the Periodic Table have the same
(a) atomic weight
(b) number of valences electrons
(c) atomic number
(d) None of the above
Option b – number of valences electrons
Which of the following is not a noble gas? ( Periodic Classification of Elements NEET QnA )
(a) Neon
(b) Hydrogen
(c) Helium
(d) Argon
Option b – Hydrogen
Periodic classification of elements can be done on the basis of electronic configuration and is used to examine the
(a) periodic trends in the physical properties of elements.
(b) periodic trends in chemical properties of elements.
(c) Both (a) and (b)
(d) None of the above
Option c – Both (a) and (b)
Johann Dobereiner gave the idea of trends among physical and chemical properties of several groups of three elements, the relationship referred to as ( Periodic Classification of Elements NEET QnA )
(a) the law of Triads.
(b) law of Dobereiner.
(c) law of Octaves.
(d) law of Duet.
Option a – the law of Triads
Chemical properties of elements, according to Lothar Meyer, are the periodic function of their ( Periodic Classification of Elements NEET QnA )
(a) valency
(b) atomic number
(c) atomic weight
(d) atomic size
Option c – atomic weight
In a periodic table, while moving from left to right in a period, the number remains the same.
(a) electrons
(b) protons
(c) shells
(d) neutrons
Option c – shells
The metal which is hard and has high m.p. and is used in electric bulbs is ( Periodic Classification of Elements NEET QnA )
(a) Ni
(b) Pt
(c) Fe
(d) W
Option d – W
The lightest liquid metal is
(a) Hg
(b) Ga
(c) Cs
(d) Fr
Option c – Cs
Elements of which group form anions most readily?
(a) Oxygen family
(b) Nitrogen family
(c) Halogens
(d) Alkali metals
Option c – Halogens
Which of the following is not a representative element?
(a) Fe
(b) K
(c) Ba
(d) N
Option a – Fe
Which one of the following is the most electropositive element?
(a) Sodium
(b) Calcium
(c) Aluminium
(d) Silicon
Option a – Sodium
As you move down the group, the alkali metals become
(a) brighter
(b) hotter
(c) more reactive
(d) less reactive
Option c – more reactive
Which is a metalloid?
(a) Pb
(b) Sb
(c) Bi
(d) Zn
Option b – Sb
Which of the following set of elements is written in order of their increasing metallic character?
(a) Be, Mg, Ca
(b) Na, Li, K
(c) Mg, Al, Si
(d) C, O, N
Option a – Be, Mg, Ca
Which of the given elements A, B, C, D and E with atomic numbers 2, 3, 7, 10 and 30 respectively belong to the same period?
(a) A, B, C
(b) B, C, D
(c) A, D, E
(d) B, D, E
Option b – B, C, D
An element which is an essential constituent of all organic compounds belongs to
(a) group 1
(b) group 14
(c) group 15
(d) group 16
Option b – group 14
Arrange the following elements in the order of their increasing non-metallic character Li, O, C, Be, F
(a) F<0<C<Be <Li
(b) Li<Be<C<O<F
(c) F<O<C<Be <Li
(d) F<O<Be<C<Li
Option b – Li
Which of the following properties do not match elements of the halogen family?
(a) They have seven electrons in their valence shell
(b) They are diatomic in their molecular form
(c) They are highly reactive chemically
(d) They are metallic in nature
Option d – They are metallic in nature
On the basis of the following features identify correct option A. These elements majorly form acidic oxides B. These elements are majorly non-metals.
(a) s-block elements
(b) p-block elements
(c) d-block elements
(d) f-block elements
Option b – p-block elements
On the basis of the following features identify correct option A. Gaps were left for undiscovered elements B. No correct position of hydrogen C. The isotopes of the same element will be given different positions
(a) Mendeleev’s periodic table
(b) Modern periodic table
(c) Newland’s arrangement of elements
(d) Both (a) and (b)
Option a – Mendeleev’s periodic table
Bromine is a
(a) Colourless gas
(b) Brown solid
(c) Highly inflammable gas
(d) Red liquid
Option d – Red liquid
Bright light is found to emit from the photographer’s flashgun. This brightness is due to the presence of which one of the following noble gases?
(a) Argon
(b) Xenon
(c) Neon
(d) Helium
Option b – Xenon
Newlands could classify elements only upto
(a) copper
(b) chlorine
(c) calcium
(d) chromium
Option c – calcium
The element with the smallest size in group 13 is
(a) beryllium
(b) carbon
(c) aluminium
(d) boron
Option d – boron
The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all
(a) halogen
(b) noble gases
(c) noble metals
Option b – noble gases
The number table is of elements in the third period of periodic
(a) 2
(b) 8
(c) 18
(d) 32
Option b – 8
The element which has the least tendency to lose electrons is
(a) H
(b) Li
(c) He
(d) Ne
Option c – He
The three elements calcium, strontium and barium form a triad. What is the basis of this grouping? A. Elements are in the increasing order of their atomic weights. B. The atomic weight of the middle element is equal to the average atomic weight of extreme elements. C. Elements in a triad have similar chemical properties.
