Classification of Elements and Periodicity Practice Questions
NEET · Chemistry · 1531 free MCQs with instant results and detailed explanations.
1531
Total
312
Easy
672
Medium
547
Hard
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Topics in Classification of Elements and Periodicity
Periodic Trends
288
Electron Affinity
313
Ionization Energy
317
Modern Periodic Table
303
Electronegativity
310
Sample Questions from Classification of Elements and Periodicity
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of the following elements is found in Group 1 of the modern periodic table?
A.
Sodium
B.
Calcium
C.
Magnesium
D.
Aluminum
Show Answer & Explanation
Correct Answer: A
Sodium is an alkali metal and is located in Group 1 of the periodic table.
Q2
Easy
Which of the following statements is true regarding the periodic table?
A.
Metals are found on the right side
B.
Noble gases are inert under normal conditions
C.
Nonmetals are all gases
D.
Transition metals are in Group 1
Show Answer & Explanation
Correct Answer: B
Noble gases, found in Group 18, are generally inert and do not readily react with other elements.
Q3
Easy
What is the period number of the element Chlorine (Cl) in the periodic table?
A.
2
B.
3
C.
4
D.
5
Show Answer & Explanation
Correct Answer: B
Chlorine is located in the third period of the periodic table, as it has three energy levels.
Q4
Medium
What is the trend of atomic radius in the modern periodic table as we move from left to right across a period?
A.
Increases
B.
Decreases
C.
Remains constant
D.
Increases, then decreases
Show Answer & Explanation
Correct Answer: B
As we move from left to right across a period, the atomic radius decreases due to an increase in nuclear charge, which pulls electrons closer to the nucleus.
Q5
Medium
Which of the following elements belongs to the p-block of the periodic table?
A.
Sodium
B.
Magnesium
C.
Chlorine
D.
Calcium
Show Answer & Explanation
Correct Answer: C
Chlorine is a p-block element, located in group 17, while Sodium and Magnesium are in the s-block, and Calcium is in group 2 of the s-block.
Q6
Medium
Which of the following properties is generally observed with increasing atomic numbers in the periodic table?
A.
Ionization energy decreases
B.
Electronegativity increases
C.
Atomic radius increases
D.
Metallic character decreases
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Correct Answer: D
Generally, as atomic numbers increase across a period, the metallic character of elements decreases because they tend to become more non-metallic.
Q7
Medium
Which of the following elements has the smallest first ionization energy?
A.
Lithium
B.
Beryllium
C.
Sodium
D.
Potassium
Show Answer & Explanation
Correct Answer: D
Potassium has the smallest first ionization energy among the given options because it is further down the group, making it easier to remove the outermost electron.
Q8
Hard
Which of the following elements is expected to have the highest ionization energy?
A.
Neon (Ne)
B.
Fluorine (F)
C.
Sodium (Na)
D.
Chlorine (Cl)
Show Answer & Explanation
Correct Answer: A
Neon has the highest ionization energy because it is a noble gas with a fully filled outer shell, making it more stable and requiring more energy to remove an electron compared to the others.
Q9
Hard
Which of the following statements about the modern periodic table is TRUE?
A.
Elements are arranged according to increasing atomic mass.
B.
Groups contain elements with similar properties.
C.
Periods are horizontal rows that contain elements with different properties.
D.
All elements in a group have the same number of neutrons.
Show Answer & Explanation
Correct Answer: B
In the modern periodic table, elements are arranged in groups based on similar chemical properties due to the same number of valence electrons.
Q10
Hard
If element X is located in group 16 and period 3 of the modern periodic table, what is its most likely oxidation state?
A.
-2
B.
+2
C.
-1
D.
+4
Show Answer & Explanation
Correct Answer: A
Element X, being in group 16, typically has an oxidation state of -2 since it tends to gain two electrons to achieve a stable octet configuration.
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Classification of Elements and Periodicity — NEET Chemistry Practice Questions Online
This page contains 1531 practice MCQs for the chapter Classification of Elements and Periodicity in NEET Chemistry. The questions are organized by difficulty — 312 easy, 672 medium, 547 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.