HSC Science इयत्ता १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Chemistry

Reduction potential of two metals M₁ and M₂ are \[\ce{E^0_{{M_1^{2+}|M_1}}}\] = −2.3 V and \[\ce{E^0_{{M_2^{2+}|M_2}}}\] = 0.2 V. Predict which one is better for coating the surface of iron.
Given: \[\ce{E^0_{{Fe^{2+}|Fe}}}\] = −0.44 V

A copper electrode is dipped in 0.1 M copper sulphate solution at 25°C. Calculate the electrode potential of copper.
[Given: \[\ce{E^0_{{Cu^{2+}|Cu}}}\] = 0.34 V]

For the cell \[\ce{Mg_{(s)}|Mg^{2+}_{( aq)}||Ag^+_{( aq)}|Ag_{(s)}}\], calculate the equilibrium constant at 25°C and maximum work that can be obtained during operation of cell.
Given: \[\ce{E^0_{{Mg^{2+}|Mg}}}\] = −2.37 V and \[\ce{E^0_{{Ag^{+}|Ag}}}\] = 0.80 V

Write a note on sacrificial protection.

An alkene “A” on reaction with O₃ and Zn – H₂O gives propanone and ethanol in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is

Product ‘P’ in the above reaction is:

Ammonium salt of benzoic acid is heated strongly with P₂O₅ and the product so formed is reduced and then treated with NaNO₂/HCl at low temperature. The final compound formed is ____________.

Identify X in the sequence given below

The major product of the following reaction:

Write a short note on the following.

Coupling reaction

Write a short note on the following.

Gomberg reaction

Account for the following.

Diazonium salts of aromatic amines are more stable than those of aliphatic amines.

Account for the following.

Amines are more basic than amides.

Identify A, B, C and D.

\[\ce{aniline + benzaldehyde -> A ->[Conc. HNO3][B] C + D}\]

A dibromo derivative (A) on treatment with KCN followed by acid hydrolysis and heating gives a monobasic acid (B) along with the liberation of CO₂. (B) on heating with liquid ammonia followed by treating with Br₂/KOH gives (C) which on treating with NaNO₂ and HCl at low temperature followed by oxidation gives a monobasic acid (D) having molecular mass 74. Identify A to D.

What are the functions of lipids in living organisms?

Write a note on synthetic detergents.

Explain the mechanism of cleansing action of soaps and detergents.

  Identify the product (s) is / are formed when 1 – methoxy propane is heated with excess HI. Name the mechanism involved in the reaction 

Write the Zwitter ion structure of alanine