Example 1 · difficulty 3/5
Which of the following elements has the highest electronegativity on the Pauling scale, but does NOT have the most negative electron gain enthalpy among the halogens?
- A. Cl
- B. F
- C. O
- D. N
2018 source guide · Chemistry
NEET 2018 Chemistry Periodic Properties Questions
Connect the official 2018 paper with current Chemistry practice without labelling original previews as PYQs.
150 original questions · explicit provenance labels
ChemistryPlate 29
NeetVellum atlas · fig. chemistry
29
What to master
periodic trends, effective nuclear charge and anomalous behaviour.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 4/5
Consider the following statements: (i) The first electron gain enthalpy of nitrogen is positive because the added electron must enter a 2p orbital in which all three orbitals are already singly occupied. (ii) Mg²⁺ has a smaller ionic radius than Na⁺. (iii) Electronegativity of elements increases on moving down a group. (iv) The first ionization enthalpy of boron is higher than that of beryllium. The correct statements are:
- A. (i) and (iii) only
- B. (ii) and (iii) only
- C. (i), (ii) and (iv) only
- D. (i) and (ii) only
Example 3 · difficulty 1/5
What was the main scientific need for classifying the growing number of known elements?
- A. To organise elements so that their properties could be studied systematically and related to one another
- B. To make every element react in the same manner
- C. To arrange elements only according to their physical state
- D. To replace experimentally measured properties with assumed values
The evidence-first practice loop
- 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
- 2. Attempt closed-bookExpose the concept or execution gap before rereading.
- 3. Repair and returnClassify the miss and re-practice after a delay.
Canonical chapter practice
Frequently asked questions
Are these official NEET 2018 Chemistry Periodic Properties PYQs?
No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.
How should I use the NEET 2018 paper?
Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.