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Medical
92 Views   |   5 months, 3 weeks ago

If the value of an equilibrium constant for a particular reaction is 1.6 x 1012, then at equilibrium the system will contain:

  • Option 1)

    mostly products.

  • Option 2)

    similar amounts of reactants and products.

  • Option 3)

    all reactants.

  • Option 4)

    mostly reactants.

 

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A Ashutosh
Answered 4 months ago
1  
Medical
123 Views   |   6 months, 2 weeks ago

Which one of the following conditions will favour maximum formation of the product in the reaction,

A_{2}(g) + B_{2}(g) \rightleftharpoons X_{2}(g) \Delta _{r}H = -X kJ ?

 

  • Option 1)

    High temperature and high pressure

  • Option 2)

    Low temperature and low pressure

  • Option 3)

    Low temperature and high pressure

  • Option 4)

    High temperature and low pressure

 

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S subam
Answered 6 months, 2 weeks ago
As we learnt that Effect of Pressure change - A pressure change obtained by changing the volume can affect the yield of product in case of a gaseous reaction where the total number of moles of gaseous reactant and total number of moles of gaseous product are different. -     Effect of temperature change - When a change in temperature occur, the value of equilibrium constant Kc is...
Medical
1983 Views   |   6 months, 2 weeks ago

The solubility of BaSO4 in water is 2.42 x 10-3 gL-1 at 298 K. The value of its solubility product (Ksp) will be
(Given molar mass of BaSO4 = 233 g mo1-1)

 

  • Option 1)

    1.08 x 10-14 mol2 L-2

  • Option 2)

    1.08 x 10-12 mol2 L-2

  • Option 3)

    1.08 x 10-10 mol2 L-2

  • Option 4)

    1.08 x 10-8 mol2 L-2

 

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A aadil.khan
Answered 6 months, 2 weeks ago
As we learnt that General expression of solubility product - - wherein Its solubility product is          Option 1) 1.08 x 10-14 mol2 L-2 This is incorrect. Option 2) 1.08 x 10-12 mol2 L-2 This is incorrect. Option 3) 1.08 x 10-10 mol2 L-2 This is correct. Option 4) 1.08 x 10-8 mol2 L-2 This is incorrect.
Medical
1077 Views   |   6 months, 2 weeks ago

Following solutions were prepared by mixing different volumes of NaOH and HCI of different concentrations :
a.    60 mL —M/10 HC1 + 40 mL —M/10 NaOH
b.    55 mL M/10 HCl + 45 mL M/10 NaOH
c.    75 mL M/5 HCl + 25 mL M/5 NaOH
d.    100 mI—M/10 HCl + 100 mL —M/10 NaOH

pH of which one of them will be equal to 1 ?

 

  • Option 1)

    d

  • Option 2)

    a

  • Option 3)

    b

  • Option 4)

    c

 

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V vakul.arora
Answered 6 months, 2 weeks ago
As we learnt that The p(H) scale - Hydronium ion concentration in molarity is more conveniently expressed on a logarithmic scale known as p(H) scale. - wherein The p(H) of a solution is defined as negative logarithm to base 10 of the activity of hydrogen ion    As N1V1 > N2V2 so acid left at the end of reaction     Option 1) d This is incorrect. Option 2) a This is incorrect. Option...
Medical
85 Views   |   7 months, 1 week ago

In a buffer solution containing equal concentration of B^{-} and HB, the k_b \ for \ B^{-} is 10^{-10} . The pH of buffer soluction is:

  • Option 1)

    10

  • Option 2)

    7

  • Option 3)

    6

  • Option 4)

    4

 

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A aadil.khan
Answered 7 months, 1 week ago
As learnt in Value of Kb - - wherein     Option 1) 10 This option is incorrect Option 2) 7 This option is incorrect Option 3) 6 This option is incorrect Option 4) 4 This option is correct
Medical
109 Views   |   7 months, 1 week ago

In qualitative analysis, the metals of Group I can be separated from other ions by precipitating them as chloride salts. A solution initially contains Ag^{+} and Pb^{2+} at a  concentration of 0.10M. Aqueous HCl is added to this solution until the Cl^{-} concentration is 0.10M. What will the concentration of Ag^{+} and Pb^{2+} be at equilibrium?

