Aniline does not undergo Friedel - Crafts reaction because:
Question types
MODEL PAPER 10 question types
37 questions across 6 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.
37
Questions
6
Question groups
5
Question types
01
M.C.Q (1 Marks)
12 Q→02Assertion (A) & Reason (B) MCQ
4 Q→032 Marks Questions
6 Q→043 Marks Question
8 Q→055 Marks Questions
5 Q→064 Marks Questions
2 Q→Sample Questions
MODEL PAPER 10 questions
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Williamson's synthesis is used for the preparation of
The reduction of ethanenitrile with sodium and alcohol gives:
The reaction $A \rightarrow B$ is a second order process when the initial concentration of $A$ is $0.50 M$, the half life is $8.0$ minutes. What is the half life if the initial concentration of $A$ is $0.10 M?$
View full solution →The compound which forms acetaldehyde when heated with dilute NaOH is:
Assertion (A): Aldehydes and ketones show condensation reactions.
Reason (R): The hydrogen atoms attached to $\alpha$-carbon of aldehydes and ketones are reactive.
View full solution →Reason (R): The hydrogen atoms attached to $\alpha$-carbon of aldehydes and ketones are reactive.
Assertion (A): Ammonolysis of alkyl halides is not a suitable method for the preparation of pure primary amines.
Reason (R): Ammonolysis of alkyl halides yields mainly secondary amines.
Reason (R): Ammonolysis of alkyl halides yields mainly secondary amines.
Assertion (A): Cellulose can be easily converted into fibres.
Reason (R): Cotton contains about 90% cellulose.
Reason (R): Cotton contains about 90% cellulose.
Assertion $(A):$ Dehydration of glycerol with $\ce{KHSO_4}$ gives acrolein.
Reason $(R):$ Acrolein is an $\alpha , \beta-$unsaturated aldehyde.
View full solution →Reason $(R):$ Acrolein is an $\alpha , \beta-$unsaturated aldehyde.
Based on solute$-$solvent interactions, arrange the following in order of increasing solubility in $n-$octane and explain. Cyclohexane, $\ce{KCl, CH_3OH, CH_3CN}.$
View full solution →Transition elements show high melting points. Why?
Name the type of isomerism when ambidentate ligands are attached to the central metal ion. Give two examples of ambidentate ligands.
Answer the following:
(a) A reaction is 50% complete in 2 hours and 75% complete in 4 hours. What is the order of the reaction?
(b) For which type of reactions, order and molecularity have the same value?
(a) A reaction is 50% complete in 2 hours and 75% complete in 4 hours. What is the order of the reaction?
(b) For which type of reactions, order and molecularity have the same value?
What happens when
i. a pressure greater than osmotic pressure is applied on the solution side separated from solvent by a semipermeable membrane?
ii. acetone is added to pure ethanol?
i. a pressure greater than osmotic pressure is applied on the solution side separated from solvent by a semipermeable membrane?
ii. acetone is added to pure ethanol?
Zinc rod is dipped in $0.1 M$ solution of $ZnSO _4$
The salt is $95 \%$ dissociated at is dilution at $298 K$ . Calculate the electrode potential. Given
$E ^0\left( Zn ^{2+} / Zn \right)=-0.76$
View full solution →The salt is $95 \%$ dissociated at is dilution at $298 K$ . Calculate the electrode potential. Given
$E ^0\left( Zn ^{2+} / Zn \right)=-0.76$
Give structures of the products you would except when each of the following alcohols
$i.$ Butan$-1-ol$
$ii.\ 2-$Methylbutan$-2-ol$ react with
$a.\ HCI - ZnCl_2$
$b.\ HBr$ and
$c.\ SOCI_2$
View full solution →$i.$ Butan$-1-ol$
$ii.\ 2-$Methylbutan$-2-ol$ react with
$a.\ HCI - ZnCl_2$
$b.\ HBr$ and
$c.\ SOCI_2$
The following results have been obtained during the kinetic studies of the reaction.
