Coordination Compounds — Chemistry STD 12 Science — Question

A compound ‘X’ (C₂H₄O) on oxidation gives ‘Y’ (C₂H₄O₂). ‘X’ undergoes haloform reaction. On treatment with HCN ‘X’ forms a product ‘Z’ which on hydrolysis gives 2-hydroxy propanoic acid.

1. Write down structures of ‘X’ and ‘Y’.
2. Name the product when ‘X’ reacts with dil. NaOH.
3. Write down the equations for the reactions involved.

What is cell potential and emf? Explain representation of galvanic cell with examples?

An organic compound ‘A’ with molecular formula C₅H₈O₂ is reduced to n pentane on treatment with Zn–Hg/ HCl. ‘A’ forms a dioxime with hydroxylamine and gives a positive lodoform test and Tollens’ test. Identify the compound A and deduce its structure.

Write note on lead storage cell.

How does acetone reacts with HCN and NaHSO₃?

Give reasons for the following:

1. The transition metals generally form coloured compounds.
2. E^o value for (Mn³⁺|Mn²⁺) is highly positive than that for (Cr³⁺|Cr²⁺) couple.
3. The chemistry of actinoids elements is not so smooth as that of the lanthanoids.

Explain molecular asymmetry, chirality and enantiomers.

The electrical resistance of a column of 0.05M NaOH solution of diameter 1 cm and length 50 cm is 5.55 x 10³ ohm. Calculate its resistivity, conductivity and molar conductivity.

How does sprinkling of salt help in clearing the snow covered roads in hilly areas? Explain the phenomenon involved in the process.