MCQ
Under the same condition, how many $ml$ of $1M\, KOH$ and $0.5\,M\, H_2SO_4$ solution, respectively, when mixed to from a total volume of $100\, ml$, produce maximum rise in temperature ?
- A$67, 33$
- B$33,67$
- C$40, 60$
- ✓$50, 50$
$g$ equation = equivalent = Volume $\times$ normality
normality = molarity $\times n-$ factor
For newtralisation reaction,
$g$ equation of acid $=g$ equation of base
$v \times 0.5 \times 2=(100-v) \times 1 \times 1$
$\Rightarrow v=100-v$
$\Rightarrow 2 v=100$
$\Rightarrow v=50 ml$
$\therefore$ Volume of $H_2SO_4=v 50 ml$
and, Volume of $K O H=100-v=100-50=50 ml$
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$R - X \rightarrow R ^{\oplus} X ^{\ominus} \rightarrow R ^{\oplus} \| X ^{\ominus} \stackrel{ Y^\ominus }{\rightarrow} R - Y + X ^{\ominus}$
Ion pair Solvent separated ion pair
A student writes general characteristics based on the given mechanism as:
$(a)$ The reaction is favoured by weak nucleophiles
$(b)$ $R^ \oplus$ would be easily formed if the substituents are bulky
$(c)$ The reaction is accompained by recemization
$(d)$ The reaction is favoured by non-polar solvents.
Which observations are correct $?$
| List $I$ (molecules/ions) | List $II$ (No. of lone pairs of $e ^{-}$ on central atom) |
| $A$ $IF_7$ | $I$ Three |
| $B$ $ICl^{-}_4$ | $II$ One |
| $C$ $XeF_6$ | $III$ Two |
| $D$ $XeF_2$ | $IV$ Zero |
Choose the correct answer from the options given below: