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

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.

Which one of the following is not produced by body?

Vitamin B₂ is also known as ____________.

Which of the following vitamins is water soluble?

Name the vitamin whose deficiency causes rickets.

Name the vitamin whose deficiency causes scurvy.

How are vitamins classified?

Account for the following.

Aniline does not undergo Friedel-Crafts reaction.