Previous year questions with solutions · 2024 – 2026
| Year | Questions | Papers | Avg / paper | Weightage |
|---|---|---|---|---|
| 2026 | 20 | 19 | 1.1 | 4.21% ▲ 25% vs last year |
| 2025 | 16 | 19 | 0.84 | 3.37% ▲ 6.4% vs last year |
| 2024 | 19 | 20 | 0.95 | 3.17% |
First and second ionization enthalpies of lithium are 520 kJ mol-1 and 7297 kJ mol-1 respectively. Energy required to convert 3.5 mg lithium (g) into Li2+(g) [ Li(g) Li2+(g)] is kJ. (nearest integer) [Molar mass of Li = 7 g mol-1]
Among the following oxides of p-block elements, number of oxides having amphoteric nature is . Cl2O7, CO, PbO2, N2O, NO, Al2O3, SiO2, N2O5, SnO2
If IUPAC name of an element is "Unununnium" then the element belongs to nth group of Periodic table. The value of n is .