Equilibrium — practice questions
90 curated practice questions from Equilibrium (Chemistry Class 11, CBSE) — 90 easy. Every question includes the final answer free; step-by-step worked solutions with a free account.
- Match the column I with column II and mark the appropriate choice. Column I Column II (A) Liquid ⇌ Vapour (i) Saturated…
- The solubility product of BaCl 2 is 3.2 × 10 –9 . What will be its solubility in mol L –1 ?
- Consider the following graph and mark the correct statement.
- At 473 K, K c for the reaction PCl 5( g ) PCl 3 ( g ) + Cl 2( g ) is 8.3 × 10 –3 . What will be the value of K c for…
- If the equilibrium constant for the given reaction is 0.25 then the equilibrium constant for the reaction will be
- The value of K c for the following equilibrium is CaCO 3( s ) CaO ( s ) + CO 2( g ) . Given K p = 167 bar at 1073 K.
- For the following reaction: NO ( g ) + O 3( g ) NO 2( g ) + O 2( g ) The value of K c is 8.2 × 10 4 . What will be the…
- In the relation, K p = K c ( RT ) D n the value of D n is
- What is observed at equilibrium point in the reaction? PCl 5( g ) PCl 3( g ) + Cl 2( g )
- Match the column I with column II and mark the appropriate choice. Column I Column II (A) CH 3 COONa (i) Almost…
- For the reaction N 2( g ) + O 2( g ) 2NO ( g ) , the value of K c at 800°C is 0.1. What is the value of K p at this…
- What is pOH of an aqueous solution with hydrogen ion concentration equal to 3 × 10 –5 mol L –1 ?
- If the equilibrium constant for the reaction, 2 XY X 2 + Y 2 is 81, what is the value of equilibrium constant for the…
- For a reaction, A x B y x A y+ + yB x – , K sp can be represented as
- In an experiment, NO 2 gas is prepared and taken into 3 test tubes X , Y and Z . NO 2 gas which is brown in colour…
- Which of the following salts with a concentration 0.1 M will give a basic solution?
- Dissociation constants of CH 3 COOH and NH 4 OH in aqueous solution are 10 –5 . If pH of a CH 3 COOH solution is 3…
- At 500 K the equilibrium constant for the reaction H 2( g ) + I 2( g ) 2HI ( g ) is 24.8. If mol/L of HI is present at…
- The following reaction is at equilibrium, In the above reaction, colour intensity of red colour can be increased by
- An acidic buffer solution can be prepared by mixing the solution of
- At 350 K K p for the reaction given below is 3.0 × 10 10 bar –1 at equilibrium. What will be the value of K c at this…
- 18.4 g of N 2 O 4 is taken in a 1 L closed vessel and heated till the equilibrium is reached. N 2 O 4( g ) 2NO 2( g )…
- According to Bronsted – Lowry concept of acids and bases a conjugate acid – base pair can exist as Mark the option in…
- 1 mole of NO and 1 mole of O 3 are taken in a 10 L vessel and heated. At equilibrium, 50% of NO (by mass) reacts with O…
- What is the percentage dissociation of 0.1 M solution of acetic acid? ( K a = 10 –5 )
- A solution containing Mn 2+ , Fe 2+ , Zn 2+ and Hg 2+ with a molar concentration of 10 –3 M each is treated with 10 –16…
- For the reaction a + b c + d , initially concentrations of a and b are equal and at equilibrium the concentration of d…
- Match the column I with column II and mark the appropriate choice. Column I Column II (A) Fe(OH) 3 (i) K sp = s 2 (B)…
- For a reaction, 2SO 2( g ) + O 2( g ) 2SO 3( g ) , 1.5 moles of SO 2 and 1 mole of O 2 are taken in a 2 L vessel. At…
- In the following question, a statement of assertion is followed by a statement of reason. Mark the correct choice…
- In the following reaction : 2NO ( g ) + Cl 2( g ) 2NOCl ( g ) it is observed that equilibrium is not attained and the…
- Predict the direction of the reaction from the comparison of Q c and K c . Mark the incorrect statement.
- For the reaction, 2SO 2( g ) + O 2( g ) 2SO 3( g ) What is K c when the equilibrium concentration of [SO 2 ] = 0.60 M…
- The solubility product of AgCl is 1.8 × 10 –10 . Precipitation of AgCl will occur by mixing which of the following…
- The expression for equilibrium constant, K c for the following reaction is Fe 3+ ( aq ) + 3OH – ( aq ) Fe(OH) 3( s )
- For the reaction PCl 5( g ) PCl 3( g ) + Cl 2 ( g ) , the forward reaction at constant temperature is favoured by
- Equimolar solutions of HF, HCOOH and HCN at 298 K have the values of K a as 6.8 ×10 –4 , 1.8 ×10 –4 and 4.8 ×10 –9…
- Fill in the blanks in the given table with the appropriate choice. Species Conjugate acid Conjugate base HCO 3 – __ p _…
- Which of the following salts does not show its correct nature mentioned against it?
- The expression for equilibrium constant, K c for the following reaction is
- What in the pH of a solution obtained by mixing 10 mL of 0.1 M HCl and 40 mL of 0.2 M H 2 SO 4 ?
