Aniline does not undergo Friedel $-$ Crafts reaction because$:$
- AAnilium ion deactivates any further reaction
- BAluminium chloride reacts with Aniline
- CAll of these
- ✓$AlCl_3$ act as a catalyst
Answer: D.
View full solution →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
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Williamson's synthesis is used for the preparation of
- Aaldehydes
- ✓ethers
- Calkyl halides
- Dalcohols
Answer: B.
View full solution →The reduction of ethanenitrile with sodium and alcohol gives:
- ✓1-aminoethane
- BEthanamide
- C1-aminopropane
- DEthanoic acid
Answer: A.
View full solution →The following experimental rate data were obtained for a reaction carried out at $25^{\circ} C :$
$A_{(g)}+B_{(g)} \rightarrow C_{(g)}+D_{(g)}$
$A_{(g)}+B_{(g)} \rightarrow C_{(g)}+D_{(g)}$
| Initial $[A_{(g)}]/mol \ dm^{-3}$ | Initial $[B_{(g)}]/mol \ dm^{-3}$ | Initial rate$/mol \ dm^{-3}S^{-1}$ |
| $3.0 \times 10^{-2}$ | $2.0 \times 10^{-2}$ | $1.89 \times 10^{-4}$ |
| $3.0 \times 10^{-2}$ | $4.0 \times 10^{-2}$ | $1.89 \times 10^{-4}$ |
| $6.0 \times 10^{-2}$ | $4.0 \times 10^{-2}$ | $7.56 \times 10^{-4}$ |
- AOrder with respect to $A_{(g)} -$ Second Order with respect to $B_{(g)} -$ First
- BOrder with respect to $A_{(g)} -$ Zero Order with respect to $B_{(g)} -$ Second
- COrder with respect to $A_{(g)} -$ First Order with respect to $B_{(g)} -$ Zero
- ✓Order with respect to $A_{(g)} -$ Second Order with respect to $B_{(g)} -$ Zero
Answer: D.
View full solution →Silver ornaments turn black by the presence of which gas in the atmosphere?
- ✓$H_2S$
- B$O_2$
- C$Cl_2$
- D$N_2$
Answer: A.
View full solution →Assertion $(A):$ Dehydration of glycerol with $\ce{KHSO_4}$ gives acrolein.
Reason $(R):$ Acrolein is an $\alpha ,$ $\beta-$unsaturated aldehyde.
Reason $(R):$ Acrolein is an $\alpha ,$ $\beta-$unsaturated aldehyde.
- ✓Both $A$ and $R$ are true and $R$ is the correct explanation of $A.$
- BBoth $A$ and $R$ are true but $R$ is not the correct explanation of $A.$
- C$A$ is true but $R$ is false.
- D$A$ is false but $R$ is true.
Answer: A.
View full solution →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.
- ABoth Assertion (A) and Reason (R) are true and Reason (R) is not the correct
- BBoth Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- ✓Assertion (A) is true, but Reason (R) is false
- DAssertion (A) is false, but Reason (R) is true.
Answer: C.
View full solution →Assertion (A): Aldehydes and ketones show condensation reactions.
Reason (R): The hydrogen atoms attached to $\alpha$-carbon of aldehydes and ketones are reactive.
Reason (R): The hydrogen atoms attached to $\alpha$-carbon of aldehydes and ketones are reactive.
- ✓Both A and R are true and R is the correct explanation of A.
- BBoth A and R are true but R is not the correct explanation of A.
- CA is true but R is false.
- DA is false but R is true.
Answer: A.
View full solution →Assertion (A): Cellulose can be easily converted into fibres.
Reason (R): Cotton contains about 90% cellulose.
Reason (R): Cotton contains about 90% cellulose.
- ABoth A and R are true and R is the correct explanation of A.
- ✓Both A and R are true but R is not the correct explanation of A.
- CA is true but R is false.
- DA is false but R is true.
Answer: B.
View full solution →Write the structures of A, B, C, D and E in the following reactions.
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?
Based on solute-solvent interactions, arrange the following in order of increasing solubility in $n-$octane and explain. Cyclohexane, $KCl,$ $CH_3OH, CH_3CN.$
View full solution →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?
Transition elements show high melting points. Why?
Calculate the emf of the following cell at $298 K .$
$\ce{2Cr(s) + 3Fe^{2+}(0.1 M) \rightarrow 2Cr^{3+}(0.01M) + 3Fe(s)}$
Given, $E_{c r^{3+} / c r}^o=-0.74 V, E_{F e^{2+} / F e}^o=-0.44 V$
View full solution →$\ce{2Cr(s) + 3Fe^{2+}(0.1 M) \rightarrow 2Cr^{3+}(0.01M) + 3Fe(s)}$
Given, $E_{c r^{3+} / c r}^o=-0.74 V, E_{F e^{2+} / F e}^o=-0.44 V$
Calculate the e.m.f at $25^{\circ} c$ for the following cell:
$N i(s)\left|N i^{2+}(0.01 M) \| C u^{2+}(0.1 M)\right| C u(s)$
Given: $E ^0 Ni ^{+2} / Ni =-0.25 V$
$E_{C u^{2+} / C u}^0=+0.34 V$
$\left[1 F=96,500 Cmol ^{-1}\right]$. Calculate the maximum work that can be accomplished by the operation of this cell
View full solution →$N i(s)\left|N i^{2+}(0.01 M) \| C u^{2+}(0.1 M)\right| C u(s)$
Given: $E ^0 Ni ^{+2} / Ni =-0.25 V$
$E_{C u^{2+} / C u}^0=+0.34 V$
$\left[1 F=96,500 Cmol ^{-1}\right]$. Calculate the maximum work that can be accomplished by the operation of this cell
Draw structures of the following derivatives:
i. 2,4-Dinitrophenylhydrazone of benzaldehyde
ii. Cyclopropanone oxime
iii. Acetaldehydedimethylacetal
i. 2,4-Dinitrophenylhydrazone of benzaldehyde
ii. Cyclopropanone oxime
iii. Acetaldehydedimethylacetal
Explain how does the - OH group attached to a carbon of benzene ring activate it towards electrophilic substitution?
$i.$ 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.
$FeSO_4$ 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 →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+}
$
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
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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