📚NCERT Questions — CBSE11

Which of the following processes is considered oxidation under the broadened definition?

Which of the following is an example of solid-vapour equilibrium?

Calculate the molarity of NaOH solution if 4 g of NaOH is dissolved in enough water to make 250 mL of solution. (Molar mass of NaOH = 40 g/mol)

A buffer solution is formed by mixing ammonium chloride and ammonium hydroxide. If the pKa value for ammonia is 9.25, what pH would this buffer solution have if the concentrations of the base and its

A 3 M NaCl solution has a density of 1.25 g mL^-1. Calculate its molality. (Molar mass of NaCl = 58.5 g/mol)

Which of the following is a characteristic of a solid state of matter?

According to the (n+l) rule, if two orbitals have the same (n+l) value, which orbital will have lower energy?

3.00 mol of PCl5 is placed in a 1L vessel and allowed to reach equilibrium at 380K. If Kc = 1.80 for PCl5(g) <=> PCl3(g) + Cl2(g), what is the equilibrium concentration of PCl3?

For a polyprotic acid, why are higher order ionization constants (e.g., Ka2, Ka3) typically smaller than the first ionization constant (Ka1)?

Calculate the average oxidation number of sulfur in H2S4O6.