Classification of Elements and Periodicity in Properties Class 11 Chemistry MCQs

Classification of Elements and Periodicity in Properties Class 11 Chemistry MCQs

These MCQs of Classification of Elements and Periodicity in Properties chapter are prepared by our Chemistry Expert. By practising following MCQs, students will be able to quickly revise all the concepts of the Classification of Elements and Periodicity in Properties Chapter. Additionally, Classification of Elements and Periodicity in Properties Class 11 Chemistry MCQs will be helpfull for JEE And NEET Aspirants.

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Classification of Elements and Periodicity in Properties Class 11 Chemistry MCQs (Set A)

1. The screening effect of 𝑑-electrons is:

(A) Equal to the 𝑝-electrons

Answer: Less than 𝑝-electrons

2. Which has the largest first ionisation energy?

(A) Li

Answer: Li

3. The electronic configuration of four elements are given below. Which element does not belong to the same family?

(A) [Xe]4𝑓145𝑑10^6𝑠2

(B) [Kr] 4𝑑10^5𝑠2

(C) [Ne]3𝑠2 3𝑝5

(D) [Ar] 3𝑑 10^4𝑠2

Answer:[Ne]3𝑠2 3𝑝5

4. Which statement is wrong?

(A) None

Answer: None

5. According to IUPAC nomenclature, a newly discovered element has been named as Uun. The atomic number of the element is

(B) 110

(C) 108

(D) 107

6. Which of the following transitions involves maximum amount of energy?

(A) 𝑀−(g) → 𝑀(g)

(B) 𝑀(g) → 𝑀+(g)

(C) 𝑀+(g) → 𝑀2+(g)

(D) 𝑀2+(g) → 𝑀3+(g)

Answer :𝑀2+(g) → 𝑀3+(g)

7. Find the largest ionic radius?

(A) Li+

(B) K+

(C) Na+

(D) Cs+

Answer: Ca+

Classification of Elements and Periodicity in Properties Class 11 Chemistry MCQs (Set B)

1. Amphoteric oxide combinations are in

Answer:SnO2, Al2O3, ZnO

2. Generally, the first ionisation energy increases along a period. But there are some exceptions. One which is not an exception is

A) N and O

Answer:N and O

3. Which of the following configuration is associated with biggest jump between 2nd and 3rd 𝐼𝐸?

(A) 1𝑠2, 2𝑠2,2𝑝2

(B) 1𝑠2, 2𝑠2,2𝑝6, 3𝑠1

(C) 1𝑠2, 2𝑠2,2𝑝6, 3𝑠2

(D) 1𝑠2, 2𝑠2,2𝑝1

Answer:1𝑠2, 2𝑠2,2𝑝6, 3𝑠2

4. In a given shell the order of screening effect is

Answer : None

5. The formation of the oxide ion O2−(g) requires first an exothermic and then an endothermic step as shown below;O(g) + 𝑒− = O−(g); ∆𝐻° =−142 kJmo1−1O(g)− + 𝑒− = O2−(g); ∆𝐻° =844 kJmo1−1This is because

Answer: None

6. In which of the following arrangements the order is not correct according to property indicated against it?

(A) Increasing size : Al3+ < Mg2+ < Na+ < F−(B) Increasing 𝐼𝐸1 ∶ B < C < N < O

Answer: Increasing 𝐼𝐸1 ∶ B < C < N < O

7. Increase in atomic size down the group is due to

(A)Increase in number of electrons

Answer:Increase in number of electrons

8. When the first ionisation energies are plotted against atomic number, the peaks are occupied by

Answer: Rare gases

Classification of Elements and Periodicity in Properties Class 11 Chemistry MCQs (Set C)

1. Ionization potential of Na would be numerically the same as:

(A) Electron affinity of Na+

(B) Electronegativity of Na+

(C) Electron affinity of He

Answer :Electron affinity of Na+

2. Ionisation potential is lowest for

Answer: Alkali metals

3. Ionisation potential for a noble gas is

Answer :Maximum in a period

4. Which group’s elements form anions most readily?

(A) Halogens

Answer: Halogens

5. In the Periodic Table metallic character of elements shows one of the following trend

Answer: Decreases across period and Increases down the group

6. Size of iodine species , correct order:-

(A) I > I− > I+

(B) I− > I > I+

(C) I+ > I > I−

(D) I− > I+ > I

Answer:I− > I > I+

7. The correct order in which the first ionisation potential increases is

Answer:K, Na, Be

8. In which block does 106th element belong?(A) 𝑠-block

Answer:𝑑-block

Classification of Elements and Periodicity in Properties Class 11 Chemistry MCQs (Set D)

1. In third row of Periodic Table, the atomic radii from Na to Cl

Answer:Continuously decreases

2. The elements with atomic numbers 9, 17, 35, 53, 85 are all

Answer: Noble gases

3. Fluorine has low electron affinity than chlorine because of

Answer:Smaller radius of fluorine, high density

4. The first ionisation potential is maximum for

Answer: N

5. Electron affinity of Na+Electron affinity of Na+.The ionic radius of the isoelectronic ion N3−would be if the ionic radii (Å) of C4−and O2− respectively are 2.60 and 1.40.

