CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES - MCQs

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Chemistry — CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

50 Questions Class 11 MCQs
1
Who proposed the first scientific classification of elements?
(Class XI)
2
Dobereiner’s triads failed mainly because:
(Class XI)
3
In Newlands’ Law of Octaves, properties repeat after every:
(Class XI)
4
Which element violates Newlands’ octave?
(Class XI)
5
Modern periodic law is based on:
(Class XI)
6
Number of periods in modern periodic table:
(Class XI)
7
Number of groups:
(Class XI)
8
Alkali metals belong to group:
(Class XI)
9
Halogens belong to:
(Class XI)
10
Noble gases have valency:
(Class XI)
11
Atomic radius decreases across a period due to:
(NEET)
12
Atomic radius increases down a group because:
(NEET)
13
Element with highest electronegativity:
(Class XI)
14
First ionization energy increases:
(NEET)
15
Which has highest IE1?
(NEET)
16
Metallic character:
(Class XI)
17
Most metallic element:
(JEE)
18
Electron affinity is highest for:
(NEET)
19
Which is smallest?
(Class XI)
20
Isoelectronic species among following:
(JEE)
21
Order of increasing radius:
(JEE)
22
Periodicity arises due to:
(Class XI)
23
Which shows diagonal relationship?
(Class XI)
24
Which is amphoteric?
(NEET)
25
Highest oxidation state shown by halogens:
(Class XI)
26
Element with configuration \(ns^2np^5\):
(Class XI)
27
Which has maximum polarizing power?
(JEE)
28
Most basic oxide:
(JEE)
29
Order of electronegativity:
(JEE)
30
Which is metalloid?
(Class XI)
31
Highest hydration energy:
(JEE)
32
Which pair is isoelectronic?
(JEE)
33
Correct order of IE1:
(JEE)
34
Largest atom:
(JEE)
35
Least reactive halogen:
(Class XI)
36
Strongest oxidizing halogen:
(NEET)
37
Maximum covalent character:
(JEE)
38
s-block elements end with:
(Class XI)
39
Lanthanides belong to:
(Class XI)
40
Which has highest electron affinity?
(JEE)
41
Atomic volume shows periodicity because:
(JEE)
42
Correct order of metallic character:
(JEE)
43
Which is strongest base?
(JEE)
44
Most acidic oxide:
(JEE)
45
Maximum covalent radius:
(JEE)
46
Element with highest charge density:
(JEE)
47
Which pair shows diagonal relationship?
(JEE)
48
Most stable noble gas compound:
(JEE)
49
Periodic properties repeat because:
(JEE Advanced)
50
Correct increasing order of IE1:
(JEE Advanced)
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50 MCQs: Classification of Elements & Periodicity | Class 11 Chemistry
50 MCQs: Classification of Elements & Periodicity | Class 11 Chemistry — Complete Notes & Solutions · academia-aeternum.com
The chapter Classification of Elements and Periodicity in Properties forms the conceptual backbone of modern chemistry, linking atomic structure with observable chemical behavior. These 50 carefully curated multiple-choice questions are designed to reinforce core NCERT concepts while progressively building toward competitive-exam rigor. Beginning with foundational ideas such as historical classifications and periodic laws, the set advances through atomic radii, ionization enthalpy,…
🎓 Class 11 📐 Chemistry 📖 NCERT ✅ Free Access 🏆 CBSE · JEE
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