Explain the following terms with suitable examples.
(i) Gangue
(ii) slag

AlCl₃ behaves like a lewis acid. Substantiate this statement.

How will you prepare chlorine in the laboratory?

Explain briefly how +2 states becomes more and more stable in the first half of the first row transition elements with increasing atomic number.

What is linkage isomerism? Explain with an example.

Explain AAAA and ABABA and ABCABC type of three dimensional packing with the help of neat diagram.

Hydrolysis of methyl acetate in aqueous solution has been studied by titrating the liberated acetic acid against sodium hydroxide. The concentration of an ester at different temperatures is given below.

t(min)	0	20	40	60	∝
v (ml)	20.2	25.6	29.5	32.8	50.4

Show that the reaction is the first order reactions.

Derive an expression for Ostwald’s dilution law.

The conductivity of a 0.01M solution of a 1 :1 weak electrolyte at 298K is 1.5\(\times\)10^-4 S cm⁻¹.
i) molar conductivity of the solution
ii) degree of dissociation and the dissociation constant of the weak electrolyte
Given that
\(\lambda^{0}_{cation}=248.2 \ S\) cm² mol^-1
\(\lambda^{0}_{anlon}=51.8 \ S\) cm² mol^-1

Peptising agent is added to convert precipitate into colloidal solution. Explain with an example.

Write the mechanism of acid catalysed dehydration of ethanol to give ethene.

Identify A, B, C and D
\(\text { ethanoic acid } \stackrel{\mathrm{SOCl}_{2}}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Pd} / \mathrm{BaSO}_{4}}{\longrightarrow} \mathrm{B} \stackrel{\mathrm{NaOH}}{\longrightarrow} \mathrm{C} \stackrel {\longrightarrow}{\triangle} \mathrm{D}\)

Arrange the following
i. In increasing order of solubility in water, C₆H₅ NH₂, (C₂H₅)₂NH, C₂H₅NH₂
ii. In increasing order of basic strength
a) aniline, p- toludine and p – nitroaniline
b) C₆H₅ NH₂, C₆H₅ NHCH₃, C₆H₅NH₂, p-Cl-C₆- H₄-NH₂
iii. In decreasing order of basic strength in gas phase
(C₂H₅)NH₂, (C₂H₅)NH, (C₂H₅)₅N and NH₃
iv. In increasing order of boiling point
C₆H₅OH, (CH₃)₂NH, C₂H₅NH₂
v. In decreasing order of the pK_b values
C₂H₅NH₂, C₆H₅NHCH₃.(C₂H₅)₂ NH and CH₃NH₂
vi. Increasing order of basic strength
C₂H₅NH₂,C₆H₅N(CH₃)₂, (C₂H₅)₂ NH and CH₃NH₂
vii. In decreasing order of basic strength

Give two difference between Hormones and vitamins.

Write the structural formula of aspirin.