$2A + BC \rightarrow D$
Determine the rate law and the rate constant for the reaction.
View full solution →$2A + BC \rightarrow D$
| Experiment | $[A]/mol L^{-1}$ | $[B]/mol L^{-1}$ | Initial rate of formation of $D/mol L^{-1} \min^{-1}$ |
| $I$ | $0.1$ | $0.1$ | $6.0 x 10^{-3}$ |
| $II$ | $0.3$ | $0.2$ | $7.2 x 10^{-2}$ |
| $III$ | $0.3$ | $0.4$ | $2.88 \times 10^{-1}$ |
| $IV$ | $0.4$ | $0.1$ | $2.40 x 10^{-2}$ |
Determine the rate law and the rate constant for the reaction.
Calculate the emf of the following cell at $298 K$ .
$2 Cr(s)+3 Fe^{2+}(0.1 M) \rightarrow 2 Cr^{3+}(0.01 M)+3 Fe(s)$
Given, $E_{c r^{3+} / c r}^o=-0.74 V, E_{F e^{2+} / F e}^o=-0.44 V$
View full solution →$2 Cr(s)+3 Fe^{2+}(0.1 M) \rightarrow 2 Cr^{3+}(0.01 M)+3 Fe(s)$
Given, $E_{c r^{3+} / c r}^o=-0.74 V, E_{F e^{2+} / F e}^o=-0.44 V$
Attempt any five of the following:
(a) Which sugar is present in milk?
(b) Why must vitamin C be supplied regularly in diet?
(c) What type of substance is phenylanine hydroxylate? Write its importance.
(d) Define denaturation of protein. What is the effect of denaturation on the structure of protein?
(e) Name the linkage connecting monosaccharide units in polysaccharides.
(f) How do you explain the presence of all six carbon atoms in glucose in a straight chain?
(g) Write the reactions showing the presence of following in the open structure of glucose:
i. a carbonyl group
ii. chain with six carbon atoms
(a) Which sugar is present in milk?
(b) Why must vitamin C be supplied regularly in diet?
(c) What type of substance is phenylanine hydroxylate? Write its importance.
(d) Define denaturation of protein. What is the effect of denaturation on the structure of protein?
(e) Name the linkage connecting monosaccharide units in polysaccharides.
(f) How do you explain the presence of all six carbon atoms in glucose in a straight chain?
(g) Write the reactions showing the presence of following in the open structure of glucose:
i. a carbonyl group
ii. chain with six carbon atoms
$FeSO_4$ solution mixed with $\left( NH _4\right)_2 SO _4$ solution in $1:1$ molar ratio gives the test of $Fe ^{2+}$ ion but $CuSO _4$ solution mixed with aqueous ammonia in $1: 4$ molar ratio does not give the test of $Cu ^{2+}$ ion. Explain why?
View full solution →i. Tert$-$Butylamine cannot be prepared by the action of $NH_3$ on tert$-$butyl bromic. Explain why?
ii. Suggest a convenient method for the preparation of tert$-$butylamine.
View full solution →ii. Suggest a convenient method for the preparation of tert$-$butylamine.
State the reactions and reaction conditions for the following conversions:
i. Benzene diazonium chloride to nitrobenzene.
ii. Aniline to benzene diazonium chloride.
iii. Ethylamine to methylamine.
i. Benzene diazonium chloride to nitrobenzene.
ii. Aniline to benzene diazonium chloride.
iii. Ethylamine to methylamine.
