Question
Explain the general methods of preparation of amines.

Answer

SELF

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Why the reactivity of chlorobenzene towards nucleophilic substitution increase when electron withdrawing group ( $- NO _2$ ) is attached to the ortho and para positions? Explain.
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 :
$A / mol ^{-1}$0.200.200.40
$B / mol L ^{-1}$0.300.100.05
$r _0 / mol L ^{-1} s^{-1}$$5.07 \times 10^{-5}$$5.07 \times 10^{-5}$$1.43 \times 10^{-4}$
What is the order of the reaction with respect to A and B?
The air is a mixture of a number of gases. The major components are oxygen and nitrogen with approximate proportion of 20% is to 79% by volume at 298 K. The water is in equilibrium with air at a pressure of 10 atm. At 298 K if the Henry's law constants for oxygen and nitrogen at 298 K are 3.3 × 107 mm and 6.51 × 107 mm respectively. Calculate the composition of these gases in water.
The reaction between A and B is first order with respect to A and zero order with respect to B. Fill in the blanks in the following table :
Experiment$[ A ] / mol L ^{-1}$$[ B ] / mol L ^{-1}$Initial rate
$/ mol$ $L ^{-1} min^{-1}$
I0.10.1$2.0 \times 10^{-2}$
II-0.2$4.0 \times 10^{-2}$
III0.40.4-
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What do you understand by rate of a reaction? What factors affect the rate of a reaction? Discuss.
Write the formulas for the following coordination compounds:
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b. Potassium tetrahydroxidozincate(II)
c. Potassium trioxalatoaluminate(III)
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At $291K$, the molar conductivities at infinite dilution of $NH_4Cl, NaOH$ and $NaCl$ are $129.8, 217.4$ and $108.9S \ cm^2 mol^{-1}$ respectively. If the molar conductivity of a centinormal solution of $NH_4OH$ is $9.33S \ cm^2 mol^{-1},$ what is the percentage dissociation of $NH_4OH$ at this dilution? Also calculate the dissociation constant of $NH_4OH.$
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(ii) atomic and ionic sizes
(iii) oxidation state and
(iv) chemical reactivity.
Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers:
i. $\ce{k \left[ Cr \left( H _2 O \right)_2\left( C _2 O _4\right)_2\right]}$
ii. $\ce{\left[ Co ( en )_3\right] Cl _3}$
iii. $\ce{\left[ Co \left( NH _3\right)_5\left( NO _2\right)\left( NO _3\right)_2\right]}$
iv. $\ce{ \left [ Pt ( NH _3) ( H _2 O ) Cl _2\right].}$