Periodic Table & Periodicity: NEET Chemistry Previous Year Questions

322 previous year questions from Periodic Table & Periodicity. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. 1.Inert gases have positive electron gain enthalpy. Its correct order is
2. 2.The group having isoelectronic species is:
3. 3.For one of the element various successive ionization enthalpies (in $\text{kJ}{\text{mol}}^{-1}$ ) are given below : I.E. $1^{\text{st}}$ $2^{\text{nd}}$…
4. 4.In which of the following the elements are in correct order of their chemical reactivity in terms of oxidizing property?
5. 5.For electron gain enthalpies of the elements denoted as ${∆}_{eg}$H, the incorrect option is :
6. 6.The correct statements among $I$ to $\text{III}$ regarding group $13$ element oxides are, (I) Boron trioxide is acidic. (II) Oxides of aluminium and gallium are amphot…
7. 7.Assertion: The first ionization energy of Be is greater than that of B. Reason: 2p orbital is lower in energy than 2s.
8. 8.The correct order of bond dissociation enthalpy of halogen is :
9. 9.Given below are two statements : Statement (I) : Both metal and non-metal exist in p and d-block elements. Statement (II) : Non-metals have higher ionisation enthalpy and…
10. 10.The second ionisation energies of $\text{Li}\text{,}\text{Be}\text{,}B$ and $C$ are in the order_____
11. 11.Identify the incorrect match Name IUPAC Official Name A. Unnilunium (i) Mendelevium B. Unniltrium (ii) Lawrencium C. Unnilhexium (iii) Seaborgium D. Unununnium (iv) Darms…
12. 12.Consider the elements $\text{Ne}\text{,}\text{Na}\text{,}\text{Mg}$. The element with highest first ionization enthalpy and element with lowest second ionization enthalp…
13. 13.The lanthanide contraction is responsible for the fact that:
14. 14.The correct order of the first ionization enthalpy is
15. 15.The electron affinity value are negative for A. $\text{Be}\to {\text{Be}}^{-}$ B. $N\to N^{-}$ C. $O\to O^{2-}$ D. $\text{Na}\to {\text{Na}}^{-}$…
16. 16.The ionic radii (in Å) of $N^{3-}$, $O^{2-}$ and $F^{-}$ are respectively :
17. 17.With which of the following electronic configuration an atom has the lowest ionisation enthalpy?
18. 18.The increasing order of the first ionization enthalpies of the elements B, P, S and F (lowest first) is:
19. 19.Which one among the following statements is/are not correct? I. Ba compounds, generally are more covalent than Be compounds. II. The electron gain enthalpy of…
20. 20.The correct order of metallic character is
21. 21.The correct order of the atomic radii of $C\text{,}\text{Cs}\text{,}\text{Al}$, and $S$is :
22. 22.The incorrect statement among the following is:
23. 23.The first ionisation energies (in $\text{kJ}{\text{mol}}^{-1}$ ) of four consecutive elements of the second period are given in the options. The first ionisation energy…
24. 24.Match List-I with List-II (matching question)
25. 25.In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively.