Eamcet - Chemistry - Equilibrium

The pH of a solution of H2O2 is 6.0, Some chlorine gas is bubbled into this solution. Which of the following is correct

A.  The pH of resultant solution becomes 8.0

B.  Hydrogen gas is liberated from resultant solution

C.  The pH of resultant solution becomes less than 6.0 and oxygen gas is liberated

D.  Cl2O is formed in the resultant solution

View Answer  

Correct Answer :

The pH of resultant solution becomes less than 6.0 and oxygen gas is liberated



Explanation :
No Explanation available for this question

Study the following table: Buffer solution Volume(in ml) of 0.M weak Volume(in ml) of 0.1 M sodium salt of weak acid I 4.0 4.0 II 4.0 40.0 III 40.0 4.0 IV 0.1 10.0 Which of the two sets of buffer solutions have least pH?

A.  I and II

B.  I and III

C.  II and III

D.  II and IV

View Answer  

Correct Answer :

I and III



Explanation :
No Explanation available for this question

Assertion (A): The PH of a buffer solution containing equal moles of acetic acid and sodium acetate is 4.8  (pKa of acetic acid is 4.8)Reason (R): The ionic product of water at  250C is l0-14 mol2 .L-2. The correct answer is

A.  Both (A) and (R) are true and (R) is the correct explanation of (A)

B.  Both (A) and (R) are true and (R) is not the correct explanation of A

C.  (A) is true but (R) is not true

D.  (A) is not  true but (R) is  true

View Answer  

Correct Answer :

Both (A) and (R) are true and (R) is not the correct explanation of A



Explanation :
No Explanation available for this question

When 9.65 Coulombs of electricity is passed through a solution of AgN03 (atomic weight of silver 108), the amount of silver deposited is

A.  10.8mg

B.  5.4mg

C.  16.2mg

D.  21.2mg

View Answer  

Correct Answer :

10.8mg



Explanation :
No Explanation available for this question

If in a 100 mL of an aqueous HC1 of pH 1.00, 900 mL of more distilled water is added, the pH of the resultant solution will be :

A.  1.0

B.  2.0

C.  4.0

D.  7.0

View Answer  

Correct Answer :

2.0



Explanation :
No Explanation available for this question

The degree of dissociation of an acid HA in 0.1 M solution is 0.1%. Its dissociation constant is ;

A.  1 xl0-3

B.  lx10-7

C.  1 x10-10

D.  lx10-14

View Answer  

Correct Answer :

lx10<sup>-7</sup>



Explanation :
No Explanation available for this question

Which of the following is not a conjugate acid-base pair

A.  HPO32-  , PO33-

B.  H2PO-4     ,HPO42-

C.  H2PO-4  , H3PO4

D.  H2PO-4 , PO33-

View Answer  

Correct Answer :

H<sub>2</sub>PO<sup>-</sup>4 , PO<sub>3</sub><sup>3-</sup>



Explanation :
No Explanation available for this question

Which one of the following salts give an acidic solution in water

A.  CH3COONa

B.  NH4Cl

C.  NaCl

D.  CH3COONH4

View Answer  

Correct Answer :

NH<sub>4</sub>Cl



Explanation :
No Explanation available for this question

The equilibrium constant for the reactionSO2(g) + (1/2) O2(g) <====> SO3(g) is  5 x 10-2 atm  The equilibrium constant of the reaction2SO3(g)  <====> 2SO2(g) + O2(g) would be

A.  100 atm

B.  200 atm

C.  4 x 102  atm

D.  6.25x 104  atm

View Answer  

Correct Answer :

4 x 10<sup>2</sup>&nbsp; atm



Explanation :
No Explanation available for this question

The concentration of oxalic acid is 'x'mol L-1. 40 mL of this solution reacts with 16 mL of 0.05 M acidified KMn04. What is the pH  of 'x' M oxalic acid solution ? (Assume that oxalic acid dissociates completely)

A.  1.3

B.  1.699

C.  1

D.  2

View Answer  

Correct Answer :

1.3



Explanation :
No Explanation available for this question

pH of a buffer solution decreases by 0.02 units when 0.12 g of acetic acid is added to 250 ml of a buffer solution of acetic acid and Potassium acetate at 270C. The buffer capacity of the solution is

A.  0.1

B.  10

C.  1

D.  0.4

View Answer  

Correct Answer :

0.4



Explanation :
No Explanation available for this question

The equilibrium constants for the reactions N2(g)+O2(g)⇔2NO(g) and NO(g)+1/2 O2(g) are K1 and K2 respectively .Then the equilibrium constant for the reaction N2(g)+O2(g)⇔2NO2(g) is

A.  K1/K2

B.  K12-K22

C.  K1 x K22

D.  K1 - K22

View Answer  

Correct Answer :

K1 x K22



Explanation :
No Explanation available for this question

The conjugate acid of NH2- ion is:

A.  NH3

B.  NH4+

C.  N2H4

D.  NH3OH

View Answer  

Correct Answer :

NH<sub>3</sub>



Explanation :
No Explanation available for this question

The solubility of LiOH in a solution of pH = 8 = is Ksp = 1.8 x 10-12

A.  1.8 x 10-18

B.  1.8 x 10-6

C.  1.3 x 10-5

D.  1.8 x 10-4

View Answer  

Correct Answer :

1.8 x 10-6



Explanation :
No Explanation available for this question

Assertion(A): A catalyst has no effect on the state of equilibrium Reason:A catalyst influences the rates of both forward and backward reactions to the same extent

A.  Both A and R are true and R is not correct explanation of A

B.  Both A and R are true and R is not correct explanation of A

C.  A is true R is false

D.  R is true A is false

View Answer  

Correct Answer :

Both A and R are true and R is not correct explanation of A



Explanation :
No Explanation available for this question

The order of pH of 0.200 M solutions of NH4NO3, NaNO3 and Na2CO3 is

A.  NH4NO3 < Na2CO3 < NaNO3  

B.  NH4NO3 <  NaNO3 < Na2CO3

C.  Na2CO3 <  NaNO3 < NH4NO3

D.  NaNO3 < NH4NO3 < Na2CO3

View Answer  

Correct Answer :

NH<sub>4</sub>NO<sub>3</sub> &lt;&nbsp; NaNO<sub>3</sub> &lt; Na<sub>2</sub>CO<sub>3</sub><sub></sub>



Explanation :
No Explanation available for this question

Meta-phosphoric acid is represented by

A.  H3PO3

B.  H2PO3

C.  HPO3

D.  H4P2O7

View Answer  

Correct Answer :

H3PO3



Explanation :
No Explanation available for this question

Which one of the following statements is correct

A.  Bronsted - Lowry theory could not explain the acidic nature of BCl3

B.  The pH of 0.01 M NaOH solution is 2

C.  The ionic product of water at 250C is 10-10 mol2, L-2

D.  The pH of a solution can be calculated using the equation pH = log [H+]

View Answer  

Correct Answer :

Bronsted - Lowry theory could not explain the acidic nature of BCl<sub>3</sub>



Explanation :
No Explanation available for this question

75 ml of 0.2 M HCl is mixed with 25 ml of 1 M HCl. To this solution, 300 ml of distilled water is added. What is the pH of the resultant solution

A.  1

B.  2

C.  4

D.  0.2

View Answer  

Correct Answer :

1



Explanation :
No Explanation available for this question