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NEET UG Equilibrium — practice questions — page 5

Explore 150 free Equilibrium questions in NEET UG Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Equilibrium questions and exercises with answers

Showing questions 121–150 of 150.

Changing pressure has no effect on the equilibrium position ofRead the answer and worked solution →Adding an inert gas to an equilibrium mixture at constant volume willRead the answer and worked solution →Raising the temperature of an exothermic equilibrium causes its K toRead the answer and worked solution →Cooling an NO2 and N2O4 mixture in a freezing mixture makes its brown colourRead the answer and worked solution →A catalyst added to a reaction at equilibrium willRead the answer and worked solution →Compared with its conjugate base, a conjugate acid hasRead the answer and worked solution →In NH3 + H2O to NH4+ + OH-, the conjugate acid of NH3 isRead the answer and worked solution →When water donates a proton to ammonia, its conjugate base formed isRead the answer and worked solution →What is the conjugate acid of the amide ion NH2-?Read the answer and worked solution →If a Bronsted acid is very strong, its conjugate base isRead the answer and worked solution →In the Lewis concept, a base is a species thatRead the answer and worked solution →BF3 has no proton yet acts as an acid by reacting with NH3. It is aRead the answer and worked solution →A bare proton in water bonds to a water molecule and exists asRead the answer and worked solution →An acid-base equilibrium lies on the side that formsRead the answer and worked solution →A very weak acid has a conjugate base that isRead the answer and worked solution →In pure water at 298 K, the hydronium ion concentration isRead the answer and worked solution →A NaOH solution has [OH-] = 10^-4 M at 25 C. Its pH isRead the answer and worked solution →If the pH of a solution falls by one unit, its H+ concentrationRead the answer and worked solution →A soft drink has [H+] = 3.8 x 10^-3 M. Its pH is closest toRead the answer and worked solution →What is the approximate pH of a 1.0 x 10^-8 M HCl solution?Read the answer and worked solution →The pH of normal human blood is aboutRead the answer and worked solution →For weak acids at the same temperature, a larger Ka means the acid isRead the answer and worked solution →Adding sodium acetate to acetic acid solution lowers the acid's ionisation. This is theRead the answer and worked solution →pKa of acetic acid is 4.76 and pKb of NH4OH is 4.75. The pH of ammonium acetate is aboutRead the answer and worked solution →A mixture of acetic acid and sodium acetate acts as a buffer around which pH?Read the answer and worked solution →Which pair forms a basic buffer solution?Read the answer and worked solution →Adding NaCl to a saturated AgCl solution changes the solubility of AgCl byRead the answer and worked solution →A salt precipitates from solution when its ionic productRead the answer and worked solution →For a dibasic acid H2X, how do its two ionisation constants compare?Read the answer and worked solution →Phenolphthalein shows different colours in acid and base because it isRead the answer and worked solution →

Worked practice questions

Changing pressure has no effect on the equilibrium position of

  1. N2O4 to 2NO2
  2. 2SO2 + O2 to 2SO3
  3. H2 + I2 to 2HI
  4. PCl5 to PCl3 + Cl2
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Correct answer: C. H2 + I2 to 2HI

Both sides have two moles of gas, so a pressure change cannot favour either direction.

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Adding an inert gas to an equilibrium mixture at constant volume will

  1. shift it forward
  2. shift it backward
  3. leave it unchanged
  4. raise the value of K
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Correct answer: C. leave it unchanged

At constant volume the partial pressures and molar concentrations of the reacting gases stay the same.

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Raising the temperature of an exothermic equilibrium causes its K to

  1. become zero
  2. decrease
  3. stay the same
  4. increase
Show answer and solution

Correct answer: B. decrease

Heat acts as a product of an exothermic reaction, so heating favours the reverse reaction and lowers K.

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More Chemistry topics

Amines and BiomoleculesChemical KineticsAldehydes, Ketones and Carboxylic AcidsRedox ReactionsHydrocarbonsChemical Bonding and Molecular StructureSolutionsStructure of Atom