List of practice Questions

During dehydration of alcohol to alkene by heating with conc. H\(_2\)SO\(_4\), the initiation step is:

Answer the following about the complex \([Ti(H_2O)_6]^{3+}\):
(i) What happens to the colour of complex \([Ti(H_2O)_6]^{3+}\) when heated gradually?
(ii) Write the electronic configuration for \(d^5\) ion if \(\Delta_0<P\).
(iii) Write the hybridization and magnetic behaviour of the complex \([Ni(CO)_4]\).

Draw the structures of the major monohalo products in each of the following reactions:

The gas evolved when methylamine reacts with HNO\textsubscript{2 is:}

How do you prepare \(Na_2Cr_2O_7\) from \(Na_2CrO_4\) ?

Identify A, B, and C in the following reactions:

Give reasons for the following:
(I) Carboxylic acids do not give the characteristic reactions of the carbonyl group.
(II) Ethanoic acid is a stronger acid than ethanol.

Write the product(s) in the following reactions:

Wolff-Kishner Reduction
(II) Decarboxylation Reaction

Why do transition elements have high enthalpies of atomisation?

What is the effect of temperature on the electrical conductance of metallic conductors?

What is ‘Misch metal’? Give its one use.

The resistance of a conductivity cell containing 0.001 M KCl solution at 298 K is 1000 ohm. What is the cell constant if conductivity of 0.001 M KCl solution at 298 K is 0.125 × 10−3 S cm−1?

State Faraday’s first law of electrolysis. How much electricity, in terms of Faraday, is required to reduce one mole of MnO4− to Mn2+ ion?

Account for the following:
(I)Orange colour of \(\text{Cr}_2\text{O}_7^{2-}\) ion changes to yellow when treated with an alkali.
(II) Zn, Cd and Hg are non-transition elements.
(III) \(E^0\) value for \(\text{Mn}^{3+}/\text{Mn}^{2+}\) couple is highly positive (+1.57 V) as compared to \(\text{Cr}^{3+}/\text{Cr}^{2+}\).

What happens when:
(I) The manganate ion undergoes disproportionation reaction in acidic medium?
(II) KMnO4 is heated?