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NEET UG CHEMISTRY MCQ: Equilibrium

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Understanding +4 | -1

The thermal dissociation of calcium carbonate showing heterogeneous equilibrium is

{CaCO}_3({~s}) \rightleftharpoons {CaO}({s})+{CO}_2({~g})

For this reactions which of the following is/are true

(i)

{K}_{{c}}^{\prime}=\left[{CO}_2({~g})\right]

(ii)

{Kp}={pCO}_2

(iii)

\left[{CaCO}_3\right.

(s)] and

[{CaO}({s})]

are both constant

(iv)

\left[{CO}_2({~g})\right]

is constant

View answer and explanation

Correct option: B

(i), (ii) and (iii)

Option B ((i), (ii) and (iii)) is correct because for a heterogeneous equilibrium involving solids and gases, the equilibrium constant expressions only include the gaseous species, and the concentrations of solids are considered constant and incorporated into the equilibrium constant.

More Questions from Equilibrium

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Given below are two statements: One is labelled as Assertion A and the other labelled as Reason R.
Assertion A: During the boiling of water having temporary hardness,

Mg{(HC{O_3})_2}

is converted to

MgC{O_3}

.
Reason R The solubility product of

Mg{(OH)_2}

is greater than that of

MgC{O_3}

.
In the light of the above statements, choose the most appropriate answer from the options given below At a certain temperature,

K_{\mathrm{P}}

for the dissociation of solid

\mathrm{CaCO}_3

4.5 \times 10^{-2}

atm and for the reaction

\mathrm{C}(\mathrm{s})+\mathrm{CO}_2(\mathrm{g}) \rightleftharpoons 2 \mathrm{CO}(\mathrm{g}),

K_{\mathrm{P}}

2.0 \mathrm{~atm}.

The pressure of carbon monoxide at this temperature, when solid carbon

\mathrm{CaO}

\mathrm{CaCO}_3

are mixed together and allowed to attain equilibrium is Phenolphthalein shows … in acid medium. At the state of dynamic equilibrium, for solute

+

\leftrightharpoons

\mathrm{PC}{\mathrm{l}_5}\leftrightharpoons\mathrm{PC}{\mathrm{l}_3} + \mathrm{C}{\mathrm{l}_2}

, initial concentration of each reactant and product is 1 M. If

{K_{\mathrm{eq}}} = 0.41

then Select the

\mathrm{p}{K_a}

value of the strongest acid from the following