📚NCERT Questions — CBSE11
591 solved questions with detailed explanations
In the reaction H2(g) + I2(g) <=> 2HI(g), if H2 is added to the reaction mixture at equilibrium, what happens according to Le Chatelier's principle?
What is hybridisation?
Indicate the number of unpaired electrons in Si (Z=14).
For a reaction, the standard Gibbs energy change (Δ_r G°) at 298 K is -13.6 kJ mol⁻¹. Calculate the equilibrium constant (K) for this reaction. (R = 8.314 J K⁻¹ mol⁻¹)
According to IUPAC convention, if heat is transferred from the system to the surroundings, what is the sign of 'q' and its effect on internal energy?
What is the oxidation number of an atom in its free or uncombined state, such as in O2 or P4?
A compound contains 4.07% hydrogen, 24.27% carbon, and 71.65% chlorine. What is the sum of these percentages?
Which type of chemical equilibrium reaction is characterized by comparable concentrations of reactants and products at equilibrium?
Which type of orbital is spherically symmetric?
Which of the following is an important feature of the quantum mechanical model of the atom?