Question
(i) How will you prepare methanol from formaldehyde without using a reducing agent?
(ii) Why is Rochelle salt used in Fehling's solution?
(ii) Why is Rochelle salt used in Fehling's solution?
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The rate of a reaction becomes four times when the temperature changes from 293 K to 313K. Calculate the energy of activation (Ea) of the reaction assuming that it does not change with temperature.
[R=8.314 J K-1 MOL-1, log 4=0.6021]
[R=8.314 J K-1 MOL-1, log 4=0.6021]
Explain why alcohols and ethers of comparable molecular mass have different boiling points?
The rate constant for the decomposition of ethyl iodide
C2H5l(g) → C2H4(g)+Hl(g)
at 600K is 1.60 × 10-5 s-1 . Its energy of activation is 209kJ/mol. Calculate the rate constant of the reaction at 700K.
C2H5l(g) → C2H4(g)+Hl(g)
at 600K is 1.60 × 10-5 s-1 . Its energy of activation is 209kJ/mol. Calculate the rate constant of the reaction at 700K.
Give the major products that are formed by heating the following ethers with HI.
$ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{|}\\\text{CH}_3-\text{CH}_2-\text{CH}_2-\text{O}-\text{C}-\text{CH}_2-\text{CH}_3\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{|}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3$
→$ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{|}\\\text{CH}_3-\text{CH}_2-\text{CH}_2-\text{O}-\text{C}-\text{CH}_2-\text{CH}_3\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{|}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3$
Calculate the value of EMF for the cell reaction :
$
\begin{array}{l}
Cu_{(s)}+2 Ag_{(aq)}^{+} \rightarrow Cu_{(aq)}^{2+}+2 Ag_{(s)} \\
E_{Cu^{+2} / Cu}^{o}=0.34 V \text { and } E_{Ag^{+} / Ag}^{o}=0.80 V
\end{array}
$
→$
\begin{array}{l}
Cu_{(s)}+2 Ag_{(aq)}^{+} \rightarrow Cu_{(aq)}^{2+}+2 Ag_{(s)} \\
E_{Cu^{+2} / Cu}^{o}=0.34 V \text { and } E_{Ag^{+} / Ag}^{o}=0.80 V
\end{array}
$
What happens when the vapours of a primary, secondary and tertiary alcohol are passed over heated copper at 573 K temperature? Explain with chemical equation.
Following data are obtained for the reaction:
N2O5 $\rightarrow$ 2NO2 + ½O2
→N2O5 $\rightarrow$ 2NO2 + ½O2
| t/s | 0 | 300 | 600 |
| [N2O5]/mol L–1 | 1.6 × 10–2 | 0.8 × 10–2 | 0.4 × 10–2 |
- Show that it follows first order reaction.
- Calculate the half-life.
Compare the chemistry of actinoids with that of the lanthanoids with special reference to:
Atomic and ionic sizes
Atomic and ionic sizes
Write common name and IUPAC name of following alcohol compound.
Explain the following with an example
(i) Reaction of phenol with zine dust.
(ii) Oxidation reaction of phenol.
(i) Reaction of phenol with zine dust.
(ii) Oxidation reaction of phenol.