Question
Explain relationship between $E _{\text {cell }}^{\circ}$ and equilibrium constant with the help of Nernst equation.
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- Account for the following:
ii. $Cr ^{2+}$ is a strong reducing agent.
iii. $Cu ^{2+}$ salts are coloured while $Zn ^{2+}$ salts are white.
- Complete the following equations:
- $2\text{MnO}_{2} + 4\text{KOH} + \text{O}_{2} \xrightarrow{\Delta}$
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Write the $S _{ N } 1$ mechanism of unimolecular nucleophilic substitution reaction.
→Explain the structure of different disaccharides.
$(a).$ A purple colour compound $A,$ which is a strong oxidising agent and used for bleaching of wool, cotton, silk and other textile fibres was added to each of the three test tubes along with $H_2SO_4.$ It was followed by strong heating.
In which of the above test tubes; $A, B$ or $C:$
$(i)$ Violet vapours will be formed
$(ii)$ The bubbles of gas evolved will extinguish a burning matchstick. Write an equation for each of the above observations.
$b.$ A metal ion $M^{n+}$ of the first transition series having $d^5$ configuration combines with three didentate ligands. Assuming $\Delta_0< P:$
$(i)$ Draw the crystal field energy level diagram for the $3d$ orbital of this complex.
$(ii)$ What is the hybridisation of $Mnt$ in this complex and why?
$(iii)$ Name the type of isomerism exhibited by this complex.
→In which of the above test tubes; $A, B$ or $C:$
$(i)$ Violet vapours will be formed
$(ii)$ The bubbles of gas evolved will extinguish a burning matchstick. Write an equation for each of the above observations.
$b.$ A metal ion $M^{n+}$ of the first transition series having $d^5$ configuration combines with three didentate ligands. Assuming $\Delta_0< P:$
$(i)$ Draw the crystal field energy level diagram for the $3d$ orbital of this complex.
$(ii)$ What is the hybridisation of $Mnt$ in this complex and why?
$(iii)$ Name the type of isomerism exhibited by this complex.
$(a).$ While giving intravenous injections to the patients, the doctors take utmost care of the concentration of the solution used. Why is it necessary to check the concentration of the solution?
$(b).$ A solution of phenol was obtained by dissolving $2 \times10^{-2} \ kg$ of phenol in $1 \ kg$ of benzene. Experimentally it was found to be $73\%$ associated. Calculate the depression in the freezing point recorded.
→$(b).$ A solution of phenol was obtained by dissolving $2 \times10^{-2} \ kg$ of phenol in $1 \ kg$ of benzene. Experimentally it was found to be $73\%$ associated. Calculate the depression in the freezing point recorded.
Write the structures of reagents/ organic compounds (A to F) in the following sequence of reactions:
Match the graph given in Column I with the order of reaction given in Column II. More than one item in Column I may link to the same item of Column II.
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Column I
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Column II
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(i)
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(ii)
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(a)
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$I^{st}$ order
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(iii)
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(b)
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Zero order
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(iv)
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Match the coordination compounds given in Column I with the central metal atoms given in Column II and assign the correct code:
Code:
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Column I (Coordination Compound)
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Column II (Central metal atom)
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a.
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Chlorophyll
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1.
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Rhodium
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b.
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Blood pigment
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2.
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Cobalt
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c.
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Wilkinson catalyst
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3.
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Calcium
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d.
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Vitamin $B_{12}$
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4.
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Iron
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5.
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Magnesium
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- A (5), B (4), C (1), D (2).
- A (3), B (4), C (5), D (1).
- A (4), B (3), C (2), D (1).
- A (3), B (4), C (1), D (2).
What is the role of adsorption in heterogenous catalysis?
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After reading the above passage, answer the following:
After reading the above passage, answer the following:
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