NEET Questions on Periodic Classification of Elements

NEET questions on Periodic Classification of Elements consist of important MCQs from the 3rd chapter of Class 11th. It is an important topic in the NEET Chemistry syllabus that includes various organic and inorganic elements and their properties. The elements are divided into various groups based on their chemical behaviour and properties to form a newly discovered element. 

The trending questions come from topics like atomic radius, electron affinity, ionization energy, electronegativity and so on. Practising NEET Exam questions on NEET periodic classification of elements will help students to recall the concepts better during the exam. Students must practice these MCQ questions daily to understand the element breakdown theory behind every organic and inorganic element which will make their preparation easier. In this article, solve the NEET questions on the periodic table and classification of elements and more.

List of NEET Questions on Periodic Classification of Elements

Students can find the list of NEET Questions on the Periodic Classification of Elements given below. 

1. The atomic weight of P is 31 and Sb is 120. What is the atomic weight of As, as per the Dobereiner triad rule:-

1. 151 
2. 75.5
3. 89.5 
4. Unpredictable

Answer: 2

2. The law of octaves says that,

1. every eighth element had properties similar to the first element
2. every third element had properties similar to the first element
3. the properties of the middle element were in between the other two members
4. the properties of the elements were repeated after regular intervals of 3,4 or 8 elements.

Answer: 1

3. Which of the following sets of elements given below follows Newland’s octave rule:-

1. Be, Mg, Ca 
2. Na, K, Rb
3. F, Cl, Br 
4. B, Al, Ga

Answer: 1

4. Which of the following statements given below is incorrect about Lothar Meyer’s curve?

1. The halogens (F, Cl, Br, I) occupy positions on the descending portions of the curve.
2. The alkali metals occupy the maxima of the curve.
3. The transition metals occupy the minima of the curve.
4. The alkaline earth metals occupy positions at about midpoints on the descending portions of the curve.

Answer: 1

5. Which of the statements is incorrect about Lothar Meyer’s classification stated below?

1. The elements present at the peaks are chemically very reactive.
2. Alkaline earth metals are present at the descending position of the curve.
3. Representative elements are present at the bottom of the curve.
4. Halogens occupy the ascending position of the curve.

Answer: 3

6. According to Lothar Meyer’s curve, which of the following statements is not correct?

1. The elements having the same properties will occupy the same position in the curve.
2. Alkaline Earth metals are at the peaks of the curve.
3. Halogens are the ascending part of the curve.
4. The atomic volumes of elements in a period initially decrease and then increase.

Answer: 2

7. Which of the Elements occupied position in the Lothar Meyer curve, on the peaks:

1. Alkali metals
2. Highly electropositive elements
3. Elements having a large atomic volume
4. All of these

Answer: 4

8. Which one of the following statements is not valid for modern Mendeleev’s periodic table?

1. It consists of nine groups.
2. It consists of seven periods.
3. Each group has an equal number of elements.
4. Each period except the first period starts with the element of the alkali group.

Answer: 3

9. Mendeleev’s periodic table is based on which of the following:-

1. Atomic number
2. Increasing the order of the number of protons
3. Electronic configuration
4. None of these

Answer: 4

10. Select the group that has a most number of elements in Mendeleev’s periodic table:

1. I 
2. II
3. III 
4. IV

Answer: 3

11. What were the main disadvantages of Mendeleev’s periodic table?

(i) Hydrogen has been placed in group I though it resembles group VII as well.

(ii) The position of some elements was not justified.

(iii) Isotopes were not given separate places.

(iv) Lanthanides and actinides were not included in the table.

1. (i), (ii) and (iii) 
2. (i), (ii), (iii) and (iv)
3. (ii) and (iv) 
4. (i), (iii) and (iv)

Answer: 2

12. Assertion (A): According to Mendeleev's theory, the elemental properties are a periodic function of their atomic weights. 

Reason (R): Mendeleev left a space under aluminium and a gap under silicon, and named these elements Eka- Aluminium and Eka-Silicon.

1. Both Assertion (A) and Reason (R) are True and the Reason (R) is the right explanation of the Assertion (A).
2. Both Assertion (A) and Reason (R) are True but Reason (R) is not the right explanation for Assertion (A).
3. Assertion (A) is True but the Reason (R) is False.
4. Assertion (A) is False but Reason (R) is True.

Answer: 2

13. The places in the periodic table that were left empty by Mendeleev were, for:

1. Aluminium and Silicon
2. Galium and germanium
3. Arsenic and antimony
4. Molybdenum and tungsten

Answer: 2

14. Which of the following is not an anomalous pair of elements in Mendeleev’s periodic table:

1. Ar and K 
2. Co and Ni
3. Te and I 
4. Al and Si

Answer: 4

15. Whose name is not aligned with the development of the periodic table?

1. Prout’s 
2. Newlands
3. Rutherford 
4. Lothar Meyer

Answer: 3

16. The plot of the square root of the frequency of X-ray emitted against atomic number leads to the suggestion of which law/rule?

