277451
18 gram glucose (Molar mass $=180$ ) is dissolved in $100 \mathrm{~mL}$ of water at $300 \mathrm{~K}$. If $R=$ $0.0821 \mathrm{~L}$-atm $\mathrm{mol}^{-1} \mathrm{~K}^{-1}$ what is the osmotic pressure of solution?
1 $2.463 \mathrm{~atm}$
2 $24.63 \mathrm{~atm}$
3 $8.21 \mathrm{~atm}$
4 $0.821 \mathrm{~atm}$
Explanation:
Given, $\mathrm{m}=18 \mathrm{~g}$ $\mathrm{V}=100 \mathrm{ml}$ water $=0.1 \mathrm{~L}$ water $\mathrm{T}=300 \mathrm{~K}$ $\mathrm{R}=0.083 \mathrm{~L}$ bar mol $^{-1} \mathrm{~K}^{-1}$ $\Pi=$ ? Where $\Pi=$ osmotic pressure We know that, $\begin{aligned} & \Pi=\frac{w \mathrm{RT}}{\mathrm{MV}} \\ & =\frac{18 \times 0.0821 \times 300}{180 \times 0.1} \\ & =24.63 \mathrm{~atm} \end{aligned}$
MHT CET-03.05.2019
SOLUTIONS
277452
Assertion: Reverse osmosis is used for desalination of sea water. Reason: Reverse osmosis occurs when a pressure larger than the osmotic pressure is applied to the solution.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
The salt solution is subjected to pressure and pressure against the semi-permeable membrane. The applied pressure is greater than the osmotic pressure. When exerted pressure is greater than osmotic pressure $\mathrm{H}_{2} \mathrm{O}$ molecules go from lower concentration of $\mathrm{H}_{2} \mathrm{O}$ to higher concentration of water through semi-permeable membrane and this process is known as reverse osmosis. Hence, question is correct reason is correct explanation of assertion.
AIIMS 25 May 2019 (Evening)
SOLUTIONS
277453
pH of a $0.1 \mathrm{M}$ monobasic acid is found to be 2 . Hence, its osmotic pressure at a given temperature $T$ is
277454
If osmotic pressure of $4 \%(\mathrm{w} / \mathrm{v})$ solution of sucrose is same as $2 \%(\mathrm{w} / \mathrm{v})$ solution of ' $\mathrm{X}$ ', then the molecular mass of $X(\mathrm{~g} / \mathrm{mol})$ is
277451
18 gram glucose (Molar mass $=180$ ) is dissolved in $100 \mathrm{~mL}$ of water at $300 \mathrm{~K}$. If $R=$ $0.0821 \mathrm{~L}$-atm $\mathrm{mol}^{-1} \mathrm{~K}^{-1}$ what is the osmotic pressure of solution?
1 $2.463 \mathrm{~atm}$
2 $24.63 \mathrm{~atm}$
3 $8.21 \mathrm{~atm}$
4 $0.821 \mathrm{~atm}$
Explanation:
Given, $\mathrm{m}=18 \mathrm{~g}$ $\mathrm{V}=100 \mathrm{ml}$ water $=0.1 \mathrm{~L}$ water $\mathrm{T}=300 \mathrm{~K}$ $\mathrm{R}=0.083 \mathrm{~L}$ bar mol $^{-1} \mathrm{~K}^{-1}$ $\Pi=$ ? Where $\Pi=$ osmotic pressure We know that, $\begin{aligned} & \Pi=\frac{w \mathrm{RT}}{\mathrm{MV}} \\ & =\frac{18 \times 0.0821 \times 300}{180 \times 0.1} \\ & =24.63 \mathrm{~atm} \end{aligned}$
MHT CET-03.05.2019
SOLUTIONS
277452
Assertion: Reverse osmosis is used for desalination of sea water. Reason: Reverse osmosis occurs when a pressure larger than the osmotic pressure is applied to the solution.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
The salt solution is subjected to pressure and pressure against the semi-permeable membrane. The applied pressure is greater than the osmotic pressure. When exerted pressure is greater than osmotic pressure $\mathrm{H}_{2} \mathrm{O}$ molecules go from lower concentration of $\mathrm{H}_{2} \mathrm{O}$ to higher concentration of water through semi-permeable membrane and this process is known as reverse osmosis. Hence, question is correct reason is correct explanation of assertion.
AIIMS 25 May 2019 (Evening)
SOLUTIONS
277453
pH of a $0.1 \mathrm{M}$ monobasic acid is found to be 2 . Hence, its osmotic pressure at a given temperature $T$ is
277454
If osmotic pressure of $4 \%(\mathrm{w} / \mathrm{v})$ solution of sucrose is same as $2 \%(\mathrm{w} / \mathrm{v})$ solution of ' $\mathrm{X}$ ', then the molecular mass of $X(\mathrm{~g} / \mathrm{mol})$ is
277451
18 gram glucose (Molar mass $=180$ ) is dissolved in $100 \mathrm{~mL}$ of water at $300 \mathrm{~K}$. If $R=$ $0.0821 \mathrm{~L}$-atm $\mathrm{mol}^{-1} \mathrm{~K}^{-1}$ what is the osmotic pressure of solution?