\left ( K_{sp}\ for AgCl=1.8\times 10^{-10},\ K_{sp}\ for PbCl_{2}=1.7\times 10^{-5} \right )

  • Option 1)

    [Ag^{+}]=1.8\times 10^{-7} M; [Pb^{2+}]=1.7\times 10^{-6}M

  • Option 2)

    [Ag^{+}]=1.8\times 10^{-11} M; [Pb^{2+}]=8.5\times 10^{-5}M

  • Option 3)

    [Ag^{+}]=1.8\times 10^{-9} M; [Pb^{2+}]=1.7\times 10^{-3}M

  • Option 4)

    [Ag^{+}]=1.8\times 10^{-11} M; [Pb^{2+}]=8.5\times 10^{-4}M

 

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D Divya Saini
Answered 7 months, 1 week ago
As learnt in General expression of solubility product - - wherein Its solubility product is        Option 1) This option is incorrect Option 2) This option is incorrect Option 3) This option is correct Option 4) This option is incorrect
Medical
113 Views   |   7 months, 1 week ago

If pH of a saturated solution of Ba\left ( OH \right )_2  is 12, the value of its K_{\left ( sp \right )} is

  • Option 1)

    4.00\times 10^{-6}M^{3}

  • Option 2)

    4.00\times 10^{-7}M^{3}

  • Option 3)

    5.00\times 10^{-6}M^{3}

  • Option 4)

    5.00\times 10^{-7}M^{3}

 

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A aadil.khan
Answered 7 months, 1 week ago
As learnt in General expression of solubility product - - wherein Its solubility product is       We know that,                                  S                 2S                  Option 1) This option is incorrect Option 2) This option is incorrect Option 3) This option is incorrect Option 4) This option is correct
Medical
99 Views   |   7 months, 1 week ago

Which one of the following pairs of solution is not an acidic buffer?

  • Option 1)

    HClO_{4}\ and\ NaClO_{4}

  • Option 2)

    CH_3COOH\ and\ CH_3COONa

  • Option 3)

    H_2CO_3\ and\ Na_2CO_3

  • Option 4)

    H_3PO_4\ and\ Na_3PO_4

 

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V vakul.arora
Answered 7 months, 1 week ago
  Law of Chemical equilibrium - At a given temperature, the product of concentration of the reaction products raised to the respective stoichiometric coefficient in the balanced chemical equation divided by the product of concentration of the reactants raised to their individual stoichiometric coefficients has a constant value. - wherein are equilibrium concentration    Acidic Buffer is a...
Medical
100 Views   |   7 months, 1 week ago

The K_{sp} \ of \ Ag_{2}CrO_{4}, Agcl, AgBr\ and\ AgI are respectively, 1.1\times 10^{-12}, 1.8\times 10^{-10}, 5.0\times 10^{-13}, 8.3\times 10^{-17}. Which one of the following salts will precipitate last if AgNO_{3} solution is added to the solution containing equal moles of NaCl, NaBr, Nal, and Na_{2}CrO_{4}?

  • Option 1)

    AgCl

  • Option 2)

    AgBr

  • Option 3)

    Ag_{2}CrO_{4}

  • Option 4)

    AgI

 

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V vakul.arora
Answered 7 months, 1 week ago
  General expression of solubility product - - wherein Its solubility product is        AgCrO4     1.1X10-12= 4 S3           1.8X10-10= S2               AgBr     5X1013 = S2                  AgI        8.3 X10-17 =  S2            Thus Ag2Cr04  will be precipitated last. Option 1) AgCl incorrect Option 2) AgBr incorrect Option 3) correct Option 4) AgI incorrect
Medical
100 Views   |   7 months, 1 week ago

The K_{sp} \ of \ Ag_{2}CrO_{4}, Agcl, AgBr\ and\ AgI are respectively, 1.1\times 10^{-12}, 1.8\times 10^{-10}, 5.0\times 10^{-13}, 8.3\times 10^{-17}. Which one of the following salts will precipitate last if AgNO_{3} solution is added to the solution containing equal moles of NaCl, NaBr, Nal, and Na_{2}CrO_{4}?

  • Option 1)

    AgCl

  • Option 2)

    AgBr

  • Option 3)

    Ag_{2}CrO_{4}

  • Option 4)

    AgI

 

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V vakul.arora
Answered 7 months, 1 week ago
  General expression of solubility product - - wherein Its solubility product is        AgCrO4     1.1X10-12= 4 S3           1.8X10-10= S2               AgBr     5X1013 = S2                  AgI        8.3 X10-17 =  S2            Thus Ag2Cr04  will be precipitated last. Option 1) AgCl incorrect Option 2) AgBr incorrect Option 3) correct Option 4) AgI incorrect
Medical
93 Views   |   7 months, 1 week ago

Consider the nitration of bezene using mixed conc of H_{2}SO_{4} and HNO_{3}. If a large amount of KHSO_{4} is added to the mixture, tne rate of nitration will be

