MCQ practice · SSC Chemistry Board questions · Chapter 4: Periodic Table
How many horizontal rows were there in Mendeleev's periodic table?
Think it through first, then pick an option.
- a 63
- b 18
- c 12
- d 8
Answer and explanation
Correct answer: c 12
Mendeleev's chart had 12 horizontal rows.
Why the other options are wrong
- a 63: 63 was the number of known elements Mendeleev arranged. The answer is 12.
- b 18: 18 is the number of groups in the modern table. The answer is 12.
- d 8: 8 was the number of vertical columns in Mendeleev's chart. The answer is 12.
Your account is open, so all 30,000+ MCQs from every chapter are yours. Start practising SSC Chemistry →
Want to keep going?
A free account carries you on to the next questions and opens 30,000+ MCQs from every chapter. Join before launch and Chirkut bundles are 60% off.
The ones you missed, worth one more look