1 $2.463 \mathrm{~atm}$
2 $24.63 \mathrm{~atm}$
3 $8.21 \mathrm{~atm}$
4 $0.821 \mathrm{~atm}$
Explanation:
Given, $\mathrm{m}=18 \mathrm{~g}$ $\mathrm{V}=100 \mathrm{ml}$ water $=0.1 \mathrm{~L}$ water $\mathrm{T}=300 \mathrm{~K}$ $\mathrm{R}=0.083 \mathrm{~L}$ bar mol $^{-1} \mathrm{~K}^{-1}$ $\Pi=$ ? Where $\Pi=$ osmotic pressure We know that, $\begin{aligned} & \Pi=\frac{w \mathrm{RT}}{\mathrm{MV}} \\ & =\frac{18 \times 0.0821 \times 300}{180 \times 0.1} \\ & =24.63 \mathrm{~atm} \end{aligned}$
MHT CET-03.05.2019
SOLUTIONS
277452
Assertion: Reverse osmosis is used for desalination of sea water. Reason: Reverse osmosis occurs when a pressure larger than the osmotic pressure is applied to the solution.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
The salt solution is subjected to pressure and pressure against the semi-permeable membrane. The applied pressure is greater than the osmotic pressure. When exerted pressure is greater than osmotic pressure $\mathrm{H}_{2} \mathrm{O}$ molecules go from lower concentration of $\mathrm{H}_{2} \mathrm{O}$ to higher concentration of water through semi-permeable membrane and this process is known as reverse osmosis. Hence, question is correct reason is correct explanation of assertion.
AIIMS 25 May 2019 (Evening)
SOLUTIONS
277453
pH of a $0.1 \mathrm{M}$ monobasic acid is found to be 2 . Hence, its osmotic pressure at a given temperature $T$ is
277454
If osmotic pressure of $4 \%(\mathrm{w} / \mathrm{v})$ solution of sucrose is same as $2 \%(\mathrm{w} / \mathrm{v})$ solution of ' $\mathrm{X}$ ', then the molecular mass of $X(\mathrm{~g} / \mathrm{mol})$ is
277451
18 gram glucose (Molar mass $=180$ ) is dissolved in $100 \mathrm{~mL}$ of water at $300 \mathrm{~K}$. If $R=$ $0.0821 \mathrm{~L}$-atm $\mathrm{mol}^{-1} \mathrm{~K}^{-1}$ what is the osmotic pressure of solution?
1 $2.463 \mathrm{~atm}$
2 $24.63 \mathrm{~atm}$
3 $8.21 \mathrm{~atm}$
4 $0.821 \mathrm{~atm}$
Explanation:
Given, $\mathrm{m}=18 \mathrm{~g}$ $\mathrm{V}=100 \mathrm{ml}$ water $=0.1 \mathrm{~L}$ water $\mathrm{T}=300 \mathrm{~K}$ $\mathrm{R}=0.083 \mathrm{~L}$ bar mol $^{-1} \mathrm{~K}^{-1}$ $\Pi=$ ? Where $\Pi=$ osmotic pressure We know that, $\begin{aligned} & \Pi=\frac{w \mathrm{RT}}{\mathrm{MV}} \\ & =\frac{18 \times 0.0821 \times 300}{180 \times 0.1} \\ & =24.63 \mathrm{~atm} \end{aligned}$
MHT CET-03.05.2019
SOLUTIONS
277452
Assertion: Reverse osmosis is used for desalination of sea water. Reason: Reverse osmosis occurs when a pressure larger than the osmotic pressure is applied to the solution.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
The salt solution is subjected to pressure and pressure against the semi-permeable membrane. The applied pressure is greater than the osmotic pressure. When exerted pressure is greater than osmotic pressure $\mathrm{H}_{2} \mathrm{O}$ molecules go from lower concentration of $\mathrm{H}_{2} \mathrm{O}$ to higher concentration of water through semi-permeable membrane and this process is known as reverse osmosis. Hence, question is correct reason is correct explanation of assertion.
AIIMS 25 May 2019 (Evening)
SOLUTIONS
277453
pH of a $0.1 \mathrm{M}$ monobasic acid is found to be 2 . Hence, its osmotic pressure at a given temperature $T$ is
277454
If osmotic pressure of $4 \%(\mathrm{w} / \mathrm{v})$ solution of sucrose is same as $2 \%(\mathrm{w} / \mathrm{v})$ solution of ' $\mathrm{X}$ ', then the molecular mass of $X(\mathrm{~g} / \mathrm{mol})$ is
