Organic Chemistry Answers

The vapour density of an organic compound is 40.if the organic compound contains 20.5% of carbon, 3.1% of hydrogen, 14.5% of nitrogen and the rest is oxygen.

Calculate;

(1) its empirical formula.

(2) its molecular formula.

(3) Name the organic compound.

(4) State five uses of the compound.

(5) State the products of the reaction of the compound.

Give a specific example of a protein that has all the levels of protein structure (primary, secondary, tertiary, and quaternary)

A radioisotope has an initial activity of 5 millicurie. 48hours later the observed activity is 4 millicurie. Determine

a) the half-life of the radioisotope

b) the initial number of nuclides in the radioisotope

What is the Structural formula of [Ni(NH3)6]2+?

Explain structural isomerism and the different types that exist (i.e. chain, positional and functional group). Give at least two examples of each type, including structural formulae and photographs of 3D models to illustrate more clearly what structural isomerism is. Compare different structural isomers which have the same molecular formula, considering the difference in physical or chemical properties.

Construct and analyse an example of each of the following reaction mechanism types:

• Addition e.g. aldehyde or ketone with HCN

• Substitution e.g. halogenoalkane with ethanolic NaOH

• Addition-elimination e.g. aldehyde or ketone with 2,4-dintriophenylhydrazine

This section must explore and interpret the similarities and differences between each of the four mechanisms.

nitrogen is contained in which class of organic groups

2ClO₃^- + N₂+ 2H₂ON₂H₄ + 2ClO₄^-

In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent.

CH3CH3CH3CH3BR-i)kcnii)h2o+h+ gives

A conductivity cell having a cell constant of 0.5 cm–1

 filled with 0.02 M solution of KCl at 

298 K gave a resistance of 20.2 Ω. The water used for preparing the solution had a conductivity 

of 7.1 × 10–6 S cm–1. Calculate the molar conductivity of 0.02 M KCl solution