The Hydrogen and Its Compounds – Higher Difficulty Problems section is designed to challenge students with multi-concept, high-thinking-level problems commonly encountered in JEE Advanced, Olympiads, CUET-UG (top percentile), and undergraduate chemistry examinations. This module goes beyond routine questions and emphasizes deep conceptual linkage, logical elimination, and exception handling.
In this section, you will solve problems involving:
Comparative behavior of hydrogen with alkali metals and halogens under different chemical environments
Multi-step reaction pathways of hydrogen, water, and hydrogen peroxide
Redox-intensive problems based on the dual nature of hydrogen and H₂O₂
Hydrogen bonding anomalies – boiling point, viscosity, and structure-property relationships
Water chemistry puzzles – density anomaly, solvation effects, and dielectric reasoning
Interlinked conceptual traps drawn from NCERT footnotes and exceptions
Assertion–reason and matrix-match problems requiring elimination logic
Graph- and data-based questions involving stability, enthalpy, and reaction feasibility
The content is structured to strengthen analytical depth, improve logical accuracy under pressure, and prepare students for high-stakes, non-routine examination questions.
Master these higher-difficulty problems to develop the confidence needed for top-rank performance in Inorganic Chemistry, especially in the chapter Hydrogen and Its Compounds.
Q. In which of the following coordination compounds does hydrogen act as a ligand?
A.
[Fe(H2O)6]2+
B.
[Cu(NH3)4]2+
C.
[CoCl4]2-
D.
[Ag(CN)2]-
Solution
In the complex [Fe(H2O)6]2+, water (H2O) acts as a ligand, coordinating with the iron ion.