(a) Only A and B
(b) Only B and C
(c) Only A and C
(d) A, B and C
Option d – A, B and C
Which element is named in honour of Fermi?
(a) 10th
(b) 50th
(c) 100th
(d) 75th
Option c – 100th
The high melting point of transition elements is due to
(A) Ionic bonding
(B) Covalent bonding
(C) Metallic bonding
(D) Both (B) and (C)
Option d – Both (B) and (C)
Which one of the following contains the maximum number of unpaired electrons?
(A) CrCl3
(B) MnCl₂
(C) FeSO4
(D) CdSO4
Option b – MnCl₂
The color of transition metal compounds is attributed to
(A) Incomplete and subshell
(B) Absorption of light in the UV region
(C) Incomplete anti penultimate d-subshell
(D) Incomplete (n-1) d subshell due to which d-d transitions take place
Option d – Incomplete (n-1) d subshell due to which d-d transitions take place
Which class of elements usually gives colored ions?
(A) Transition elements
(B) Inner transition elements
(C) Both the above
(D) None of the above
Option c – Both the above
According to the effective atomic number rule, the central atom tries to acquire
(A) Inert gas configuration
(B) Doublet
(C) Complete octet
(D) Fully quartet
Option a – Inert gas configuration
Titanium shows a magnetic moment of 1.73 B.M. in its compounds. What is the oxidation number of Ti in the compound?
(A) + 1
(B) + 4
(C) + 3
(D) + 2
Option c – + 3
Which of the following compounds is most likely to contain non-metal atoms in the interstices of a metal lattice?
(A) Fe3O4
(B) TiN
(C) MnO2
(D) CoF2
Option b – TiN
In a transition series, with the increase in atomic number, the paramagnetism
(A) Increases gradually
(B) Decreases gradually
(C) First increases to a maximum and then decreases
(D) First decreases to a minimum and then increases
Option c – First increases to a maximum and then decreases
The maximum oxidation state of Chromium is
(A) +6
(B) +7
(C) +4
(D) +8
Option a – +6
The maximum oxidation state of Osmium is
(A) +7
(B) +8
(C) +6
(D) +10
Option b – +8
The maximum oxidations state of Manganese is
(A) +5
(B) +7
(C) +6
(D) +3
Option b – +7
The highest oxidation state achieved by a transition metal is given by
(A) ns electrons
(B) (n-1) d electrons
(C) (n + 1) d electrons
(D) ns + (n – 1) d electrons
Option d – ns + (n – 1) d electrons
Which of the following pairs has both members from the same group of the modern periodic table?
(A) Ra, Ba
(B) Co, Pt
(C) Fr, Sr
(D) Pb, Sb
Option a – Ra, Ba
Considering the elements B, Al, Mg, and Ca, the CORRECT order of their metallic character is ……….
(A) B>Al> Mg > Ca
(B) Al> Mg > B> Ca
(C) Mg>Al>Ca> B
(D) Ca> Mg > Al > B
Option d – Ca> Mg > Al > B
Which of the following is NOT an actinoid?
(A) Curium (Z = 96)
(B) Californium (Z = 98)
(C) Uranium (Z = 92)
(D) Terbium (Z = 65)
Option d – Terbium (Z = 65)
Which of the following elements has the maximum negative value of electron gain enthalpy?
(A) I
(B) Br
(C) Cl
(D) F
Option c – Cl
Which of the following is the CORRECT statement?
(A) All the elements of group 1 are nonmetals.
(B) All the elements of group 11 are metals.
(C) All the elements of group 15 are nonmetals.
(D) All the elements of group 14 are metals.
Option b – All the elements of group 11 are metals.
The maximum covalency of boron is ……….
(A) 2
(B) 3
(C) 4
(D) 6
Option c – 4
Among the following elements, the second ionization energy is maximum for ……….
(A) boron
(B) beryllium
(C) magnesium
(D) aluminum
Option a – boron
The elements in the same vertical column of the modern periodic table have ………..
(A) different chemical properties
(B) the same number of valence electrons
(C) different valence shell electronic configurations
(D) the same number of shells or orbits
Option b – the same number of valence electrons
An element belongs to group 13 and period 3. Which of the following is the CORRECT for this element?
(A) It is liquid at room temperature.
(B) It is a metallic element.
(C) It is a bad conductor of electricity.
(D) It is a metalloid.
