MCQ
When a solution is diluted at constant temperature, its vapour pressure:
- ✓Increases
- BDecreases
- CRemains same
- DMay increase or decrease
✓
Answer
Correct option: A.
Increases
When a solution is diluted at a constant temperature, its vapour pressure increases.
When the solution is diluted, the mole fraction of solute decreases and the mole fraction of solvent increases.
Hence, the relative lowering in vapour pressure decreases and the vapor pressure increases.
When the solution is diluted, the mole fraction of solute decreases and the mole fraction of solvent increases.
Hence, the relative lowering in vapour pressure decreases and the vapor pressure increases.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Iodine deficiency in diet causes
The drug given during hypertension is?
Number of moles of $AgCl$ formed in the following reaction is $........$.
→Products obtained are
Which of the following statements is not correct?
Number of complexes which will exhibit synergic bonding amongst, $[ Cr ( CO )_{6}], [ Mn ( CO )_{5}]$ and $[ Mn _{2}( CO )_{10}]$ is ..... .
→Which of the following reaction will give carbonyl compound as major product ?
Match list $- I$ and List $- II.$
→| List $-I$ | List $-II$ | ||
|
$(a)$ |
$\begin{array}{*{20}{c}} {O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {R - C - Cl \to R - CHO} \end{array}$ |
$(i)$ |
$Br _{2} / NaOH$ |
| $(b)$ | $\begin{array}{*{20}{c}} {R - C{H_2} - COOH \to R - CH - COOH} \\ {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl} \end{array}$ |
$(ii)$ | $H _{2} / Pd - BaSO _{4}$ |
| $(c)$ | $\begin{array}{*{20}{c}} {O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {R - C - N{H_2} \to R - N{H_2}} \end{array}$ |
$(iii)$ | $Zn ( Hg ) /$ Conc. $HCl$ |
| $(d)$ | $\begin{array}{*{20}{c}} {O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {R - C - C{H_3} \to R - C{H_2} - C{H_3}} \end{array}$ |
$(iv)$ | $Cl _{2}$ / Red $P , H _{2} O$ |
Choose the correct answer from the options given below:
Identify '$B$' in the reactionAcetamide $\mathop {\xrightarrow{{{P_2}{O_5}}}}\limits_\Delta A\xrightarrow{{4H}}B$
→Milk is an example of: