Classification of Elements and Periodicity in Properties NEET Questions 2024

Classification of Elements and Periodicity in Properties NEET Practice Questions

1 / 25

Which of the following oxides is amphoteric?

SnO₂

CaO

SiO₂

CO₂

2 / 25

If the atomic number of an element is 33, it will be placed in the periodic table in the

(a) first group

(b) third group

(d) seventh group

3 / 25

Which of the following is the most basic oxide?

SeO₂

Al₂O₃

Sb₂O₃

Bi₂O₃

4 / 25

What is the correct relationship between the pH of picomolar solutions of sodium oxide, Na₂O (pH₁), sodium sulfide, Na₂S (pH₂), sodium selenide, Na₂Se (pH₃), and sodium telluride Na₂Te (pH₄)?

pH₁ > pH₂ > pH₃ > pH₄

pH₁ > pH₂ ≈ pH₃ > pH₄

pH1 < pH₂ < pH₃ < pH₄

pH₁ < pH₂ < pH₃ ≈ pH₄

5 / 25

Which of the following oxides is most acidic in nature?

MgO

BeO

BaO

CaO

6 / 25

In which of the following options the order of arrangement does not agree with the variation of the property indicated against it?

I < Br < Cl < F (increasing electron gain enthalpy)

Li < Na < K < Rb (increasing metallic radius)

Al³⁺ < Mg²⁺ < Na⁺ < F^– (increasing ionic size)

B < C < N < O (increasing first ionization enthalpy)

7 / 25

Ionic radii are

inversely proportional to the effective nuclear charge

inversely proportional to the square of effective nuclear charge

directly proportional to the effective nuclear charge

directly proportional to the square of effective nuclear charge.

8 / 25

Which of the following orders of ionic radii is correctly represented?

H^– > H⁺ > H

Na⁺ > F^– > O2^–

F^– > O₂^– > Na⁺

None

9 / 25

Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F, and O ?

Al < Ca < O < C < F

Al < O < C < Ca < F

C < F < O < Al < Ca

Ca < Al < C < O < F

10 / 25

Identify the correct order of the size of the following.

Ca²⁺ < K⁺ < Ar < Cl^– < S^2–

Ar < Ca²⁺ < K⁺ < Cl^– < S^2–

Ca²⁺ < Ar < K⁺ < Cl^– < S^2–

Ca²⁺ < K⁺ < Ar < S^2– < Cl^–

11 / 25

Among the elements Ca, Mg, P, and Cl, the order of increasing atomic radii is

Mg < Ca < Cl < P

Cl < P < Mg < Ca

P < Cl < Ca < Mg

Ca < Mg < P < Cl

12 / 25

Which one of the following ionic species has the greatest proton affinity to form a stable compound?

NH₂

F^–

I^–

HS^–

13 / 25

What is the value of electron gain enthalpy of Na+ if IE₁ of Na = 5.1 eV?

–5.1 eV

–10.2 eV

+2.55 eV

+10.2 eV

14 / 25

Among the following which one has the highest cation-to-anion size ratio?

CsI

CsF

LiF

NaF

15 / 25

For the second-period elements the correct increasing order of first ionization enthalpy is

Li < Be < B < C < O < N < F < Ne

Li < Be < B < C < N < O < F < Ne

Li < B < Be < C < O < N < F < Ne

Li < B < Be < C < N < O < F < Ne

16 / 25

With which of the following electronic configuration an atom has the lowest ionization enthalpy?

1s² 2s² 2p³

1s² 2s² 2p⁵ 3s¹

1s² 2s² 2p⁶

1s² 2s² 2p⁵

17 / 25

The electronic configuration of an element is 1s² 2s² 2p⁶ 3s² 3p³. What is the atomic number of the element, which is just below the above element in the periodic table?

(a) 36

(b) 49

18 / 25

Identify the wrong statement in the following.

Amongst isoelectronic species, the smaller the positive charge on the cation, the smaller the ionic radius.

Amongst isoelectronic species, the greater the negative charge on the anion, the larger the ionic radius.

The atomic radius of the elements increases as one moves down the first group of the periodic table.

The atomic radius of the elements decreases as one move across from left to right in the 2nd period of the periodic table.

19 / 25

In which of the following arrangements the given sequence is not strictly according to the property indicated against it?

HF < HCl < HBr < HI : increasing acidic strength

H₂O < H₂S < H₂Se < H₂Te : increasing pKa values

NH₃ < PH₃ < AsH₃ < SbH₃ : increasing acidic character

CO₂ < SiO₂ < SnO₂ < PbO₂ : increasing oxidizing power

20 / 25

The correct order of the decreasing ionic radii among the following isoelectronic species is

Ca²⁺ > K⁺ > S^2– > Cl^–

Cl^– > S^2– > Ca²⁺ > K⁺

S^2– > Cl^– > K⁺ > Ca²⁺

K⁺ > Ca²⁺ > Cl^– > S^2–

21 / 25

Which of the following represents the correct order of increasing electron gain enthalpy with a negative sign for the elements O, S, F, and Cl?

Cl < F < O < S

O < S < F < Cl

F < S < O < Cl

S < O < Cl < F

22 / 25

The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?

(a) Carbon family, [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p²

(b) Oxygen family, [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴

(d) Halogen family, [Rn] 5f ¹⁴ 6d¹⁰ 7s² 7p⁵

23 / 25

Amongst the elements with the following electronic configurations, which one of them may have the highest ionization energy?

Ne [3s² 3p²]

Ar [3d¹⁰ 4s² 4p³]

Ne [3s² 3p¹]

Ne [3s² 3p³]

24 / 25

An atom has electronic configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³ 4s², you will place it in

(a) fifth group

(b) fifteenth group

(d) third group.

25 / 25

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

(a) [Xe]4f¹⁴5d¹⁰4s²

(b) [Kr]4d¹⁰5s²

(d) [Ar]3d¹⁰4s²

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Classification of Elements and Periodicity in Properties

Class XI Chemistry Questions

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Some Basic Concepts of Chemistry

Structure of Atom

Classification of Elements

Chemical Bonding

States of Matter

Thermodynamics

Equilibrium

Redox Reactions

Hydrogen

Hydrocarbons

S- Block Elements

Environmental Chemistry

The p – Block Elements

Some Basic Principles and Techniques

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The Solid State

Solutions

Chemical Kinetics

Surface Chemistry

General Principles and Processes of Isolation of Elements

The p – Block Elements

Haloalkanes and Haloarenes

Alcohols, Phenols and Ethers

The d – and f – Block Elements

Aldehydes, Ketones

Coordination Compounds

Carboxylic Acids

Amines

Polymers

Biomolecules

Chemistry in Everyday Life

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