pOH of H2O is 7.0 at 298K. If water is heated at 350K, which of the following statement should be true ?

(1) pOH will decrease

(2) pOH will increase

(3) pOH will remain 7.0

(4) Concentration of H+ ions will increase but that of OH- will decrease.

Subtopic:  pH calculation |
 57%
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In which case following equilibrium can't be established:

CaCO3(s) CaO(s) + CO2(g)

1. Some CaO & pressure of CO2 was greater than Kp

2. Pure CaCO3

3. Some CaCO3 & pressure of CO2 gas greater than Kp

4. Some CaCO3 & pressure of CO2 gas less than Kp.

Subtopic:  Kp, Kc & Factors Affecting them |
From NCERT
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An aqueous solution of NaHSO3 is-

1. Acidic                 
2. Slightly alkaline
3. Alkaline             
4. Slightly Acidic

Subtopic:  Acids & Bases - Definitions & Classification |
From NCERT
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The solubility product constant (Ksp) of salts of types MX, MX2 and M3X at temperature T are 4.0 X 10-8, 3.2 X 10-14 and 2.7 X 10-15 respectively. Solubilities(mol dm-3) of the salts at temperature T are the order:

1. MX > MX> M3X

2. M3X > MX2 > MX

3. MX> M3X > MX

4. M3X >MX > MX2

Subtopic:  Solubility Product |
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Ostwald dilution law for weak electrolyte HA can be given as

(1) Ka=2(1-α)
(2) Ka = 2 if α0
(3) Ka = 2λ2(λ2-λ)
(4) All of the above

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 73%
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In the reaction, N2O4  2NO2α is that part of N2O4 which dissociates. The number of moles at equilibrium will be:

1. 1-α2

2. 3α

3. α

4. 1+α

Subtopic:  Introduction To Equilibrium |
 77%
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In which solution, AgCl has minimum solubility ?

1. 0.05 M AgNO3

2. 0.01 M NaCl

3. Pure Water

4. 0.01 M NH4OH

Subtopic:  Solubility Product |
 53%
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50 ml of HCl (pH=1) is mixed with another 100 ml of HCl (pH=2) then pH of resulting solution will be approximately

1. 1.2

2. 1.4

3. 1.6

4. 1.8

Subtopic:  pH calculation |
 73%
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In a nitrating mixture (HNO3 + H2SO4), HNO3 acts as

1. Acid

2. Base

3. Acid as well as Base

4. Neither acid nor base

Subtopic:  Acids & Bases - Definitions & Classification |
 65%
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When a solution of acetic acid was titrated with NaOH, the pH of the solution when half of the acid, neutralised was 4.2. Dissociation constant of the acid is

1. 6.31 × 10-5

2. 3.2 × 10-5

3. 8.7 × 10-8

4. 6.42 × 10-4

Subtopic:  pH calculation |
 52%
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