  • Option 1)

    faster

  • Option 2)

    slower

  • Option 3)

    unchanged

  • Option 4)

    doubled

 

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P Plabita
Answered 7 months, 1 week ago
  Effect of concentration change on equilibrium - When the concentration of any of the reactants or products in a reaction at equilibrium is changed, the composition of the equilibrium mixture changes so as to minimize the effect of concentration change. If we add reactant, the equilibrium shift towards right. -   In the nitration of benzene in the presence of conc. H2SO4 and HNO3, benzene is...
Medical
136 Views   |   7 months, 1 week ago

MY and NY_3, two  nearly insoluble salts, have the same K_{sp} value of 6.2\times 10^{-13} at room temperature. Which statement would be true in regard to MY and NY_3?

  • Option 1)

    The molar solubilities of MY and NY_3 in water are identical.

  • Option 2)

    The molar solubility of MY in water is less than that of NY_3

  • Option 3)

    The salts MY and NY_3 are more soluble in 0.5M KY than in pure water

  • Option 4)

    The addition of the salt of KY to solution of MY and NY_3 will have no effect on their solubilities

 

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A aadil.khan
Answered 7 months, 1 week ago
  General expression of solubility product - - wherein Its solubility product is       For MY Ksp= Option 1) The molar solubilities of MY and in water are identical. incorrect Option 2) The molar solubility of MY in water is less than that of correct Option 3) The salts MY and are more soluble in 0.5M KY than in pure water incorrect Option 4) The addition of the salt of KY to...
Medical
109 Views   |   7 months, 1 week ago

What is the pH of the resulting solution when equal  volumes of 0.1 M NaOH and 0.01 M HCl are mixed?

  • Option 1)

    12.65

  • Option 2)

    2.0

  • Option 3)

    7.0

  • Option 4)

    1.04

 

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P prateek
Answered 7 months, 1 week ago
  Relation between Ka and Kb -     - wherein    .01 mole of NaOH will be completely neutralised by .01 mole of HCl. Hence remaining part of NaOH is .09 mole. as equal volume is mixed [OH-]=.04514 P(H) = 14- P(OH) = 14-log [OH-] =12.65   Option 1) 12.65 correct Option 2) 2.0 incorrect Option 3) 7.0 incorrect Option 4) 1.04 incorrect
Medical
88 Views   |   7 months, 1 week ago

Which of the following statements is correct for a reversible process in a state of equilibrium?

  • Option 1)

    \Delta G=2.30\ RT\ log \ K

  • Option 2)

    \Delta G^{o}=-2.30\ RT\ log \ K

  • Option 3)

    \Delta G^{o}=2.30\ RT\ log \ K

  • Option 4)

    \Delta G=-2.30\ RT\ log \ K

 

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D Divya Saini
Answered 7 months, 1 week ago
As we discussed in concept Relation between Gibbs energy and reaction Quotient -     - wherein is standard Gibbs energy.       Option 1) This option is incorrect. Option 2) This option is correct. Option 3) This option is incorrect. Option 4) This option is incorrect.
Medical
88 Views   |   7 months, 1 week ago

The reaction 2A_{\left ( g \right )}+B_{\left ( g \right )}\rightleftharpoons 3C_{\left ( g \right )}+D_{\left ( g \right )} is begun with the concentrations of A and B both at an initial value of 1.00M. When equilibrium is reached, the concentrations of D is measured and found to be 0.25M. The value for the equilibrium constant for this reaction is given by the expression

  • Option 1)

    [\left ( 0.75 \right )^{3}\left ( 0.25 \right )]\div [\left ( 0.75 \right )^{2}\left ( 0.25 \right )]

  • Option 2)

    [\left ( 0.75 \right )^{3}\left ( 0.25 \right )]\div [\left ( 1.00 \right )^{2}\left ( 1.00 \right )]

  • Option 3)

    [\left ( 0.75 \right )^{3}\left ( 0.25 \right )]\div [\left ( 0.50 \right )^{2}\left ( 0.75 \right )]

  • Option 4)

    [\left ( 0.75 \right )^{3}\left ( 0.25 \right )]\div [\left ( 0.50 \right )^{2}\left ( 0.25 \right )]

 

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D Divya Saini
Answered 7 months, 1 week ago
As we discussed in concept Law of Chemical equilibrium - At a given temperature, the product of concentration of the reaction products raised to the respective stoichiometric coefficient in the balanced chemical equation divided by the product of concentration of the reactants raised to their individual stoichiometric coefficients has a constant value. - wherein are equilibrium...
Medical
84 Views   |   7 months, 1 week ago

In which  of the following equilibrium K_{c} and K_{p} are not equal?

