Explain zone refining process with an example.

Describe the structure of diborane.

How will you prepare chlorine in the laboratory?

Give the uses of argon.

Calculate the number of unpaired electrons in Ti³⁺ , Mn²⁺ and calculate the spin only magnetic moment.

Explain why Cr²⁺ is strongly reducing while Mn³⁺ is strongly oxidizing.

In an octahedral crystal field, draw the figure to show splitting of d orbitals

Give the difference between double salts and coordination compounds.

Write short note on metal excess and metal deficiency defect with an example.

What is the two dimensional coordination number of a molecule in square close packed layer?

Explain briefly the collision theory of bimolecular reactions.

Explain pseudo first order reaction with an example.

The half life of a first order reaction x →products is 6.932 x 10⁴ s at 500K. What percentage of x would be decomposed on heating at 500K for 100 min. (e^0.06 = 1.06).

Calculate the pH of 1.5\(\times\)10^-3 M solution of Ba(OH)₂

Calculate the pH of 0.1M CH₃COOH solution. Dissociation constant of acetic acid is \(1.8\times10^{-5}\).

Why is AC current used instead of DC in measuring the electrolytic conductance?

Reduction potential of two metals M₁ and M₂ are \(E^{0}_{M^{2+}_{1}|M_{1}} = -2.3V\) and \(E^{0}_{M^{2+}_{1}|M_{1}} = 0.2V\) Predict which one is better for coating the surface of iron. Given : \(\mathrm{E}_{\mathrm{Fe}^{2+} \mid \mathrm{Fe}}^{\circ}=-0.44 \mathrm{~V}\)

Why are lyophillic colloidal sols are more stable than lyophobic colloidal sol.

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

Compound (A) C₆H₁₂O₂ on reduction with LiAlH₄ yields two compounds B and C. The compound (B) on oxidation gave (D) which on treatment with aqueous alkali and subsequent heating furnished E. The latter on catalytic hydrogenation gave (C). Compound (D) on oxidation gave monobasic acid (molecular formula weight = 60). Deduce the structure of (A), (B), (C), (D) and (E).

How will you convert benzaldehyde into the following compounds?
(i) benzophenone
(ii) benzoic acid
(iii) α-hydroxyphenylaceticacid.

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

What are reducing and non – reducing sugars?

Explain the mechanism of cleansing action of soaps and detergents.