📚NCERT Questions — CBSE11
591 solved questions with detailed explanations
According to Arrhenius theory, what defines a base?
What does a Kc value in the range of 10^-3 to 10^3 indicate about the composition of an equilibrium mixture?
What is the first step in balancing a redox reaction using the oxidation number method?
An atomic orbital has n=3. What are the possible values of l and m_l?
A 100-watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second. (h = 6.626 x 10⁻³⁴ J s, c = 3.00 x 10⁸ m s⁻¹)
Which concentration term is independent of temperature?
Calculate the oxidation number of sulfur in NaHSO4.
A reaction has a positive enthalpy change (ΔH > 0) and a positive entropy change (ΔS > 0). Under what conditions can this reaction be spontaneous?
In the reaction 2 HgO (s) → 2 Hg (l) + O2 (g), what process is occurring for mercury?
Student A reports measurements of 1.95 g and 1.93 g for a true value of 2.00 g. Student C reports 2.01 g and 1.99 g. Which student's measurements are both precise and accurate?