2020 source guide · Chemistry

NEET 2020 Chemistry Periodic Properties Questions

Use this page to connect the official 2020 paper with current Chemistry practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.

Practice 100 verified questions →Check official NTA archive ↗

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 1 · difficulty 1/5

Which statement correctly expresses Newlands' Law of Octaves?

A. When elements are arranged by increasing atomic mass, every eighth element has properties similar to the first
B. Every group must contain exactly eight elements
C. Atomic masses repeat after every eight elements
D. Only eight chemically distinct elements can exist

Example 2 · difficulty 1/5

Why did Newlands use the word “octaves” for his classification?

A. He identified eight isotopes of every element
B. He compared the recurrence of elemental properties with the similarity of the eighth musical note to the first
C. He divided all elements into eight equal mass ranges
D. He believed that each atom contained eight particles

Example 3 · difficulty 1/5

Up to which element did Newlands' Law of Octaves appear to work satisfactorily?

A. Sodium
B. Chlorine
C. Calcium
D. Iron

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

Classification of Elements and Periodicity in Properties →

Frequently asked questions

Are these official NEET 2020 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 2020 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.