(A) 2.6

(B) 1.71

(C) 1.4

(D)none

Answer: 1.71

6. Which element has maximum electron affinity?

(A) Na

Answer : Cl

7. According to Moseley, a straight lined on plotting :

(A) the frequencies of characteristic line graph

(B) the square of the frequency

Answer:none

8. The atomic volume was chosen as the basis of periodic classification of elements by : (A) Niel Bohr (B) Mendeleev (C) Lother Meyer (D) Newland

Classification of Elements and Periodicity in Properties Class 11 Chemistry MCQs (Set E)

1. Eka-aluminium and Eka-silicon are known as :

(A) Gallium and germanium

Answer: Gallium and Germanium

2. The elements with atomic number 117 and 120 are yet to be discovered. Find the group would you place these elements when discovered?

(A) 17, 2

(B) 16, 4

(C) 15, 3

(D) 18, 2

Answer:17 , 2

3. An element whose IUPAC name is ununtrium (Uut) belongs to :

(A) s-block element

(B) p-block element

(C) d-block element

(D) Transition element

Answer:p-block elements

4. Suppose an orbital may accommodate three electrons, then estimate the number of elements in 2nd period:

(A) 3

(B) 6

(C) 8

(D) 12

Answer : 12

5. Unniltrium belongs to which block and group of the periodic table?

(A) d-block, group-10

Answer: f-block, group-3

6. 1s^2 , 2s^2 2p^6, 3s^2 3p^6 3d^10, 4s^2 4p^6 4d^10, 5s^2 is electronic configuration for:

(A) f-block element

(B) d-block element

(C) p-block element

Answer: d-block element

7. Ionic radii are

(A) directly proportional to square of effective nuclear charge

(B) Inversely proportional to effective nuclear charge

(C) It isInversely proportional to square of effective nuclear charge

Answer :It is Inversely proportional to square of effective nuclear charge

8. The decreasing order of second ionization potential of K, Ca, Ba is

Answer:K > Ca > Ba

Classification of Elements and Periodicity in Properties Class 11 Chemistry MCQs (Set F)

1. Which of the following has highest first ionization potential?

(A) carbon

Answer: nitrogen

2. In the second period of periodic table, the ionization potential of elements increases from left to right because of

(A) Increase in densities

Answer : increase in densities

3. The correct order of ionization energy for the following species is

Answer: H– >He > Li+

4. Which of the following configurations represents atom of elements having the highest second ionisation energy?

(A) 1s2,2s2,2p4

(B) 1s2,2s2,2p6,3s1

(C) 1s2,2s2,2p6,3s1

(D) 1s2,2s2,2p6,3s2

Answer: 1s2,2s2,2p6,3s1

5. Consider the following changes: A → A+ + e–; E1 and A+ → A2++ e–; E2Find the energy required to pull out 1st and 2ndelectrons are E1 and E2 respectively. The correct relationship between two energies would be:

(A) E1 < E2

Answer: E1 < E2

6. Find incorrect relation to ionization enthalpy?

(A) Ionization enthalpy increases for each successive electron

Answer :Removal of electron from orbitals belonging lower n value is easier than from orbital having higher n values

7. Electron affinity is positive, when______.

(B) O- changes into O2–

(C) O changes into O

Answer: O- changes into O2–

8. The electronic configuration of the element with maximum electron affinity is

(A) 1s2, 2s2, 2p3

(B) 1s2, 2s2, 2p5

(C) 1s2, 2s2, 2p6, 3s2, 3p5

(D) 1s2, 2s2, 2p6, 3s2, 3p3

Answer: 1s2, 2s2, 2p6, 3s2, 3p5

Classification of Elements and Periodicity in Properties Class 11 Chemistry MCQs (Set G)

1. Fluorine has low electron affinity than chlorine because of

(A) Bigger radius of fluorine, less density

Answer: Smaller radius of fluorine, high density

2. Which of the following have highest electron affinity?

(A) N

(B) O

(C) F

(D) Cl

Answer : Cl

3. The second electron affinity is zero for

(A) Alkali metals

Answer : Noble gases

4. For the formation of covalent bond, the difference in the value of electronegative should be:

(a) Equal to or less than 1.7

(b) More than 1.7

(c) 1.7 or more

Answer :Equal to or less than 1.7

5. Diagonal relationship is for

Answer : B- Si

6. Amphoteric oxide combinations are in

Answer:SnO2, Al2O3, ZnO

7. Elements whose electronegativities are 1.2 and 3.0, form:

(a) Ionic bond

Answer : ionic bond

8. The electronic configuration of most electronegative elements is

Answer:1s2, 2s2, 2p5

9. Among the following elements, the most electronegative is:

(a) Oxygen

Answer: Fluorine

10. Which is not a scale of measuring electronegativity?

(a) Stevenson’s scale

Answer:Stevenson’s scale

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