Question
Explain the various methods of determining the order of a reaction.
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(a) What type of protein is present in keratin?
(b) Write the reactions showing the presence of following in the open structure of glucose:
i. an aldehyde group
ii. a primary alcohol
(c) What products would be formed when a nucleotide from DNA containing thymine is hydrolysed?
(d) Amino acids show amphoteric behaviour. Why?
(e) What are a Amino Acids? Give examples.
(f) a. How can you explain the absence of an aldehyde group in the pentaacetate of D-glucose?
b. Name the bases present in RNA. Which one of these is not present in DNA?
(g) Which monosaccharide units are present in starch, cellulose and glycogen and which linkages link these units?
(b) Write the reactions showing the presence of following in the open structure of glucose:
i. an aldehyde group
ii. a primary alcohol
(c) What products would be formed when a nucleotide from DNA containing thymine is hydrolysed?
(d) Amino acids show amphoteric behaviour. Why?
(e) What are a Amino Acids? Give examples.
(f) a. How can you explain the absence of an aldehyde group in the pentaacetate of D-glucose?
b. Name the bases present in RNA. Which one of these is not present in DNA?
(g) Which monosaccharide units are present in starch, cellulose and glycogen and which linkages link these units?
Answer the following questions:
Describe the preparation of potassium permanganate from pyrolusite ore. Write balanced chemical equation for one reaction to show the oxidizing nature of potassium permanganate.
Describe the preparation of potassium permanganate from pyrolusite ore. Write balanced chemical equation for one reaction to show the oxidizing nature of potassium permanganate.
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Derive a formula to determine the molar mass of a solute by depression of freezing point.
How is osmotic pressure determined by Berkeley-Hartley method ?
(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.
Write the IUPAC names of the following coordination compounds:
a. $\left[ Pt \left( NH _3\right)_2 Cl \left( NO _2\right]\right.$
b. $K _3\left[ Cr \left( C _2 O _4\right)_3\right]$
c. $\left[ CoCl _2( en )_2\right] Cl$
d. $\left[ Co \left( NH _3\right)_5\left( CO _3\right)\right] Cl$
e. $Hg \left[ Co ( SCN )_4\right]$
→a. $\left[ Pt \left( NH _3\right)_2 Cl \left( NO _2\right]\right.$
b. $K _3\left[ Cr \left( C _2 O _4\right)_3\right]$
c. $\left[ CoCl _2( en )_2\right] Cl$
d. $\left[ Co \left( NH _3\right)_5\left( CO _3\right)\right] Cl$
e. $Hg \left[ Co ( SCN )_4\right]$
Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with (i) iron(II) ions (ii) SO2 and (iii) oxalic acid? Write the ionic equations for the reactions.
Write short notes on the following :
(i) Kolbe's electrolytic reaction
(ii) Hell-Volhard-Zelinsky reaction
(iii) Esterification reaction
(iv) Decarboxylation reaction(v) Hunds-Diecker reaction
(i) Kolbe's electrolytic reaction
(ii) Hell-Volhard-Zelinsky reaction
(iii) Esterification reaction
(iv) Decarboxylation reaction(v) Hunds-Diecker reaction
- Define the following terms:
- Ideal solution.
- Azeotrope.
- Osmotic pressure.
- A solution of glucose (C6H12O6) in water is labelled as 10% by weight. What would be the molality of solution?
(Molar mass of glucose = 180 g mol-1).