Option b – It is a metallic element.
The decreasing order of the first ionization enthalpy of the following elements is ……….
(A) Cl>P> S > Si
(B) Cl>P> Si > S
(C) Cl>S> P > Si
(D) Cl>S> Si > P
Option a – Cl>P> S > Si
Which of the following periodic property increases across the period with an increase in atomic number?
(A) Electronegativity
(B) Atomic radius
(C) Metallic character
(D) Valence
Option a – Electronegativity
Select the statement which is NOT CORRECT.
(A) The most electronegative element in the periodic table is fluorine.
(B) Scandium is the first transition element and belongs to the fourth period.
(C) Along a period halogens have maximum negative electron gain enthalpy.
(D) There are three transition series in the periodic table each containing 10 elements.
Option d – There are three transition series in the periodic table each containing 10 elements.
Which of the following is the atomic number of a metal?
(A) 32
(B) 34
(C) 36
(D) 38
Option d – 38
By using the systematic nomenclature recommended by IUPAC, the name for the element with atomic number 115 is ………..
(A) Ununpentane
(B) Ununpentium
(C) Unbipentium
(D) Unnilpentium
Option b – Ununpentium
In a periodic table, the basic character of oxides ……….
(A) increases from left to right across a period and decreases from top to bottom in the group
(B) increases from left to right across a period and increases from top to bottom in the group
(C) decreases from left to right across a period and increases from top to bottom in the group
(D) decreases from left to right across a period and decreases from top to bottom in the group
Option c – decreases from left to right across a period and increases from top to bottom in the group
An element ‘X’ forms a diatomic molecule (X₂). 28 g of this X₂ gas (considering ideal behavior) occupies a volume of 22.4 L at STP. What is the position of element ‘X’ in the modern periodic table?
(A) Group 16 and Period 2
(B) Group 15 and Period 3
(C) Group 17 and Period 2
(D) Group 15 and Period 2
Option d – Group 15 and Period 2
Which of the following IRS are chemically dissimilar?
(A) Na and K
(B) Ba and Sr
(C) Si and Ge
(D) Ca and Zn
Option d – Ca and Zn
Which of the following is the CORRECT order of increasing electronegativity?
(A) S<Si<P
(B) Si<P<S
(C) S<P<Si
(D) P<Si<S
Option b – Si
Which of the following is the CORRECT periodic trend?
(A) Number of valence electrons: Al < Mg < Na
(B) First ionization enthalpy: O> F > Ne
(C) Atomic radius: B Mg > Be
(D) Metallic character: Na > Mg > Be
Option d – Metallic character: Na > Mg > Be
Which of the following has the highest first ionization enthalpy?
(A) Carbon
(B) Oxygen
(C) Nitrogen
(D) Boron
Option c – Nitrogen
The increasing order of reactivity of the elements Na, K, Rb, and Cs is ………..
(A) Na<K<Cs < Rb
(B) Cs<Rb<K<Na
(C) Na<K<Rb<Cs
(D) K<Na<Cs<Rb
Option c – Na
P. Q and R are elements in the third period. The oxide of ‘P’ is basic, that of ‘Q’ is amphoteric and of ‘R’ is acidic. P, Q, and R have an atomic number in the order ………
(A) P<Q<R
(B) R<Q<P
(C) P<R<Q
(D) Q<P<R
Option a – P
The ionization enthalpy of Al is less than that of Mg. This is due to ……….
(A) increase in the number of valence electrons
(B) the presence of valence electrons in the 3p subshell in Al
(C) the smaller atomic size of Mg
(D) increases in atomic number from Mg to Al
Option b – the presence of valence electrons in the 3p subshell in Al
The first ionization enthalpy of Na is 5.1 eV. The value of electron gain enthalpy of Na will be ……….
(A) +2.55 eV
(B) -2.55 eV
(C) -5.1 eV
(D) -10.2 eV
Option c – -5.1 eV
Among the elements with atomic numbers 9, 12, 16, and 36, which is highly electropositive?
(A) Element with atomic number 9.
(B) Element with atomic number 12.
(C) Element with atomic number 16.
(D) Element with atomic number 36.
Option b – Element with atomic number 12.
The oxide of which of the following elements will be acidic in nature?
(A) Mg
(B) Rb
(C) Li
(D) Cl
Option d – Cl
Which of the following statement is CORRECT about the modern periodic table?
(A) The total number of elements in period 4 is 8.
(B) The 5d transition series starts from yttrium.
(C) The elements in groups 3 to 12 are characterized by the filling of inner d-orbitals by electrons.
(D) The elements in the f-block are all nonmetals.
Option c – The elements in groups 3 to 12 are characterized by the filling of inner d-orbitals by electrons.
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