a. Amongst the following, the most stable complex is:
i. $\left[ Fe \left( H _2 O \right)_6\right]^{3+}$
ii. $\left[ Fe \left( NH _3\right)_6\right]^{3+}$
iii. $\left[ Fe \left( C _2 O _4\right)_3\right]^{3-}$
iv. $\left[ FeCl _6\right]^{3+}$
b. What will be the correct order for the wavelength of absorption in the visible region for the following:
$
\left[Ni\left(NO_2\right)_6\right]^{4-},\left[Ni\left(NH_3\right)_6\right]^{2+},\left[Ni\left(H_2 O\right)_6\right]^{2+}
$
View full solution →i. $\left[ Fe \left( H _2 O \right)_6\right]^{3+}$
ii. $\left[ Fe \left( NH _3\right)_6\right]^{3+}$
iii. $\left[ Fe \left( C _2 O _4\right)_3\right]^{3-}$
iv. $\left[ FeCl _6\right]^{3+}$
b. What will be the correct order for the wavelength of absorption in the visible region for the following:
$
\left[Ni\left(NO_2\right)_6\right]^{4-},\left[Ni\left(NH_3\right)_6\right]^{2+},\left[Ni\left(H_2 O\right)_6\right]^{2+}
$
Vapour pressure of a liquid or a solution is the pressure exerted by the vapour in equilibrium with the liquid or solution at a particular temperature. It depends upon the nature of the liquid and temperature. The non$-$volatile solute in solution reduces the escaping tendency of the solvent molecules in the vapour phase because some of the solute particles occupy the positions of the solvent molecules on the liquid surface. The relative lowering of the vapour pressure of a solution containing a non$-$volatile solute is equal to the mole fraction of the solute in the solution. This is also known as Raoult's law. However, for solutions of volatile solutes, the vapour pressure of a component in a solution at a given temperature is equal to the mole fraction of that component in the solution multiplied by the vapour pressure of that pure component. The solutions in which each component obeys Raoult's law is called an ideal solution. For ideal solutions $\Delta H_{\text {mixing }}$ and $\Delta V_{\text {mixing }}$ are also zero. Practically no solution is ideal. A non$-$ideal solution is that solution in which solute and solvent molecules interact with one another with a different force than the forces of interaction between the molecules of the pure components. There are two types of non$-$ideal solutions, showing positive deviations and negative deviations from ideal behaviour. If for the two components $A$ and $B$ , the forces of interaction between $A$ and $B$ molecules are less than the $A-A$ and $B-B$ interactions, the non$-$ideal solutions have positive deviations. On the other hand, if the forces of interaction between $A$ and $B$ molecules are more than the $A-A$ and $B-B$ interactions, the non$-$ideal solutions have negative deviations.
$i.$ What is the mole fraction of $A$ in solution obeying result's low if the vapour pressure of a pure liquid $A$ is $40 mm$ of $Hg$ at $300 K .$ The vapour pressure of this liquid in solution with liquid $B$ is $32\ mm$ of $Hg ?$
$ii.$ Vapour pressure of a solution of heptane $\&$ octane is given by the equation: $(1) P ( sol ).( mm Hg )=35+65 x$, where $x$ is the mole fraction of heptane. Calculate the vapour pressure of pure octane.
$iii.$ What is the value of $\Delta V _{\text {mixing }}$ and $\Delta H _{\text {mixing }}$ for non$-$ideal solution showing negative deviation?
OR
$iii.$ Acetic acid $+$ pyridine, the mixture is an example of which type of solution?
View full solution →$i.$ What is the mole fraction of $A$ in solution obeying result's low if the vapour pressure of a pure liquid $A$ is $40 mm$ of $Hg$ at $300 K .$ The vapour pressure of this liquid in solution with liquid $B$ is $32\ mm$ of $Hg ?$
$ii.$ Vapour pressure of a solution of heptane $\&$ octane is given by the equation: $(1) P ( sol ).( mm Hg )=35+65 x$, where $x$ is the mole fraction of heptane. Calculate the vapour pressure of pure octane.
$iii.$ What is the value of $\Delta V _{\text {mixing }}$ and $\Delta H _{\text {mixing }}$ for non$-$ideal solution showing negative deviation?
OR
$iii.$ Acetic acid $+$ pyridine, the mixture is an example of which type of solution?
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