Periodic Classification of Elements NEET Questions

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    Periodic Classification of Elements NEET Questions for Students

    Quick Quiz

    The long form of the Periodic Table is based on

    (a) electronegativity

    (b) mass of the atom

    (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

    (d) light 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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