  • Option 1)

    2NO_{\left ( g \right )}\rightleftharpoons N_{2\left ( g \right )}+O_{2\left ( g \right )}

  • Option 2)

    SO_{2\left ( g \right )}+NO_{2\left ( G \right )}\rightleftharpoons SO_{3\left ( g \right )}+NO_{\left ( g \right )}

  • Option 3)

    H_{2\left ( g \right )}+I_{2\left ( g \right )}\rightleftharpoons 2HI_{\left ( g \right )}

  • Option 4)

    2C_{\left ( s \right )}+O_{2\left ( g \right )}\rightleftharpoons 2CO_{2\left ( g \right )}

 

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A aadil.khan
Answered 7 months, 1 week ago
As we discussed in concept Relation between Kp and Kc - while calculating the value of Kp , pressure should be expressed in bar. - wherein  = (number of moles of gaseous products) - (number of moles gaseous reaction)     In 1), 2) and 3) In 4)   Option 1) This option is incorrect. Option 2) This option is incorrect. Option 3) This option is incorrect. Option 4) This option is correct.
Medical
95 Views   |   7 months, 1 week ago

For the reaction N_{2}\left ( g \right )+O_{2}\left ( g \right )\rightleftharpoons 2NO\left ( g \right ), the equilibrium constant is K_{1}. The equilibrium constant is K_{2} for the reaction

2NO\left ( g \right )+O_{2}\rightleftharpoons 2NO_{2}\left ( g \right )

What is K for the reaction

NO_{2}(g)\rightleftharpoons \frac{1}{2}N_{2}(g)+O_{2}(g)?

  • Option 1)

    1/\left ( 2K_{1}K_{2} \right )

  • Option 2)

    1/\left ( 4K_{1}K_{2} \right )

  • Option 3)

    [1/K_{1}K_{2}]^{\frac{1}{2}}

  • Option 4)

    1/\left ( K_1 K_2 \right )

 

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P Plabita
Answered 7 months, 1 week ago
As we discussed in concept Law of Chemical equilibrium - At a given temperature, the product of concentration of the reaction products raised to the respective stoichiometric coefficient in the balanced chemical equation divided by the product of concentration of the reactants raised to their individual stoichiometric coefficients has a constant value. - wherein are equilibrium...
Medical
89 Views   |   7 months, 1 week ago

If the value of an equilibrium constant for a particular reaction is 1.6\times10^{12} then at equilibrium the system will contain 

  • Option 1)

    mostly reactants 

  • Option 2)

    mostly products 

  • Option 3)

    similar amounts of reactants and products 

  • Option 4)

    all reactants 

 

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V vakul.arora
Answered 7 months, 1 week ago
As we learnt in concept Composition of equilibrium mixture when Kc > 1000 - If Kc > 103,  products predominate over reactants i.e. if Kc is very large, the reaction proceeds nearly to completion. - wherein e.g.           The valve of K is very high means reaction proceeds almost to completion i.e. the system will contain mostly products. Option 1) mostly reactants  This option is...
Medical
360 Views   |   8 months, 2 weeks ago

Which of the following salts will give highest pH in water?

  • Option 1)

    KCl

  • Option 2)

    NaCl

  • Option 3)

    Na2CO3

  • Option 4)

    CuSO4

 

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S Sabhrant Ambastha
Answered 8 months, 1 week ago
Among all the species given, Na2Co3 is a salt of weak acid and strong base which upon hydrolysis will give a solution with highest ph. Option 1) KCl this is the incorrect option Option 2) NaCl this is the incorrect option Option 3) Na2CO3 this is the correct option Option 4) CuSO4 this is the incorrect option
Medical
3748 Views   |   8 months, 2 weeks ago

The percentage of pyridine (C5H5N) that forms pyridinium ion (C5H5N*H) in a 0.10 M aqueous pyridine solution (Kb for C5H5N = 1.7 x 10-9) is

  • Option 1)

    0.0060%

  • Option 2)

    0.013%

  • Option 3)

    0.77%

  • Option 4)

    1.6%

 

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P prateek
Answered 8 months, 1 week ago
  Relation between Ka and Kb -     - wherein                                                                                                     % of pyridie        Ulnser  is 3 Chanage eusur  to 3 Option 1) 0.0060% Incorrect Option 2) 0.013% Correct Option 3) 0.77% Incorrect Option 4) 1.6% Incorrect
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