List of practice Questions

Attempt any five of the following: (a) Cu\(^+\) is not stable in aqueous solution. Comment.

Give plausible explanation for the following: (a) Diazonium salts of aromatic amines are stable.
(b) Aniline does not undergo Friedel–Crafts reaction.
(c) Aniline on nitration gives a substantial amount of meta product.

Hydrolysis of sucrose: \[ \ce{C_{12}H_{22}O_{11} + H2O \xrightarrow{H^+} C_6H_{12}O_6 + C_6H_{12}O_6} \] (a) Rate law equation
(b) Molecularity and order of reaction
(c) What do you call such reactions?

Write the reaction of glucose with: (a) HI

(a) Draw the geometrical isomers of the complex \([ \text{Pt(NH}_3)_2\text{Cl}_2 ]\).

The electrical resistance of a column of 0.05 M NaOH solution of cell constant \( 50\ \text{cm}^{-1} \) is \( 4.5 \times 10^3\ \Omega \). Calculate its resistivity, conductivity and molar conductivity.

Calculate elevation of boiling point when 4 g of MgSO\(_4\) is dissolved in 100 g water. (Molar mass = 120 g/mol), \( K_b = 0.52\ \text{K kg mol}^{-1} \), assume complete ionisation.

Draw the structures of major monohalogenation products in the following reactions:

Account for the following: (i) CH\(_3\)CHO is more reactive than CH\(_3\)COCH\(_3\) towards reaction with HCN.

Give chemical tests to distinguish between the following pairs: (i) Propanal and Propanone

Assertion (A): Rate constant increases with increase in temperature.
Reason (R): Increasing the temperature of the substance increases the fraction of molecules which collide with energies greater than activation energy.

Assertion (A): Cu\(^{2+}\) iodide is not known.
Reason (R): Cu\(^{2+}\) has strong tendency to oxidise I\(^{-}\) to iodine.

The chemical test which can be used to distinguish between ethanamine and aniline is:

Assertion (A): Maltose is a reducing sugar.
Reason (R): Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.

Assertion (A): Acetamide (structure: \(\text{C}_6\text{H}_5\text{NHCOCH}_3\)) is less basic than aniline.
Reason (R): Acetylation of aniline results in decrease of electron density on nitrogen.

The IUPAC name of the complex \([ \text{Co(NH}_3 )_5(\text{NO}_2)]\text{Cl}_2\) is:

Considering the strength of the ligand, the highest excitation energy will be observed in:

Which of the following does not undergo aldol condensation?

The correct IUPAC name of \((\text{CH}_3)_3\text{C–CH}_2\text{Br}\) is:

The geometry of diamagnetic nickel complex \([ \text{Ni(CN)}_4 ]^{2-}\) is:

Out of Fe\(^{2+}\), Co\(^{2+}\), Cr\(^{3+}\), Ni\(^{2+}\), the one which shows highest magnetic moment is:

If amines are arranged in increasing order of their basic strength in gaseous phase, the correct order will be:

The most stable complex among the following is: