Periodic Classification of Elements MCQ for NEET Chemistry with Answers

Periodic Classification of Elements MCQ: Periodic Classification of Elements is an important topic in chemistry that organizes elements based on their properties. Understanding this topic is vital for the NEET exam. The NEET MCQ questions on the Periodic Classification of Elements are designed to test your knowledge of the Class 11 chapter on the periodic table. These questions cover trends like atomic radius, ionization energy, electron affinity, and electronegativity. Practicing Periodic Classification of Elements Class 11 MCQ For NEET will enhance your ability to predict element behavior and solve related problems efficiently.

Periodic Classification of Elements MCQ

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Periodic Classification of Elements MCQ Class 11

Periodic Classification of Elements MCQs NEET

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1. Atomic wt. of P is 31 and Sb is 120. What will be the atomic wt. of As, as per Dobereiner triad rule:-

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

2. The law of octaves states,

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.

3. Which of the following sets of elements follows Newland's octave rule:-

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

4. Which of the following statements 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.

5. Which of the following statements is incorrect about Lothar Meyer's classification?

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.

6. According to Lothar Meyer's curve, which of the following statements is incorrect?

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.

7. Elements that occupied position in the Lothar Meyer curve, on the peaks, were:

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

8. Which one of the following statements is incorrect 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

9. Mendeleev's periodic table is based on:-

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

10. Mark the group that has a maximum number of elements in Mendeleev's periodic table:

1. I
2. II
3. III
4. IV

11. What were the main demerits 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)

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

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

1. Both Assertion (A) and Reason (R) are True and the Reason (R) is a correct explanation of the Assertion (A).
2. Both Assertion (A) and Reason (R) are True but Reason (R) is not a correct 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.

13. The places that were left empty by Mendeleev were, for:

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

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

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

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

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

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

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

17. Which one is the correct 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 atomic numbers of the elements.
4. In the original Mendeleev periodic table, the elements were classified on the basis of their atomic masses.

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

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

19. For which of the following elements the sequence 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)

20. Which of the following 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. Hydrogen element was not properly placed

21. Statement I: The atomic weight of Cl is 35.5 and I is 127 and the atomic weight of Br, as per Dobie Reiner's triad rule is 81.2

Statement II: Elements that occupy descending positions on the Lothar Meyer curve are halogens.

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.

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

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

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

1. 107
2. 118
3. 126
4. 102

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

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

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

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

26. Which of the following statements is correct?

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

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

Statement II: Both helium and beryllium are chemically inert.

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.

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

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

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

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

30. Without looking at the periodic table select 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

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

Reason: All the elements of group 18 have stable configurations.

1. Both Assertion (A) and Reason (R) are True and the Reason (R) is a correct explanation of the Assertion (A).
2. Both Assertion (A) and Reason (R) are True but Reason (R) is not a correct 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