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.2 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) 1s2 2s2 2p6 3s1
(B) 1s2 2s2 2p4
(C) 1s2 2s2 2p6
(D) 1s2 2s2 2p6 3s2
Answer
Answer: (a)