Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AIIMS2017ChemistryIonic Equilibrium

ZnO is white when cold and yellow when heated. It is due to the development of

Options

  1. ANa ₂ CO ₃+ NaOH
  2. BNaHCO ₃+ Na ₂ CO ₃
  3. CNaHCO ₃+ NaOH
  4. DNaOH + NaCl

Correct answer

C. NaHCO ₃+ NaOH

Step-by-step solution

NaHCO ₃ is a sodium salt of weak acid, while NaOH is a strong base so, they react and cannot exist together in solution. NaHCO ₃+ NaOH Na ₂ CO ₃+ H ₂ O

Practice Ionic Equilibrium on Quantrex Academy →

More from Ionic Equilibrium

What amount of NaOH should be dissolved in a 500 mL solution, so that the p ^ H of solution is 12 at 298 K ? 2026Which of the following buffer solutions is used for precipitation of cations of the III A group? 2026The degree of dissociation of weak acid is directly proportional to 2026Which from the following is Lewis base? 2026The solubility of Fe(OH) ₃ is x mole per liter. Find its K_ sp . 2026The Basic buffer solution is made with 0.1 M NH ₄ OH and 0.2 M NH ₄ Cl . If K_b for the base is 1.8 10⁻⁵ , what is the pH of the buffer? 2026The hydrogen ion concentration of the ocean is about 2 10⁻⁹ M . What is the pOH of ocean? 2026Calculate the dissociation constant of a weak monobasic acid if it is 0.04% dissociated in a 0.01M solution. 2026 Full Ionic Equilibrium list All AIIMS PYQs