Class 11 MCQ Questions Chemistry Chapter 3 Classification Of Elements And Periodicity In Properties With Answer

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Class 11 MCQ Questions Chemistry Chapter 3 Classification of Elements and Periodicity in Properties with answer | NEET MCQ Chemistry

Q.1 Which of the following has the highest boiling point?

(a) Ne
(b) Xe
(c) Ar
(d) Kr

(b) Xe

Q.2 The group number, number of valence electrons, and valency of an element with the atomic number 15, respectively, are:

(a) 16, 5 and 2
(b) 15, 5 and 3
(c) 16, 6 and 3
(d) 15, 6 and 2

(b) 15, 5 and 3

Q.3 The d-block elements consists mostly of

(a) Monovalent metals
(b) All non-metals
(c) Elements which generally form stoichiometric metal oxide
(d) Many metals with catalytic properties

(d) Many metals with catalytic properties

Q.4 The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Its reason is:

(a) Both are found together in nature
(b) Both have nearly the same size
(c) Both have similar electronic configuration
(d) The ratio of their charge and size (i.e. charge density) is nearly the same

(d) The ratio of their charge and size (i.e. charge density) is nearly the same

Q.5 The element with atomic number 35 belongs to

(a) d – Block
(b) f – Block
(c) p – Block
(d) s – Block

Q.6 The correct order of first ionization potential among following elements, Be, B, C, N and O is

(a) B < Be < C < O < N
(b) B < Be < C < N < O
(c) Be < B < C < N < O
(d) Be < B < C < O < N

(a) B < Be < C < O < N

Q.7 In the periodic table, the element with atomic number 16 will be placed in the group

(a) Third
(b) Fourth
(c) Fifth
(d) Sixth

(d) Sixth

Q.8 Representative elements are those which belong to

(a) p and d – Block
(b) s and d – Block
(c) s and p – Block
(d) s and f – Block

Q.9 Which of the following properties generally decreases along a period?

(a) Ionization Energy
(b) Metallic Character
(c) Electron Affinity
(d) Valency

(b) Metallic Character

Q.10 Which pair of elements belongs to same group?

(a) Elements with atomic no. 17 and 38
(b) Elements with atomic no. 20 and 40
(c) Elements with atomic no. 17 and 53
(d) Elements with atomic no. 11 and 33

Q.11 The most electronegative element of the periodic table is

(a) Iodine
(b) Sulphur
(c) Oxygen
(d) Fluorine

(d) Fluorine

Q.12 On the Paulings electronegativity scale the element next to F is

(a) N
(b) Cl
(c) O
(d) Ne

Q.13 In the third period of the Periodic Table the element having smallest size is

(a) Na
(b) Ar
(c) Cl
(d) Si

(b) Ar

Q.14 The element with highest second ionization energy is

(a) Cl
(b) S
(c) Na
(d) Mg

Q.15 The reduction in atomic size with increase in atomic number is a characteristic of elements of-

(a) d−block
(b) f−block
(c) Radioactive series
(d) High atomic masses

(b) f−block

Q.16 Which of the following properties generally decreases along a period?

(a) Ionization Energy
(b) Metallic Character
(c) Electron Affinity
(d) Valency

(b) Metallic Character

Q.17 The group number, number of valence electrons, and valency of an element with the atomic number 15, respectively, are:

(a) 16, 5 and 2
(b) 15, 5 and 3
(c) 16, 6 and 3
(d) 15, 6 and 2

(b) 15, 5 and 3

Q.18 Increasing order of electronegativity is

(a) Bi < P < S < Cl
(b) P < Bi < S < Cl
(c) S < Bi < P < Cl
(d) Cl < S < Bi < P

(a) Bi < P < S < Cl

Q.19 Which of the following statement is correct with respect to the property of elements with an increase in atomic number in the carbon family (group 14)

(a) Atomic size decrease
(b) Ionization energy increase
(c) Metallic character decrease
(d) Stability of +2 oxidation state increase

(d) Stability of +2 oxidation state increase

Q.20 In the modern periodic table , the period indicates the value of:

(a) Atomic Number
(b) Atomic Mass
(c) Principal Quantum Number
(d) Azimuthal Quantum Number

Q.21 According to the periodic law of elements the variation in properties of elements is related to their

(a) nuclear neutron-proton number ratio
(b) atomic masses
(c) nuclear masses
(d) atomic numbers

(d) atomic numbers

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