Solutions's Question 19 | Chemistry XII - Part 1 | NCERT Exemplar Questions

MCQ (Single Correct Answer)

Consider the figure and mark the correct option.

Water will move from side $(A)$ to side $(B)$ if a pressure lower osmotic pressure is applied on piston (B)

Water will move from side $(B)$ to side $(A)$ if a pressure greater than osmotic pressure is applied on piston (B)

Water will move from side $(B)$ to side $(A)$ if a pressure equal to osmotic pressure is applied on piston (B)

Water will move from side $(A)$ to side $(B)$ if pressure equal to osmotic pressure is applied on piston (A)

MCQ (Single Correct Answer)

We have three aqueous solutions of NaCl labelled as ' A ', ' B ' and ' C ' with concentrations $0.1 \mathrm{M}, 0.01 \mathrm{M}$ and 0.001 M , respectively. The value of van't Hoff factor for these solutions will be in the order .......... .

$i_A< i_B< i_C$

$i_A>i_B>i_C$

$i_A=i_B=i_C$

$i_A< i_B> i_C$

MCQ (Single Correct Answer)

On the basis of information given below mark the correct option. Information

(i) In bromoethane and chloroethane mixture intermolecular interactions of $\mathrm{A}-\mathrm{A}$ and $\mathrm{B}-\mathrm{B}$ type are nearly same as $\mathrm{A}-\mathrm{B}$ type interactions.

(ii) In ethanol and acetone mixture $\mathrm{A}-\mathrm{A}$ or $\mathrm{B}-\mathrm{B}$ type intermolecular interactions are stronger than $A-B$ type interactions.

(iii) In chloroform and acetone mixture $\mathrm{A}-\mathrm{A}$ or $\mathrm{B}-\mathrm{B}$ type intermolecular interactions are weaker than $A-B$ type interactions.

Solution (ii) and (iii) will follow Raoult's law

Solution (i) will follow Raoult's law

Solution (ii) will show negative deviation from Raoult's law

Solution (iii) will show positive deviation from Raoult's law

MCQ (Single Correct Answer)

Two beakers of capacity 500 mL were taken. One of these beakers, labelled as " $A$ ", was filled with 400 mL water whereas the beaker labelled " $B^{\prime}$ was filled with 400 mL of 2 M solution of NaCl . At the same temperature both the beakers were placed in closed containers of same material and same capacity as shown in figure.

At a given temperature, which of the following statement is correct about the vapour pressure of pure water and that of NaCl solution?

Vapour pressure in container $(A)$ is more than that in container $(B)$

Vapour pressure in container $(A)$ is less than that in container $(B)$

Vapour pressure is equal in both the containers

Vapour pressure in container $(B)$ is twice the vapour pressure in container ( $A$ )

MCQ (Single Correct Answer)

If two liquids $A$ and $B$ form minimum boiling azeotrope at some specific composition then

$A-B$ interactions are stronger than those between $A-A$ or $B-B$

vapour pressure of solution increases because more number of molecules of liquids $A$ and $B$ can escape from the solution

vapour pressure of solution decreases because less number of molecules of only one of the liquids escape from the solution

$A-B$ interactions are weaker than those between $A-A$ or $B-B$

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