- What will be the solubility of AgCl in 0.05 M NaCl aqueous solution if solubility product of AgCl is 1.5 ×10 –10 ?
- At dynamic equilibrium the reaction on both sides occur at the same rate and the mass on both sides of the equilibrium…
- Study the figure given below and mark the correct statement about K c and dependence of extent of reaction on it.
- For the reaction 2NO 2( g ) N 2 O 4 ( g ) , K p / K c is equal to
- What will be the pH of 1 × 10 –4 M H 2 SO 4 solution?
- Which of the following is an example of homogeneous equilibrium?
- Formation of ClF 3 from Cl 2 and F 2 is an exothermic process. The equilibrium system can be represented as Cl 2( g ) +…
- In a vessel N 2 , H 2 and NH 3 are at equilibrium. Some helium gas is introduced into the vessel so that total pressure…
- Which of the following salts will give basic solution on hydrolysis?
- 0.05 mole of NaOH is added to 5 litres of water. What will be the pH of the solution?
- In the following question, a statement of assertion is followed by a statement of reason. Mark the correct choice…
- 5 moles of PCl 5 are heated in a closed vessel of 5 litre capacity. At equilibrium 40% of PCl 5 is found to be…
- Predict if there will be any precipitate by mixing 50 mL of 0.01 M NaCl and 50 mL of 0.01 M AgNO 3 solution. The…
- Solution of a monobasic acid has a pH = 5. If one mL of it is diluted to 1 litre, what will be the pH of the resulting…
- Which of the following reactions will not get affected on increasing the pressure?
- The equilibrium constant for the following reaction will be P 4( s ) + 5O 2( g ) P 4 O 10( s )
- What will be the pH of a soft drink if hydrogen ion concentration in sample is 3.8 × 10 –3 M?
- For which of the following reactions, K p = K c ?
- What is the pH at which Mg(OH) 2 begins to precipitate from a solution containing 0.1 M Mg 2+ ions? [ K sp for Mg(OH) 2…
- Which of the following species can act both as an acid as well as a base?
- If the pH of a solution is 2, the hydrogen ion concentration in moles per litre is
- The reaction 2SO 2 + O 2 2SO 3 + Heat, will be favoured by
- Solubility of CaF 2 is 0.5 × 10 –4 mol L –1 . The value of K sp for the salt is
- Which of the following relations between the reactions and equilibrium constant for a general reaction, aA + bB cC + dD…
- Which of the following is not an application of solubility product?
- The pH of 0.001 M Ba(OH) 2 solution will be
- The concentration of Ag + in a saturated solution of Ag 2 CrO 4 at 20°C is 1.5 × 10 –4 mol L –1 . The solubility…
- NH 4 CN is a salt of weak acid HCN ( K a = 6.2 × 10 –10 ) and a weak base NH 4 OH ( K b = 1.8 × 10 –5 ). A one molar…
- Solubility product expression of salt MX 4 which is sparingly soluble with a solubility s can be given as
- Solubility product of radium sulphate is 4 × 10 –11 . What will be the solubility of Ra 2+ in 0.10 M Na 2 SO 4 ?
- p K a of a weak acid is 5.76 and p K b of a weak base is 5.25. What will be the pH of the salt formed by the two?
- Given below are the dissociation constant values of few acids. Arrange them in order of increasing acidic strength. H 2…
- The degree of ionisation of an acid H A is 0.00001 at 0.1 M concentration. Its dissociation constant will be
- Mark the appropriate choice to fill up the blanks in the given paragraph. A solution which maintains constant pH when…
- Which of the following is not true about a reversible reaction?
- In which of the following reactions the increase in pressure will favour the increase in products?
- If the value of equilibrium constant K c for the reaction, N 2 + 3H 2 2NH 3 is 7. The equilibrium constant for the…
- Which of the following is conjugate acid of SO 4 2– ?
- What will be the ionisation constant of formic acid if its 0.01 M solution is 14.5% ionised?
- When sulphur is heated at 900 K, S 8 is converted to S 2 . What will be the equilibrium constant for the reaction if…
- PCl 5 , PCl 3 and Cl 2 are at equilibrium at 500 K with concentration 2.1 M PCl 3 , 2.1 M Cl 2 and 1.9 M PCl 5 . The…
- Which of the following is not a general characteristic of equilibria involving physical processes?
- For a polybasic acid, the dissociation constants have a different values for each step, e.g ., H 3 A H + + H 2 A – , …
- For a reaction NH 4 COONH 2( s ) 2NH 3( g ) + CO 2( g ) , the equilibrium pressure is 3 atm. K p for the reaction will…
- What is the minimum concentration of SO 4 2– required to precipitate BaSO 4 in a solution containing 1 ×10 –4 mole of…
- In the system X + 2 Y Z , the equilibrium concentrations are, [ X ] = 0.06 mol L –1 , [ Y ] = 0.12 mol L –1 [ Z ] =…
- The solubility product of AgCl is 1.5625 × 10 –10 at 25°C. Its solubility in grams per litre will be
- In the following question, a statement of assertion is followed by a statement of reason. Mark the correct choice…
- 0.6 mole of PCl 5 , 0.3 mole of PCl 3 and 0.5 mole of Cl 2 are taken in a 1 L flask to obtain the following equilibrium…