📚NCERT Questions
1,675 solved questions with detailed explanations
Balance the equation: HNO₃ + Ca(OH)₂ → Ca(NO₃)₂ + H₂O. What is the sum of the coefficients of the balanced equation?
Calculate the oxidation number of boron in NaBH4.
For the combustion of 1g of graphite in a bomb calorimeter, ΔU = -20.7 kJ. If the reaction is C(graphite) + O₂(g) → CO₂(g), and Δn_g = 0, what is ΔH for the combustion of 1 mol of graphite?
The Aufbau principle states that in the ground state of atoms, orbitals are filled in the order of their:
The energy barrier for rotation around the C-C bond in ethane is small (1-20 kJ mol-1). This barrier is attributed to:
After whitewashing with slaked lime, a shiny finish appears on the walls after two to three days. What compound is responsible for this shiny finish?
How are hydrogen atoms balanced in the final step of the oxidation number method?
A reagent that takes away an electron pair from a reactive site is called an:
For the reaction 2Cl(g) → Cl₂(g), what are the signs of ΔH and ΔS?
What is the chemical formula of the solid residue formed when lead nitrate is heated?