NeetVictoryQuestion 1: Periodic Trends: Atomic and Ionic Radius
Which of the following is a metalloid?
- A argon
- B sodium
- C sulphur
- D silicon
Answer: D. silicon
Why: Metalloids have properties between those of metals and non-metals.
NEET Chemistry: Periodic Classification of Properties. Chapter-wise Practice Questions and Test
Periodic Classification of Properties is a Class 11 Chemistry chapter that carries about 3.2% of the Chemistry questions in NEET. Practise it with 42 questions covering 2 topics, each with an explanation.
Practise Periodic Classification of Properties
Open in the appSets of 15 questions that adapt to your level, with an explanation for every answer.
Topics covered in Periodic Classification of Properties
- Periodic Trends: Atomic and Ionic Radius (21 questions)
- Periodic Trends: Ionization Enthalpy and Electronegativity (21 questions)
How often Periodic Classification of Properties has come up in NEET
Across the 13 previous year papers, Periodic Classification of Properties had 14 questions, about 1.1 a year. The most in one paper was 2, in AIPMT 2014.
| Paper | Questions from this chapter |
|---|---|
| NEET 2026 | 1 |
| NEET 2025 | 2 |
| NEET 2024 | 2 |
| NEET 2023 | 1 |
| NEET 2022 | 1 |
| NEET 2021 | 1 |
| NEET 2020 | 1 |
| NEET 2019 | 1 |
| NEET 2018 | 1 |
| NEET 2017 | 0 |
| NEET 2016 | 0 |
| Re-AIPMT 2015 | 1 |
| AIPMT 2014 | 2 |
Sample questions on Periodic Classification of Properties with answers
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
Question 2: Periodic Trends: Ionization Enthalpy and Electronegativity
The element with atomic number 35 belongs to:
- A group 16 and period 4
- B group 15 and period 3
- C group 17 and period 4
- D group 17 and period 3
Answer: C. group 17 and period 4
Why: It is bromine: [Ar] 3d¹⁰ 4s² 4p⁵.
Question 3: Periodic Trends: Atomic and Ionic Radius
Among the isoelectronic ions O²⁻ and F⁻, the larger one is:
- A cannot be said
- B O²⁻
- C F⁻
- D both are equal
Answer: B. O²⁻
Why: O²⁻ has the smaller nuclear charge holding the same 10 electrons.
Question 4: Periodic Trends: Ionization Enthalpy and Electronegativity
Elements in the same group of the periodic table have similar chemical properties mainly because they have the same:
- A atomic mass
- B number of valence electrons
- C number of neutrons
- D atomic radius
Answer: B. number of valence electrons
Why: Elements within a group share the same number of valence electrons, which primarily determines chemical behavior and bonding patterns.
Question 5: Periodic Trends: Atomic and Ionic Radius
An element has the configuration 1s² 2s² 2p⁶ 3s² 3p⁵. It belongs to:
- A group 17 and period 2
- B group 15 and period 3
- C group 7 and period 2
- D group 17 and period 3
Answer: D. group 17 and period 3
Why: The valence shell is n = 3 (third period) with seven valence electrons (3s² 3p⁵), which is group 17.
Question 6: Periodic Trends: Ionization Enthalpy and Electronegativity
The acidic strength of the hydrogen halides in water increases in the order:
- A HCl < HF < HI < HBr
- B HF < HCl < HBr < HI
- C all are equal
- D HI < HBr < HCl < HF
Answer: B. HF < HCl < HBr < HI
Why: The H–X bond becomes weaker down the group.
Question 7: Periodic Trends: Atomic and Ionic Radius
Among the isoelectronic ions Na⁺, Mg²⁺ and F⁻, the one with the smallest radius is:
- A all are equal
- B Mg²⁺
- C F⁻
- D Na⁺
Answer: B. Mg²⁺
Why: With the same number of electrons, the ion with the larger nuclear charge pulls them in more strongly.
Question 8: Periodic Trends: Ionization Enthalpy and Electronegativity
The noble gases have positive electron gain enthalpies because:
- A they are non-metals
- B they have a small radius
- C they have a high electronegativity
- D their stable configuration gives them no tendency to accept an extra electron
Answer: D. their stable configuration gives them no tendency to accept an extra electron
Why: The added electron would go into the next higher shell.
Practise all of Periodic Classification of Properties
Open in the appFrequently asked questions
How many questions come from Periodic Classification of Properties in NEET?
Periodic Classification of Properties carries about 3.2% of the Chemistry questions in NEET. Across the 13 previous year papers on NeetVictory it appeared 14 times, about 1.1 questions a year.
Which class is Periodic Classification of Properties from?
Periodic Classification of Properties is a Class 11 Chemistry chapter in the NCERT syllabus.
Where can I practise Periodic Classification of Properties questions for NEET?
NeetVictory has 42 practice questions on Periodic Classification of Properties, each with an explanation, in sets of 15 that adapt to your level. This page shows a free sample.