Question
Explain the structure of starch and cellulose.
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- Mn shows the highest oxidation state of +7 with oxygen but with fluorine it shows the highest oxidation state of +4.
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19.5 g of CH2FCOOH is dissolved in 500 g of water. The depression in the freezing point of water observed is 1.0°C. Calculate the van't Hoff factor and dissociation constant of fluoroacetic acid. [If $K_f=1.86 K kg mol ^{-1}$ and density of solution $\left.=1.124 g mL ^{-1}\right]$
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Answer the following questions:
Is the variability in oxidation number of transition elements different from that of non–transition elements? Illustrate with examples.
Is the variability in oxidation number of transition elements different from that of non–transition elements? Illustrate with examples.
(a). Give reasons for the following:
(i)The reaction of ethanol with acetyl chloride is carried out in the presence of pyridine.
(ii) Cresols are less acidic than phenol.
(b). Williamson's process is used for the preparation of ethers from alkyl halide. Identify the alkyl bromide and sodium alkoxide used for the preparation of 2- Ethoxy-3-methylpentane
(c). Convert:
(i) Toluene to 3-nitrobenzoic acid.
(ii) Benzene to m-nitroacetophenone.
(i)The reaction of ethanol with acetyl chloride is carried out in the presence of pyridine.
(ii) Cresols are less acidic than phenol.
(b). Williamson's process is used for the preparation of ethers from alkyl halide. Identify the alkyl bromide and sodium alkoxide used for the preparation of 2- Ethoxy-3-methylpentane
(c). Convert:
(i) Toluene to 3-nitrobenzoic acid.
(ii) Benzene to m-nitroacetophenone.
In a reaction between A and B, the inital rate of reaction (ro) was measured for different initial concentrations of A and B as given below :
What is the order of the reaction with respect to A and B?
→| $A / mol ^{-1}$ | 0.20 | 0.20 | 0.40 |
| $B / mol L ^{-1}$ | 0.30 | 0.10 | 0.05 |
| $r _0 / mol L ^{-1} s^{-1}$ | $5.07 \times 10^{-5}$ | $5.07 \times 10^{-5}$ | $1.43 \times 10^{-4}$ |
Explain the electrophilic substitution reactions of amine.
What is meant by stability of a coordination compound in solution? State the factors which govern stability of complexes.
What is lanthanoid contraction? Write its reasons and results.
