Given below are two statements:
Statement (I) : A Buffer solution is the mixture of a salt and an acid or a base mixed in any particular quantities.
Statement (II) : Blood is naturally occurring buffer solution whose pH is maintained by $H_2CO_3/HCO_3^-$ concentrations.
In the light of the above statements, choose the correct answer from the options given below.
Statement (I) : A Buffer solution is the mixture of a salt and an acid or a base mixed in any particular quantities.
Statement (II) : Blood is naturally occurring buffer solution whose pH is maintained by $H_2CO_3/HCO_3^-$ concentrations.
In the light of the above statements, choose the correct answer from the options given below.
- Statement I is false but Statement II is true
- Both Statement I and Statement II is true
- Both Statement I and Statement II is false
- Statement I is true but Statement II is false
The Correct Option is A
Approach Solution - 1
Let's analyze the given statements and their validity concerning buffer solutions and physiological examples such as blood.
- Statement I: "A Buffer solution is the mixture of a salt and an acid or a base mixed in any particular quantities."
- This statement is false because a buffer solution is not just any mixture of a salt and an acid or base. It specifically consists of a weak acid and its conjugate base (or a weak base and its conjugate acid) in a suitable ratio. This combination helps maintain a stable pH upon the addition of small amounts of acid or base.
- Statement II: "Blood is naturally occurring buffer solution whose pH is maintained by \(H_2CO_3/HCO_3^-\) concentrations."
- This statement is true. Blood is indeed a natural buffer system primarily maintained by a carbonic acid (\(H_2CO_3\)) and bicarbonate (\(HCO_3^−\)) buffer system. This mechanism is efficient in regulating the pH of blood around 7.4, crucial for physiological processes.
In conclusion, the correct option is that Statement I is false but Statement II is true. This correctly identifies the nature of buffers and recognizes the specific biological example of blood as a buffering system.
Approach Solution -2
To analyze the given statements, we will first understand the concept of buffer solutions and their relevance in biological systems, such as blood.
Statement (I): "A Buffer solution is the mixture of a salt and an acid or a base mixed in any particular quantities."
- A buffer solution is a solution that resists changes in its pH when small quantities of an acid or a base are added. This is typically achieved by using a weak acid and its conjugate base or a weak base and its conjugate acid.
- A common misunderstanding is that any mixture of salt and an acid/base can form a buffer solution. In reality, specific ratios and components are necessary for a buffer to be effective. For example, a buffer system involving acetic acid (\(<\text{CH}_3\text{COOH}>\)) and sodium acetate (\(<\text{CH}_3\text{COONa}>\)) works because they form a conjugate acid-base pair.
- Hence, Statement I is false because it oversimplifies and inaccurately describes the conditions under which a buffer solution can be formed.
Statement (II): "Blood is a naturally occurring buffer solution whose pH is maintained by \(H_2CO_3/HCO_3^-\) concentrations."
- Blood maintains its pH primarily through the \( \text{H}_2\text{CO}_3/\text{HCO}_3^- \) buffer system. This system helps stabilize the pH around 7.4, which is critical for physiological processes.
- Carbonic acid (\( \text{H}_2\text{CO}_3 \)) and bicarbonate (\( \text{HCO}_3^- \)) act as a conjugate acid-base pair that can neutralize excess acids or bases introduced into the bloodstream.
- Therefore, Statement II is true as it correctly describes the biological buffer system in blood.
In conclusion, after analyzing both statements:
- Statement I is false as it incorrectly describes the requirements for a buffer solution.
- Statement II is true because it accurately explains the role of the \( \text{H}_2\text{CO}_3/\text{HCO}_3^- \) system in maintaining blood pH.
Correct Answer: Statement I is false but Statement II is true
Top JEE Main Chemistry Questions
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)- At equilibrium the concentrations of and in a sealed vessel at . What will be for the reaction
- Find out the major products from the following reactions
Cobalt chloride when dissolved in water forms pink colored complex $X$ which has octahedral geometry. This solution on treating with cone $HCl$ forms deep blue complex, $\underline{Y}$ which has a $\underline{Z}$ geometry $X, Y$ and $Z$, respectively, are
- The correct order of atomic radii is:
Top JEE Main Buffer Solutions Questions
- Only litre buffer solution was prepared by adding 0.10 mol each of $ NH_3 $ and $ NH_4Cl $ in deionised water. The change in pH on addition of 0.05 mol of HCl to the above solution is _____ $ \times 10^{-2} $, (Nearest integer) (Given : $ pK_b $ of $ NH_3 = 4.745 $ and $ \log_{10}3 = 0.477 $)
- Given below are two statements:
Statement I: The Henry’s law constant \( K_H \) is constant with respect to variations in solution concentration over the range for which the solution is ideally dilute.
Statement II: \( K_H \) does not differ for the same solute in different solvents.
In the light of the above statements, choose the correct answer from the options given below. Consider a solution of CO$_2$(g) dissolved in water in a closed container. Which one of the following plots correctly represents variation of $\log$ (partial pressure of CO$_2$ in vapour phase above water) [y-axis] with $\log$ (mole fraction of CO$_2$ in water) [x-axis] at
$25^\circ$C?
- At 298 K, the mole percentage of N$_2$(g) in air is 80%. Water is in equilibrium with air at a pressure of 10 atm. What is the mole fraction of N$_2$(g) in water at 298 K? ($K_H$ for N$_2$ = $6.5 \times 10^7$ mm Hg)
If the pKa of lactic acid is 5, then the pH of 0.005 M calcium lactate solution at \(25^\circ \text{C}\) is \(\_\_\_\_\_\_ \times 10^{-1}\) (Nearest integer).
Lactic Acid
Top JEE Main Questions
- Two masses $m$ and $\frac{m}{2}$ are connected at the two ends of a massless rigid rod of length $l$. The rod is suspended by a thin wire of torsional constant $k$ at the centre of mass of the rod-mass system(see figure). Because of torsional constant $k$, the restoring torque is $\tau =k\theta$ for angular displacement $\theta$. If the rod is rota ted by $\theta_0$ and released, the tension in it when it passes through its mean position will be:
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)- The value of is
- The number of terms of an is even. The sum of the odd terms is and of the even terms is . The last term exceeds the first by . Then the number of terms in the series is ______.
A black body is at a temperature of 2880 K. The energy of radiation emitted by this body with wavelength between 499 nm and 500 nm is U1, between 999 nm and 1000 nm is U2 and between 1499 nm and 1500 nm is U3. The Wien's constant, b = 2.88×106 nm-K. Then,