1. Periodic law 
2. Modern periodic law
3. Hund’s rule 
4. Newland’s law

Answer: 2

17. Which one is the right statement?

1. ‘Law of octaves’ was proposed by Döbereiner.
2. ‘Law of triads’ was proposed by Newland.
3. Mendeleev’s periodic law is based on the atomic numbers of the elements.
4. In the original Mendeleev periodic table, the elements were classified based on their atomic masses.

Answer: 4

18. The elemental properties of the elements are a periodic function of their atomic numbers. This statement was mentioned by:

1. Bohr 
2. Mendeleev
3. Döbereiner 
4. Moseley

Answer: 4

19. For which of the following elements the format of increasing atomic masses was inverted in Mendeleev’s periodic table?

1. Cobalt (Co) and nickel (Ni)
2. Potassium (K) and calcium (Ca)
3. Lithium (Li) and sodium (Na)
4. Beryllium (Be) and magnesium (Mg)

Answer: 1

20. Which of the following given is not correct for Mendeleev’s periodic table?

1. Element properties were a periodic function of their atomic numbers
2. It could predict the existence of other elements and left spaces for them
3. The position of isotopes was not fixed
4. The hydrogen element was not properly placed

Answer: 1

21. Statement I: The atomic weight of Cl is 35.5 and I am 127 and the atomic weight of Br, based on Dobie Reiner’s triad rule is 81.2, is it correct or incorrect?

Statement II: Elements that occupy descending orders on the Lothar Meyer curve are halogens. Is it correct or incorrect?

1. Both Statements I and II are correct.
2. Both Statements I and II are incorrect.
3. Statement I is correct and Statement II is incorrect.
4. Statement I is incorrect and Statement II is correct.

Answer: 3

22. The long form of the periodic table was based on which of the following:

1. Atomic number 
2. Atomic mass
3. Atomic volume 
4. Effective nuclear charge

Answer: 1

23. Which of the elements whose atomic numbers are stated below, cannot be arranged in the present setup of the long form of the periodic table?

1. 107 
2. 118
3. 126 
4. 102

Answer: 3

24. Which of the following elements below shown as pairs with their atomic numbers belong to the same periodic table?

1. Z = 19 and Z = 38 
2. Z = 12 and Z = 17
3. Z = 11 and Z = 21 
4. Z = 16 and Z = 35

Answer: 2

25. To which group, an element with atomic number 88 belongs?

1. Group 12 
2. Group 17
3. Group 10 
4. Group 2

Answer: 4

26. Which of the following statements is right?

1. Elements of the 3d and 4d series are kept distinguished in the periodic table.
2. Elements of the 4f and 5f series are kept distinguished in the periodic table.
3. Elements of 5p and 6p-series are kept distinguished in the periodic table
4. All of them

Answer: 2

27. Statement I: Helium and beryllium have similar outer layer electronic configurations of the type ns2

Statement II: Both helium and beryllium are chemically inert. Which of these is true?

1. Both Statements I and Statement II are correct.
2. Both Statements I and Statement II are incorrect.
3. Statement I is correct and Statement II is incorrect.
4. Statement I is incorrect and Statement II is correct.

Answer: 3

28. Statement-1: Removal of s-electron is relatively more difficult than of p-electron of the same main shell.

Statement-2: s-electrons are more close to the nucleus than p-electrons of the same shell and hence, are strongly attracted by the nucleus.

1. Both Statement I and Statement II are correct.
2. Both Statement I and Statement II are incorrect.
3. Statement I is correct and Statement II is incorrect.
4. Statement I is incorrect and Statement II is correct.

Answer: 1

29. In transition elements, the incoming electron occupies (n–1) d subshell, in pirority to:

1. np-level 
2. ns-level
3. (n–1) p–level 
4. (n+1) s-level

Answer: 1

30. Without looking at the periodic table choose from each of the following lists, the elements belonging to the same group:

1. Z = 12, 38, 4, 88 
2. Z = 9, 16, 3, 35
3. Z = 5, 11, 27, 19 
4. Z = 24, 47, 42, 55

Answer: 1

31. Assertion: Group 18 contains elements that are in the gaseous state under ordinary atmospheric conditions.

Reason: All the group 18 elements have stable configurations.

1. Both Assertion (A) and Reason (R) are True and the Reason (R) is the right explanation of the Assertion (A).
2. Both Assertion (A) and Reason (R) are True but Reason (R) is not the right explanation of the Assertion (A).
3. Assertion (A) is True but the Reason (R) is False.
4. Assertion (A) is False but Reason (R) is True

Answer: 2

These were a set of important questions that students had to practice along with various question sets, sample papers and mock papers for good scores. Students must refer to the best NEET books for Chemistry to plan their preparation strategy and achieve their desired scores. They must also refer to NEET previous years' question papers to understand the question trends, exam format, marking scheme and exam pattern. NEET questions on the periodic table and classification of elements will not only help students prepare for the examination better but will also aid them in evaluating their preparation levels.

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