Question
Write a note on halogenation of phenol.
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An element 'X' (At mass = 40 g $ mol^{-1} $) having fcc structure has unit cell edge length of 400 pm. Calculate the density of 'X' and the number of unit cell in 4 g of 'X'. $ (N_{A}=6.022\times10^{23}mol^{-1}) $.
→Complete the following giving the structures of major organic products.
$(\text{CH}_3)_3-\text{C}-\text{CH}_2-\text{Br}\xrightarrow[\Delta]{\text{C}_2\text{H}_5\text{ONa}/\text{C}_2\text{H}_5\text{OH}}\ ........$
→$(\text{CH}_3)_3-\text{C}-\text{CH}_2-\text{Br}\xrightarrow[\Delta]{\text{C}_2\text{H}_5\text{ONa}/\text{C}_2\text{H}_5\text{OH}}\ ........$
Calculate the charge of one mole of electrons.
Give equations of the following reactions:
i. Oxidation of propan-1-ol with alkaline KMnO4 solution.
ii. Bromine in CS2 with phenol.
iii. Dilute HNO3 with phenol.
iv. Treating phenol with chloroform in presence of aqueous NaOH.
i. Oxidation of propan-1-ol with alkaline KMnO4 solution.
ii. Bromine in CS2 with phenol.
iii. Dilute HNO3 with phenol.
iv. Treating phenol with chloroform in presence of aqueous NaOH.
Indicate the steps in the preparation of:
K2Cr2O7 from chromite ore.
K2Cr2O7 from chromite ore.
Nitric oxide, NO, reacts with oxygen to produce nitrogen dioxide.
$\text{2NO(g)+O}_2(\text{g)}\rightarrow\text{2NO}_2\text{(g)}$
The rate law for this reaction is:
$\text{Rate = k}[\text{NO]}^2[\text{O]}_2$
Propose a machanism for the reaction.
→$\text{2NO(g)+O}_2(\text{g)}\rightarrow\text{2NO}_2\text{(g)}$
The rate law for this reaction is:
$\text{Rate = k}[\text{NO]}^2[\text{O]}_2$
Propose a machanism for the reaction.
What happens when phenol reacts with: (i) Na (ii) dil. $ HNO_{3} $
→Define the following with an example of each:
- Polysaccharides.
- Denatured protein.
- Essential amino acids.
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]
The molar conductivity of 0.025 mol L–1 methanoic acid is 46.1 S cm2 mol–1. Calculate its degree of dissociation and dissociation constant. Given λ0 (H+) = 349.6 S cm2 mol–1 and λ0 (HCOO–) = 54.6 S cm2 mol-1.