Aniline reacts with sodium nitrite and hydrochloric acid at 273-278K to give:
- AChlorobenzene
- ✓Benzene diazonium chloride
- Co-chloroaniline
- DBenzene
Answer: B.
View full solution →Question types
MODEL PAPER 9 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 9 questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
The reaction $C _2 H _5 ONa + C _2 H _5 I \rightarrow C _2 H _5 OC _2 H _5+ NaI$ is known as:
- ✓Williamson's synthesis
- BGrignard's synthesis
- CWurtz's synthesis
- DKolbe's synthesis
Answer: A.
View full solution →Iodoform test is given by
- AEthanoic acid
- BPentan-3-one
- CMethoxymethane
- ✓Pentan-2-one
Answer: D.
View full solution →Rate of reaction does not remain constant throughout because
- AThe density of reactants keep on changing
- ✓Concentration of reactants keep on changing
- CVolume of reactants keep on changing
- DTemperature of reactants keep on changing
Answer: B.
View full solution →Interstitial compounds are formed when small atoms are trapped inside the crystal lattice of metals. Which of the following is not the characteristic property of interstitial compounds?
- AThey retain metallic conductivity.
- BThey have high melting points in comparison to pure metals.
- ✓They are chemically very reactive.
- DThey are very hard.
Answer: C.
View full solution →Assertion (A): Ortho-nitrophenol is more acidic than phenol.
Reason (R): Nitro group is electron donating group and therefore stabilizes ortho-nitrophenoxide ion.
Reason (R): Nitro group is electron donating group and therefore stabilizes ortho-nitrophenoxide ion.
- ABoth 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.
- ✓A is true but R is false.
- DA is false but R is true.
Answer: C.
View full solution →Assertion (A): In comparison to ethyl chloride it is difficult to carry out nucleophilic substitution on vinyl chloride.
Reason (R): Vinyl group is electron-donating.
Reason (R): Vinyl group is electron-donating.
- ABoth 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.
- ✓A is true but R is false.
- DA is false but R is true.
Answer: C.
View full solution →Assertion (A): Halogen acids do not add on to carbonyl bond.
Reason (R): Addition depends upon the polarisation of HX and carbonyl bond.
Reason (R): Addition depends upon the polarisation of HX and carbonyl bond.
- ✓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): At isoelectric point, the amino group does not migrate under the influence of electric field.
Reason (R): At isoelectric point, amino acid exists as a zwitterion.
Reason (R): At isoelectric point, amino acid exists as a zwitterion.
- ABoth 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.
What happens when calcium ethanoate is dry distilled?
Define the terms: Van't Hoff factor
A person suffering from high blood pressure should take less common salt, why?
Answer the following$:$
$(a)$ Give two examples of non$-$chemical process which obeys the first order kinetics.
$(b)$ The following results have been obtained during the kinetic studies for the reaction:
$P+2Q → R + 2S$
Determine the rate law expression for the reaction.
View full solution →$(a)$ Give two examples of non$-$chemical process which obeys the first order kinetics.
$(b)$ The following results have been obtained during the kinetic studies for the reaction:
$P+2Q → R + 2S$
| Exp. | Initial $P(mol/L)$ | Initial $Q (mol/L)$ | Init. Rate of Formation of $R(M \ min-1)$ |
| $1$ | $0.10$ | $0.10$ | $3.0 \times 10^{-4}$ |
| $2$ | $0.30$ | $0.30$ | $9.0 \times 10^{-4}$ |
| $3$ | $0.10$ | $0.30$ | $3.0 \times 10^{-4}$ |
| $4$ | $0.10$ | $0.40$ | $6.0 \times 10^{-4}$ |
Transition metals can act as catalysts because these can change their oxidation state. How does $Fe(III)$ catalyze the reaction between iodide and persulphate ions?
View full solution →Explain with examples the terms weak and strong electrolytes.
What are ambident nucleophiles? Explain with an example.
Calculate the emf of the following cell at $25^{\circ} C$.$Fe \left| Fe ^{2+}(0.001 M )\right|\left| H ^{+}(0.01 M )\right| H _2(g)(1 bar ) \mid Pt ( s )$
Given that, $E_{ Fe ^{2+} / Fe }^o=-0.44 V ; E_{H^{+} / H_2}^o=0.00 V$
View full solution →Given that, $E_{ Fe ^{2+} / Fe }^o=-0.44 V ; E_{H^{+} / H_2}^o=0.00 V$
Write the major products in the following:
Give the structures and IUPAC names of the products expected from the following reactions:
a. Catalytic reduction of butanol.
b. Hydration of propene in the presence of dilute sulphuric acid.
c. Reaction of propanone with methyl magnesium bromide followed by hydrolysis.
a. Catalytic reduction of butanol.
b. Hydration of propene in the presence of dilute sulphuric acid.
c. Reaction of propanone with methyl magnesium bromide followed by hydrolysis.
i. Write the structure of main products when aniline reacts with the following reagents :
a. $Br _2$ water
b. HCl
c. $\left( CH _3 CO \right)_2 O /$ pyridine
ii. Arrange the following in the increasing order of their boiling point:$C _2 H _5 NH _2, C _2 H _5 OH ,\left( CH _3\right)_3 N$
iii. Give a simple chemical test to distinguish between the following pair of compounds : $\left( CH _3\right)_2 NH$ and $\left( CH _3\right)_3 N$.
