300+ TOP MCQs on Periodic Classification of Elements and Answers

NEET  Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Periodic Classification of Elements Multiple Choice Questions

MCQs on Periodic Classification of Elements :

1. Find the successive elements of the periodic table with ionisation energies, 2372, 520 and 890 kJ per mol respectively
(A) Li, Be, B
(B) H, He, Li
(C) B, C, N
(D) He, Li, Be

Answer

Answer: (d)

2. In the modern periodic table, the number of period of the element is the same as
(A) principal quantum number
(B) atomic number
(C) azimuthal quantum number
(D) atomic mass

Answer

Answer: (a)

3. The correct order for the size of I, I+, I is
(A) I > I > I+
(B) I > I> I
(C) I > I > I+
(D) I+ > I > I

Answer

Answer: (c)

4. For the same value of n, the penetration power of orbital follows the order
(A) s = p = d = f
(B) p > s > d > f
(C) f < d < p < s
(D) s < p < d < f

Answer

Answer: (c)

5. Which of the reactions will need the maximum amount of energy?
(A) Na → Na+ e
(B) Ca+ → Ca++ + e
(C) K+ → K+ ++ e
(D) C2+ → C3+ + e

Answer

Answer: (c)

6. Which of the following statements is incorrect?
(A) I.E.1 of O is lower than that of N but I.E.O is higher than that of N
(B) The enthalpy of N to gain an electron is almost zero but of P is 74.3 kJ mol-1
(C) isoelectronic ions belong to the same period
(D) The covalent radius of iodine is less than its Van der Waal’s radius

Answer

Answer: (c)

7. The correct order of electronegativity is
(A) Cl > F > O > Br
(B) F > O > Cl > Br
(C) F > Cl > Br > O
(D) O > F > Cl > Br

Answer

Answer: (b)

8. Two different beakers contain M1-O-H, and M2-O-H solutions separately. Find the nature of the two solutions if the electronegativity of M1 = 3.4, M2 = 1.2, O = 3.5, H = 2.1
(A) acidic, acidic
(B) basic, acidic
(C) basic, basic
(D) acidic, basic

Answer

Answer: (d)

9. Which one is the most acidic among these?
(A) MgO
(B) CaO
(C) Al2O3
(D) Na2O

Answer

Answer: (c)

10. Which one will have the highest 2nd ionisation energy?
(A) 1s2s2p3s1
(B) 1s2s2p4
(C) 1s2s2p6
(D) 1s2s2p3s2

Answer

Answer: (a)

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