Question
Write the structure of A, B, C, D and E in the following reactions:
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The decomposition of $N_2O_5(g)$ is a first order reaction with a rate constant of $5 \times 10^{-4} s^{-1} \ at \ 45^\circ C$, i.e., $2N_2O_5(g) \rightarrow 4NO_2(g) + O_2(g)$. If initial concentration of $N_2O_5$ is $0.25M$, calculate its concentration after $2\ min$. Also, calculate half- life for decomposition of $N_2O_5(g).$
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 Match the complex species given in Column $I$ with the possible isomerism given in Column $II$ and assign the correct code:
 
Column $I ($Complex species$)$
 
Column $II ($Isomerism$)$
$a.$ $[Co(NH_3)_4C_{l2}]^+$ $1.$
Optical
$b.$ $cis-[Co(en)_2Cl_2]^+$ $2.$
Ionisation
$c.$ $[Co(NH_3)_5 (NO_2)]Cl_2$ $3.$
Coordination
$d.$ $[Co(NH_3)_6][Cr(CN)_6]$ $4.$
Geometrical
    $5.$
Linkage
Code:
Predict the products of electrolysis in each of the following : 
(i) An aqueous solution of AgNO3 with silver electrodes.
(ii) An aqueous solution of AgNO3 with platinum electrodes.
(iii) An aqueous solution of H2SO4 with platinum electrodes.
(iv) An aqueous solution of CuCl2 with platinum electrodes.
A mixed oxide of iron and chromium, $\ce{FeOCr_2O_3}$ is fused with sodium carbonate in the presence of air to form a yellow coloured compound $(A).$ On acidification the compound $(A)$ forms an orange coloured compound $(B),$ which is a strong oxidising agent.
  1. Identify the compounds $(A)$ and $(B).$
  2. Write balanced chemical equation for each step.
Attempt any five of the following:
(a) Aldopentoses named ribose and 2-deoxyribose are found in nucleic acids. What is their relative configuration?
(b) What are the three components of nucleic acids?
(c) Name the sugar present in milk. How many monosaccharide units are present in it? What are such oligosaccharides called?
(d) Is nucleotide and nucleoside the same? What are their roles?
(e) Why cannot vitamin C be stored in our body?
(f) During curdling of milk, what happens to sugar present in it?
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a. There are 5-OH groups in glucose.
b. Glucose is a reducing sugar
$\ce{COSO_4Cl._5NH_3}$ exists in two isomeric forms $'A\ '$ and $'B\ '.$ Isomer $'A\ '$ reacts with $AgNO_3$ to give white precipitate but does not react with $BaCl_2.$ Isomer $'B\ '$ gives a white precipitate with $BaCl_2$ but does not react with $AgNO_3.$ Answer the following questions.
i. Identify $'A\ '$ and $'B\ '$ and write their structural formulas.
ii. Name the type of isomerism involved.
iii. Give the $\text{IUPAC}$ name of $'A\ '$ and $'B\ '.$
Answer the following questions.
Comment on the specificity of enzyme action. What is the most important reason for their specificity?