📚NCERT Questions — CBSE11
591 solved questions with detailed explanations
The decomposition of calcium carbonate, CaCO3(s) → CaO(s) + CO2(g), is NOT a redox reaction because:
What is the oxidation number of the Mg2+ ion?
The result of 2.5 x 1.25 should be reported with how many significant figures?
If the standard Gibbs energy change (ΔG°) for a reaction is negative, what does this indicate about the equilibrium constant K?
If ΔU° of combustion of methane (CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l)) is -X kJ mol⁻¹, what is the value of ΔH°?
Which type of system allows the exchange of both energy and matter with its surroundings?
An electron is in a 3d orbital. What are the possible values of n, l, and m_l for this electron?
What is the key concept introduced by Pauling to explain the characteristic shapes of polyatomic molecules?
Neutrons were discovered by Chadwick in 1932 by bombarding a thin sheet of beryllium with:
In the reaction Fe3+(aq) + SCN-(aq) <=> [Fe(SCN)]2+(aq), which is deep red, what happens if oxalic acid (H2C2O4) is added, which reacts with Fe3+ ions?