Question 2 : A solution which has {tex} 0.1 \mathrm { N } \ \mathrm { NH } _ { 4 } \mathrm { OH } {/tex} and {tex} 0.1 \mathrm { N }\ \mathrm { NH } _ { 4 } \mathrm { Cl } {/tex} has {tex} \mathrm { pH } = 9.25 . {/tex} The {tex} \mathrm { pK } _ { \mathrm { b } } {/tex} of {tex} \mathrm { NH } _ { 4 } \mathrm { OH } {/tex} is :-

Question 3 : Which equilibrium can be described as an acid-base reaction using the Lewis acid-base definition but not using the Bronsted-Lowry definition?

Question 5 : {tex} 28 \mathrm { g } \ \mathrm { N } _ { 2 } {/tex} and {tex} 6.0 \mathrm { g } {/tex} of {tex} \mathrm { H } _ { 2 } {/tex} are heated over catalyst in {tex} \mathrm { a } {/tex} closed one litre flask of {tex} 450 ^ { \circ } \mathrm { C } {/tex}. The entire equilibrium mixture required {tex} 500 \mathrm { mL } {/tex} of {tex} 1.0 \mathrm { M } {/tex} {tex} \mathrm { H } _ { 2 } \mathrm { SO } _ { 4 } {/tex} for neutralisation. The value of {tex} \mathrm { K } _ { \mathrm { c } } {/tex} for the reaction{tex} \mathrm { N } _ { 2 } ( \mathrm { g } ) + 3 \mathrm { H } _ { 2 } ( \mathrm { g } ) \rightleftharpoons 2 \mathrm { NH } _ { 3 } ( \mathrm { g } ) {/tex} is<br>

Question 8 : Which of the following statements are correct?<br>(i) Ionic product of water {tex} \left( \mathrm { K } _ { \mathrm { w } } \right) = \left[ \mathrm { H } ^ { + } \right] \left[ \mathrm { OH } ^ { - } \right] = 10 ^ { - 14 } \mathrm { M } ^ { 2 } {/tex} <br>(ii) At {tex}298 \mathrm { K }, \left[ \mathrm { H } ^ { + } \right] = \left[ \mathrm { OH } ^ { - } \right] = 10 ^ { - 7 } {/tex} <br>(iii) {tex} \mathrm { K } _ { \mathrm { w } } {/tex} does not depend upon temperature <br>(iv) Molarity of pure water {tex} = 55.55 \mathrm { M } {/tex}<br>

Question 9 : For the following three reactions a, b and c, equilibrium constants are given:<br>(i) {tex} \mathrm { CO } ( \mathrm { g } ) + \mathrm { H } _ { 2 } \mathrm { O } ( \mathrm { g } ) \rightleftharpoons \mathrm { CO } _ { 2 } ( \mathrm { g } ) + \mathrm { H } _ { 2 } ( \mathrm { g } ) ; \mathrm { K } _ { 1 } {/tex} <br>(ii) {tex} \mathrm { CH } _ { 4 } ( \mathrm { g } ) + \mathrm { H } _ { 2 } \mathrm { O } ( \mathrm { g } ) \rightleftharpoons \mathrm { CO } ( \mathrm { g } ) + 3 \mathrm { H } _ { 2 } ( \mathrm { g } ) ; \mathrm { K } _ { 2 } {/tex} <br>(iii) {tex} \mathrm { CH } _ { 4 } ( \mathrm { g } ) + 2 \mathrm { H } _ { 2 } \mathrm { O } ( \mathrm { g } ) \rightleftharpoons \mathrm { CO } _ { 2 } ( \mathrm { g } ) + 4 \mathrm { H } _ { 2 } ( \mathrm { g } ) ; \mathrm { K } _ { 3 } {/tex}<br>

Question 10 : If acetic acid is mixed with sodium acetate then <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7daf7c2a2ae2953d9494e"> ion concentration will

Question 11 : The dissociation of $CO_2$ can be expressed as $2CO_2\, \rightleftharpoons \, 2CO\, +\, O_2$. If the 2 moles of $CO_2$ is taken initially and 40% of the $CO_2$ is dissociated equilibrium then total number of moles at equilibrium is:

Question 12 : When heated, the compound decomposes as follows:<br/><br/><div>$N{ H }_{ 4 }COON{ H }_{ 2 }(s)\rightleftharpoons 2N{ H }_{ 3 }(g)+C{ O }_{ 2 }(g)$<br/><br/></div><div>at a certain temperature, the equilibrium pressure of the system is 0.318 atm. ${K}_{p}$ for the reaction is?</div>

Question 15 : A mixture of Nitrogen and Hydrogen is at an initial pressure of $200 atm$. If $20\%$ of the mixture reacts by the times equilibrium is reached, the equilibrium pressure of the mixture is:

Question 16 : The partial pressure of $PCl_5$, if equilibrium is reestablished at new equilibrium pressure 35 atm by changing volume is____________.<br/>

Question 17 : For the equilibrium,<br/>$LiCl\cdot { 3NH }_{ 3 }(s)\rightleftharpoons LiCl\cdot { NH }_{ 3 }(s)+2{ NH }_{ 3 }(g)\quad $ ${ K }_{ p }=9{ atm }^{ 2 }$ at ${ 37 }^{ o }C$.&#160;<div>A $5$ litre vessel contains $0.1$ mole of $LiCl\cdot { 3NH }_{ 3 }$. How many moles of ${ NH }_{ 3 }$ should be added to the flask at this temperature to derive the backward reaction for completion?<br/>$R=0.082 \ atm.L/molK$<br/></div>

Question 18 : $P{Cl}_{5}$ is dissociating $50$% at ${250}^{o} C$ at a total pressure of $P$ atm. If equilibrium constant is ${K}_{p}$, then which of the following relation is numerically correct?

Question 19 : The equilibrium constant for the reaction $CO(g)+H_{2}O(g)\rightleftharpoons CO_{2}(g)+H_{2}(g)$ is 3 at 500K. In a 2 litre vessel 60gm of water gas [equimolar mixture of CO(g) and $H_{2}(g)$] and 90 gm of steam is initially taken.&#160;<br/><div>What is the equilibrium concentration of $H_{2}(g) $ at equilibrium (mole/L)?</div>

Question 20 : For the reaction:<div><br/>$A(g)+B(g)\rightleftharpoons 2C(g)+D(g);{ K }_{ p }=0.05\ atm$ at $1000K$</div><div><br/>The value of ${K}_{c}$ is represented by:</div>