Question
What is meant by the chelate effect? Give an example.
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How the following conversions can be carried out?
Ethanol to But-2-yne.
Ethanol to But-2-yne.
Explain why $\ce{[Fe(H_2O)_6]^{3+}}$ has magnetic moment value of $5.92BM$ whereas $\ce{[Fe(CN)_6]^{3-}}$ has a value of only $1.74BM.$
→(i) Give the structure of haloalkane having five carbon by which optical isomerism is shown.
(ii) Which type of isomerism is present in 1-chloro butane and 1-chloro-2-methyl propane.
(iii) Write the position isomers of the compound having molecular formula $C _4 H _9 Cl$, which have straight chain.
→(ii) Which type of isomerism is present in 1-chloro butane and 1-chloro-2-methyl propane.
(iii) Write the position isomers of the compound having molecular formula $C _4 H _9 Cl$, which have straight chain.
$3.9 g$ of benzoic acid dissolved in $49 g$ of benzene shows a depression in freezing point of $1.62 K.$ Calculate the van't Hoff factor and predict the nature of solute $($associated or dissociated$).$
$($Given: Molar mass of benzoic acid $= 122\ g\ mol^{-1}, K_f$ for benzene $= 4.9 K \ kg\ mol^{-1})$
→$($Given: Molar mass of benzoic acid $= 122\ g\ mol^{-1}, K_f$ for benzene $= 4.9 K \ kg\ mol^{-1})$
In the button cells widely used in watches and other devices the following reaction takes place:
$Zn(s) + Ag_2O(s) + H_2O(l) \rightarrow Zn^{2+}(aq) + 2Ag(s) + 2OH^– (aq)$
Determine $\triangle_\text{r}\text{G}^\ominus$ and $\text{E}^\ominus$ for the reaction.
→$Zn(s) + Ag_2O(s) + H_2O(l) \rightarrow Zn^{2+}(aq) + 2Ag(s) + 2OH^– (aq)$
Determine $\triangle_\text{r}\text{G}^\ominus$ and $\text{E}^\ominus$ for the reaction.
Carbonyl group is present in carboxylic acids and their derivatives, yet they do not show the properties of carboxylic group, why?
Silver crystallises in fcc lattice. If edge length of the cell is $ 4.077\times10^{-8} $ cm and density is 10.5 g $ cm^{-3} $, calculate the atomic mass of silver.
→- Using valence bond theory, predict the shape and magnetic character of
- $\ce{[Ni(CO)_4]. [Ni = 28]}.$
- Give one example of application of coordination compounds$-$in medicine.
A certain reaction is $50\%$ complete in $20$ minutes at $300K$ and the same reaction is again $50\%$ complete in $5$ minutes at $350K$. Calculate the activation energy if it is a first order reaction.
$[R = 8.314\ J K^{–1} mol^{–1} ; \log 4 = 0.602]$
→$[R = 8.314\ J K^{–1} mol^{–1} ; \log 4 = 0.602]$
Give reasons-
(a) The bond length of C-O bond in phenol is less than that of methanol.
(b) C-O-C bond angle present in ether is more than tetrahedral angle.
(c) Boiling point decreases on increasing branching in isomeric alcohols.
(a) The bond length of C-O bond in phenol is less than that of methanol.
(b) C-O-C bond angle present in ether is more than tetrahedral angle.
(c) Boiling point decreases on increasing branching in isomeric alcohols.