HSC Science Class 12 - Tamil Nadu Board of Secondary Education Question Bank Solutions

Calculate the standard emf of the cell: \[\ce{Cd|Cd^{2+}||Cu^{2+}|Cu}\] and determine the cell reaction. The standard reduction potentials of Cu²⁺|Cu and Cd²⁺|Cd are 0.34 V and −0.40 volts respectively. Predict the feasibility of the cell reaction.

In fuel cell H₂ and O₂ react to produce electricity. In the process, H₂ gas is oxidised at the anode and O₂ at cathode. If 44.8 litre of H₂ at 25°C and 1 atm pressure reacts in 10 minutes, what is average current produced? If the entire current is used for electro deposition of Cu from Cu²⁺, how many grams of deposited?

The same amount of electricity was passed through two separate electrolytic cells containing solutions of nickel nitrate and chromium nitrate respectively. If 2.935 g of Ni was deposited in the first cell. The amount of Cr deposited in the another cell?
Given: molar mass of Nickel and chromium are 58.74 and 52 gm⁻¹ respectively.

8.2 × 10¹² litres of water is available in a lake. A power reactor using the electrolysis of water in the lake produces electricity at the rate of 2 × 10⁶ Cs⁻¹ at an appropriate voltage. How many years would it like to completely electrolyse the water in the lake? Assume that there is no loss of water except due to electrolysis.

Derive an expression for the Nernst equation.

Explain the function of H₂ – O₂ fuel cell.

Describe some features of catalysis by zeolites.

Williamson's synthesis of preparing dimethyl ether is a/an ____________.

A Compound (A) with molecular formula C₂H₃N on acid hydrolysis gives (B) which reacts with thionyl chloride to give compound (C). Benzene reacts with compound (C) in presence of anhydrous AlCl₃ to give compound (D). Compound (D) on reduction with Zn/Hg and Conc. HCl gives (E). Identify (A), (B), (C), (D) and (E). Write the equations.

Identify compounds A, B and C in the following sequence of reaction.

\[\ce{C6H5N2Cl ->[CuCN] A ->[H2O/H^+] B ->[NH3] C}\]

Identify compounds A, B and C in the following sequence of reaction.

\[\ce{CH3CH2I ->[NaCN] A ->[OH^-][Partial hydrolysis] B ->[NaOH + Br2] C}\]

Identify compounds A, B and C in the following sequence of reaction.

\[\ce{CH3NH2 ->[CH3Br] A ->[CH3COCl] B ->[B2H6] C}\]

Identify compounds A, B and C in the following sequence of reaction.

Identify compounds A, B and C in the following sequence of reaction.

\[\ce{CH3CH2NC ->[HgO] A ->[H2O] B ->[i) NaNO2/HCl][ii) H2O] C}\]

Complete the following reaction.

Predict A, B, C and D for the following reaction.

Account for the following.

Aniline does not undergo Friedel-Crafts reaction.

Write short note on:

Ammonolysis

What is metamerism? Give the structure and IUPAC name of metamers of 2-methoxy propane.

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