View full solution →a. $Br _2$ water
b. HCl
c. $\left( CH _3 CO \right)_2 O /$ pyridine
ii. Arrange the following in the increasing order of their boiling point:$C _2 H _5 NH _2, C _2 H _5 OH ,\left( CH _3\right)_3 N$
iii. Give a simple chemical test to distinguish between the following pair of compounds : $\left( CH _3\right)_2 NH$ and $\left( CH _3\right)_3 N$.
i. How will you convert:
a. Nitrobenzene to phenol,
b. Aniline to chlorobenzene
a. Nitrobenzene to phenol,
b. Aniline to chlorobenzene
Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers$:$
$i. k \left[ Cr \left( H _2 O \right)_2\left( C _2 O _4\right)_2\right]$
$ii. \left[ Co ( en )_3\right] Cl _3$
$iii. \left[ Co \left( NH _3\right)_5\left( NO _2\right)\left( NO _3\right)_2\right]$
$iv. \left[ Pt \left( NH _3\left( H _2 O \right) Cl _2\right.\right.$
View full solution →$i. k \left[ Cr \left( H _2 O \right)_2\left( C _2 O _4\right)_2\right]$
$ii. \left[ Co ( en )_3\right] Cl _3$
$iii. \left[ Co \left( NH _3\right)_5\left( NO _2\right)\left( NO _3\right)_2\right]$
$iv. \left[ Pt \left( NH _3\left( H _2 O \right) Cl _2\right.\right.$
Write down the IUPAC name for each of the following complexes and indicate the oxidation state, electronic configuration, and coordination number. Also, give stereochemistry and magnetic moment of the complex:
$a. \left.K \left[ Cr \left( H _2 O \right)_2\right\}\left( C _2 O _4\right)_2\right] \cdot 3 H _2 O$
$b. \left[ Co \left( NH _3\right)_5 Cl \right] Cl _2$
$c. CrCl _3( py )_3$
$d. Cs \left[ FeCl _4\right]$
$e. K _4\left[ Mn ( CN )_6\right]$
View full solution →$a. \left.K \left[ Cr \left( H _2 O \right)_2\right\}\left( C _2 O _4\right)_2\right] \cdot 3 H _2 O$
$b. \left[ Co \left( NH _3\right)_5 Cl \right] Cl _2$
$c. CrCl _3( py )_3$
$d. Cs \left[ FeCl _4\right]$
$e. K _4\left[ Mn ( CN )_6\right]$
Attempt any five of the following:
(a) Why are polysaccharides considered non-sugars?
(b) What is meant by invert sugars?
(c) Write the name of the component of starch which is water-soluble.
(d) Write the products obtained after hydrolysis of DNA.
(e) Name the deficiency disease resulting from lack of vitamin A and E in the diet.
(f) Which vitamin is linked with anti-sterility?
(g) a. What is the difference between a nucleoside and nucleotide?
b. What products would be formed when a nucleotide from DNA containing thymine is hydrolysed?
(a) Why are polysaccharides considered non-sugars?
(b) What is meant by invert sugars?
(c) Write the name of the component of starch which is water-soluble.
(d) Write the products obtained after hydrolysis of DNA.
(e) Name the deficiency disease resulting from lack of vitamin A and E in the diet.
(f) Which vitamin is linked with anti-sterility?
(g) a. What is the difference between a nucleoside and nucleotide?
b. What products would be formed when a nucleotide from DNA containing thymine is hydrolysed?
Read the following text carefully and answer the questions that follow$:$ Raoult's law states that for a solution of volatile liquids, the partial vapour pressure of each component of the solution is directly proportional to its mole fraction present in solution. Dalton's law of partial pressure states that the total pressure $(P_{total})$ over the solution phase in the container will be the sum of the partial pressures of the components of the solution and is given as$: P_{total} = P1 + P2$
$i.$ Is the above$-$mentioned Raoult's law applicable for non$-$volatile liquids?
$ii.$ What type of deviation from Raoult's law does the above graph represent?
$iii.$ Give an example of such system. $OR$
$iii.$ A solution of two liquids boils at a temperature more than the boiling point of either of them. What type of deviation will be shown by the solution formed in terms of Raoult's law?
View full solution →$i.$ Is the above$-$mentioned Raoult's law applicable for non$-$volatile liquids?
$ii.$ What type of deviation from Raoult's law does the above graph represent?
$iii.$ Give an example of such system. $OR$
$iii.$ A solution of two liquids boils at a temperature more than the boiling point of either of them. What type of deviation will be shown by the solution formed in terms of Raoult's law?
The d-block of the periodic table contains the elements of the groups 3 to 12 and are known as transition elements. In general, the electronic configuration of these elements is $(n-1) d^{1-10} n s^{1-2}$. The d-orbitals of the penultimate energy level in their atoms receive electrons giving rise to the three rows of the transition metals i.e. 3d, 4d and 5d series. However, $Zn , Cd$ and Hg are not regarded as transition elements. Transition elements exhibit certain characteristic properties like variable oxidation stables, complex formation, formation of coloured ions, alloys, catalytic activity etc. Transition metals are hard (except $Zn , Cd$ and Hg ) and have a high melting point.
i. Why are $Zn , Cd$ and Hg non-transition elements?
ii. Which transition metal of 3d series does not show variable oxidation state?
iii. Why do transition metals and their compounds show catalytic activity?
OR
iii. Why are melting points of transition metals high?
View full solution →i. Why are $Zn , Cd$ and Hg non-transition elements?
ii. Which transition metal of 3d series does not show variable oxidation state?
iii. Why do transition metals and their compounds show catalytic activity?
OR
iii. Why are melting points of transition metals high?
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