📚NCERT Questions — CBSE11
591 solved questions with detailed explanations
For an element to undergo disproportionation, what must be true about its oxidation states?
Which of the following represents an oxidation half-reaction?
What is the standard state of a substance at a specified temperature?
The work function for caesium atom is 1.9 eV. Calculate the threshold frequency (ν₀). (1 eV = 1.602 x 10⁻¹⁹ J, h = 6.626 x 10⁻³⁴ J s)
Einstein's equation for the photoelectric effect relates the energy of the incident photon (hν) to the work function (hν₀) and the kinetic energy of the ejected electron (½m_ev²). Which option correct
When comparing elements in the same row of the periodic table, what is the primary factor determining acid strength (H-A bond)?
What is the relationship between pH, pOH, and pKw at 298 K?
Why does NH3 have a higher dipole moment than NF3, even though fluorine is more electronegative than hydrogen?
If the enthalpy of combustion of carbon to CO₂ is -393.5 kJ mol⁻¹, calculate the heat released upon formation of 35.2 g of CO₂ from carbon and dioxygen gas.
Copper, silver, and gold are examples of: