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Periodic Table – GK Quiz with Answers – Level 2

Medium-level periodic table GK on Döbereiner's triads, Newlands' octaves, Mendeleev's Eka elements, Moseley's atomic number, periodic trends and metalloids, with explanations.

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Questions, answer key and solutions.

Questions
50
Duration
30 min
Marks
50

Negative marking

Attempts
100
Access
Free
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Normal practice, or a Simulated test

Both use the same questions. Normal practice is untimed and needs no account: choose an option and the answer and solution appear at once. The Simulated test is the real computer-based format, with one 30-minute clock, a question palette and full screen, and your score, the key and the solutions arrive when you submit.

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Untimed

Every question on one page, loading as you scroll. Choose an option and see straight away whether it was right.

  • No timer. Nothing to start and nothing to submit. Stop whenever you like.
  • Answered as you choose. Tap an option and it is marked at once, with the correct answer shown.
  • Solutions in place. The explanation, and the video where one has been added, sit under the question.
  • Open to guests. Normal practice needs no sign-in.
Real exam conditions

Simulated

Timed CBT

The computer-based test format: one clock, a question palette, and a score the moment you submit.

  • A clock that does not pause. 30 minutes from the moment you begin, and the paper is submitted for you when it reaches zero.
  • Question palette. Answered, not answered and marked for review, section by section, as the real interface has it.
  • Full screen, proctored. The test takes over the screen; leaving it three times submits the paper.
  • Answers hidden until you submit. The key, the explanations and your score all arrive together at the end.

About this test

Periodic Table GK Practice Quiz Level 2: Classification History and Trends

Periodic Table GK Quiz Level 2 is a medium-level chemistry set for General Awareness. It covers how scientists classified the elements and the trends seen in the modern periodic table. It runs from Döbereiner's triads and Newlands' octaves to Mendeleev's Eka elements and Moseley's atomic number, and Aptitude360 explains every answer.

Topics covered in this Periodic Table GK set

  • Early classification: Döbereiner's triads and Newlands' Law of Octaves, with its musical-note comparison and its failure for heavier elements
  • Mendeleev's table: arrangement by atomic mass and chemical properties, gaps for undiscovered elements and the Sanskrit prefix Eka
  • Predicted elements: Eka-boron, Eka-aluminium and Eka-silicon matched with their modern names
  • Moseley and the Modern Periodic Law: atomic number as the more fundamental property
  • Periodic trends: atomic size and metallic character across periods and down groups
  • Metalloids: border-line elements such as boron, silicon and arsenic

Key concepts for periodic table revision

  • Rising nuclear charge pulls electrons closer across a period
  • New shells make atoms larger down a group
  • Same number of valence electrons explains similar behaviour within a group
  • Using atomic number fixed the ordering problems that atomic mass caused in Mendeleev's table

How to revise classification of elements

  • Make a timeline of Döbereiner, Newlands, Mendeleev and Moseley for chronology questions
  • Keep a two-column list of each Eka element and the element later discovered
  • Tie every trend to its cause instead of memorising directions alone

Who this Level 2 set suits

It suits General Awareness aspirants who know periodic table basics and want medium-level revision on its history and trends.

FAQs about Periodic Table – GK Quiz with Answers – Level 2

What is the modern periodic law?
The modern periodic law states that the properties of elements are a periodic function of their atomic numbers. It replaced Mendeleev's law, which was based on atomic mass.
How many groups and periods are there in the modern periodic table?
The modern periodic table has 18 vertical columns called groups and 7 horizontal rows called periods.
Why did Mendeleev leave gaps in his periodic table?
He left gaps for elements that had not yet been discovered and predicted their properties. Eka-aluminium and Eka-silicon were later discovered as gallium and germanium.
Why does atomic size decrease across a period?
Across a period the nuclear charge increases while electrons are added to the same shell. The stronger pull draws the electrons closer to the nucleus, so the atom becomes smaller.

Test structure

How the paper is split, and how long each part runs. A section you have finished cannot be returned to.

SectionQuestionsTime
Periodic Table GK Level 25030 min

Marking & rules

Total marks
50 across 50 questions.
Negative marking
A wrong answer costs marks. Leaving a question unanswered costs nothing.
Attempts
100 in total. An attempt is spent the moment you begin one.

What you get when you submit

The analysis is ready the moment you submit the paper.

Score and accuracy

Marks, percentage, right, wrong and skipped, and the time you took.

Section by section

The same figures for each section, so a weak one cannot hide in an average.

The full answer key

Every question with your answer, the right one, the working, and the video where there is one.

Where you stand

Your score against the spread of everyone else who has sat this test.

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