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JEE • CHEMISTRY • CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

Classification of elements and periodicity in properties practice · Easy

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These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

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Showing 1-30 of 184 questions

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1 Easy

1 of 184

Understanding +4 | -1

The compounds of the s-block elements, with the exception of lithium and ...

X

... are predominantly ionic. Here,

X

refers to

View answer and explanation

Correct option: D

Beryllium

The correct answer is D (Beryllium) because, with the exception of lithium and beryllium, compounds of s-block elements are predominantly ionic.

2 Easy

2 of 184

Understanding +4 | -1

The element with atomic number 117 if discovered would be placed in

View answer and explanation

Correct option: D

Halogen family

Option A (Basic solution) is correct because ionic hydrides react with water to form a metal hydroxide and hydrogen gas, resulting in a basic solution.

3 Easy

3 of 184

Analyzing +4 | -1

First, second and third

IE

values are 100 eV, 150 eV and 1500 eV. Element can be

View answer and explanation

Correct option: A

Be

The correct answer is A (Be) because the large jump in IE between IE2 and IE3 indicates that the element readily loses two electrons to achieve a stable configuration.

4 Easy

4 of 184

Remembering +4 | -1

Variable valency is exhibited by

View answer and explanation

Correct option: C

Transitional elements

Option C (Transitional elements) is correct because transition elements exhibit variable valency due to the involvement of d-electrons in bonding.

5 Easy

5 of 184

Understanding +4 | -1

Element of highest first negative electron gain enthalpy is

View answer and explanation

Correct option: D

Cl

Option D (

Cl

) is correct because Chlorine has the highest first negative electron gain enthalpy due to its smaller size and effective nuclear charge compared to Fluorine.

6 Easy

6 of 184

Understanding +4 | -1

The oxide of an element whose electronic configuration is

1{s^2},\;2{s^2},2{p^6},3{s^1}\;

View answer and explanation

Correct option: C

Basic

Option C (Basic) is correct because the element with the given electronic configuration is sodium, which forms a basic oxide (Na2O).

7 Easy

7 of 184

Application +4 | -1

E. N of the element A is

{E_1}

and I.E is

{E_2}

. Hence, E. A will be

View answer and explanation

Correct option: A

2{E_1} - {E_2}

Option A (

2{E_1} - {E_2}

) is correct because it is derived from the formula relating electronegativity (E.N), ionization energy (I.E), and electron affinity (E.A).

8 Easy

8 of 184

Understanding +4 | -1

Which of the following species has the negative electron gain enthalpy?

View answer and explanation

Correct option: B

\mathrm{O}

The correct answer is B (O) because oxygen has a high electron affinity and releases energy when it gains an electron.

9 Easy

9 of 184

Analyzing +4 | -1

Which of the following pairs of atomic numbers represents elements belonging to the same group?

View answer and explanation

Correct option: C

13 and 31

Option C (13 and 31) is correct because elements with atomic numbers 13 (Al) and 31 (Ga) both belong to group 13 of the periodic table.

10 Easy

10 of 184

Remembering +4 | -1

Which of the following electronic configuration represents noble gas?

View answer and explanation

Correct option: A

n{s^2}n{p^6}

Option A (

n{s^2}n{p^6}

) is correct because noble gases have a completely filled valence shell, represented by this electronic configuration.

11 Easy

11 of 184

Remembering +4 | -1

The ability of an atom in a chemical compound to attract shared electron is termed as

View answer and explanation

Correct option: D

Electronegativity

Option D (Electronegativity) is correct because electronegativity is the measure of an atom's ability to attract shared electrons in a chemical bond.

12 Easy

12 of 184

Remembering +4 | -1

Eka-aluminium was later called :

View answer and explanation

Correct option: C

Gallium

Option C (Gallium) is correct because Eka-aluminium, predicted by Mendeleev, was later identified as Gallium.

13 Easy

13 of 184

Understanding +4 | -1

The element with highest electron affinity will belong to

View answer and explanation

Correct option: B

Period 3, group 17

Option B (Period 3, group 17) is correct because chlorine (Cl), in period 3 and group 17, has the highest electron affinity due to its electronic configuration.

14 Easy

14 of 184

Remembering +4 | -1

By what name the elements after Uranium are called :

View answer and explanation

Correct option: D

Transuranium elements

Option D (Transuranium elements) is correct because elements with atomic numbers greater than that of uranium are called transuranium elements.

15 Easy

15 of 184

Analyzing +4 | -1

The electronic configuration of the atom having maximum difference in first and second ionisation energies is

View answer and explanation

Correct option: A

1{s^2},2{s^2},2{p^6},3{s^1}

Option A (

1{s^2},2{s^2},2{p^6},3{s^1}

) is correct because after removing one electron, it achieves a stable noble gas configuration, resulting in a significantly higher second ionization energy.

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P-BLOCK ELEMENTS 736 MCQs Equilibrium 696 MCQs STRUCTURE OF ATOM 634 MCQs THERMODYNAMICS 536 MCQs CHEMICAL BONDING & MOLECULAR STRUCTURE 514 MCQs SOLUTIONS 480 MCQs

16 Easy

16 of 184

Analyzing +4 | -1

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

View answer and explanation

Correct option: B

Increasing

I{E_1}\mathrm{\;}:\mathrm{B} < C < N < O

The correct answer is B (Increasing

I{E_1}{\;}:{\;}\mathrm{B} < C < N < O

) because the first ionization energy of Nitrogen is greater than Oxygen due to the stable half-filled electronic configuration of Nitrogen.

17 Easy

17 of 184

Analyzing +4 | -1

Which of the following ions is most unlikely to exist?

View answer and explanation

Correct option: A

{Li}^{-}

The correct answer is A (Li-) because lithium is an electropositive metal and does not readily form anions.

18 Easy

18 of 184

Analyzing +4 | -1

Which of the following group does not represent the isoelectronic species?

View answer and explanation

Correct option: D

\mathrm{H}_2 \mathrm{~S}, \mathrm{~K}^{+}, \mathrm{Ar}, \mathrm{Cl}

The correct answer is D (

\mathrm{H}_2 \mathrm{~S}, \mathrm{~K}^{+}, \mathrm{Ar}, \mathrm{Cl}

) because these species do not all have the same number of electrons.

\mathrm{H}_2 \mathrm{~S}, \mathrm{~K}^{+}

, and

\mathrm{Ar}

have 18 electrons, but

\mathrm{Cl}

has 17.

19 Easy

19 of 184

Understanding +4 | -1

Which of the following is general electronic configuration of representative elements

View answer and explanation

Correct option: A

n{s^{1 - 2}}n{p^{1 - 5}}

Option C is correct because representative elements (s and p block elements) have the general electronic configuration of

ns^{1-2}np^{0-5}

20 Easy

20 of 184

Understanding +4 | -1

An element with atomic number 20 will be placed in which period of the Periodic Table?

View answer and explanation

Correct option: D

Option D (4) is correct because an element with atomic number 20 (Calcium) has the electronic configuration

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2

, placing it in the 4th period.

21 Easy

21 of 184

Remembering +4 | -1

What is the name of element with atomic number 105?

View answer and explanation

Correct option: B

Dubnium

Option B (Dubnium) is correct because Dubnium is the name of the element with atomic number 105.

22 Easy

22 of 184

Analyzing +4 | -1

The least stable ion among the following is

View answer and explanation

Correct option: B

B{e^ - }

Option B (

Be^−

) is the least stable ion because beryllium has a fully filled 2s subshell (

1s^22s^2

), making it less likely to accept an additional electron.

23 Easy

23 of 184

Understanding +4 | -1

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

View answer and explanation

Correct option: B

Increases down the group and decreases across the period

Option B (Increases down the group and decreases across the period) is correct because metallic character increases as you go down a group (due to increased atomic size and easier electron loss) and decreases as you go across a period (due to increased nuclear charge and harder electron loss).

24 Easy

24 of 184

Remembering +4 | -1

The element having highest electron affinity is

View answer and explanation

Correct option: D

Chlorine

Option D (Chlorine) is correct because Chlorine has the highest electron affinity among the given options due to its size and electronic configuration.

25 Easy

25 of 184

Remembering +4 | -1

Which of the following belong to the category of transition metal

View answer and explanation

Correct option: C

Option C (Fe) is correct because iron is a transition metal with a partially filled d orbital.

26 Easy

26 of 184

Understanding +4 | -1

Which of the following properties show gradual decrease with increase in atomic number across a period in the Periodic Table?

View answer and explanation

Correct option: D

Size of atom

Option D (Size of atom) is correct because atomic size generally decreases across a period due to increasing nuclear charge.

27 Easy

27 of 184

Understanding +4 | -1

Which of the following has both members from the same period of the periodic table.

View answer and explanation

Correct option: C

Na, Cl

Option C (Na, Cl) is correct because both sodium (Na) and chlorine (Cl) are in the same period (period 3) of the periodic table.

28 Easy

28 of 184

Understanding +4 | -1

Which of the following represents the correct order of increasing electron gain enthalpy with negative sign

View answer and explanation

Correct option: B

\mathrm{O < S < F < Cl}

Option B (O < S < F < Cl) is correct because electron gain enthalpy generally increases across a period and decreases down a group, with chlorine having a higher electron affinity than fluorine due to fluorine's small size.

29 Easy

29 of 184

Analyzing +4 | -1

Which of the following transformation requires least energy

View answer and explanation

Correct option: B

{P^ - }\left( g \right)\xrightarrow{\,}P\left( g \right) + {e^ - }

Option B is correct because removing an electron from P- results in a more stable half-filled p3 configuration, requiring the least energy.

30 Easy

30 of 184

Understanding +4 | -1

Among

Mg,{\mkern 1mu} M{g^{2 + }},{\mkern 1mu} Al\,\,\,{\mkern 1mu} \mathrm{and}{\mkern 1mu} {\mkern 1mu} A{l^{3 + }}

which will have the largest and the smallest size respectively

View answer and explanation

Correct option: A

Mg,\,A{l^{3 + }}

Option A (

Mg, Al^{3+}

) is correct because cations are smaller than their parent atoms, and the size decreases with increasing positive charge. Anions are larger than their parent atoms.

Revision notes and key takeaways

Review CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 184 single-correct-answer MCQs on CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES.
✓ Try each question before opening its answer. Read the explanation where one is available.
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