Organic Chemistry Answers

200 mL of water sample has hardness equivalent to 25 mL of 0.08 N MgSO4. What is the hardness of the sample?

Give the IUPAC names of the following compounds: (2)
(i)
CH3CHCHCH3
CN
CH3

(ii) CH3CH2OCH2CHCH3
CH3
b) Explain the type of hybridisation present in ethyne using suitable diagrams. (3)
2. Explain asymmetric synthesis using suitable examples. (5)
3. Draw and explain the energy profile associated with ring flipping of chair conformation
of cyclohexane.
(5)
4. Give reasons for the following: (2+2+1)
(i) 2, 2-Dimethylpropane has higher melting point than pentane.
(ii) -carotene is red in color.
(iii) The region of IR spectrum between 675 cm1
and 1250 cm1
is called fingerprint
region.
5. What is tautomerism? How is it different from resonance?

which ions are present in an aqueous solution of iron(ii) tetraoxosulphate(vi)

Calculate the potential for the following redox reaction:
2Fe3+(aq) + Sn2+(aq) ↔ Sn4+(aq) + 2Fe2+(aq)
for a solution in which [Fe3+] = 0.050 M, [Fe2+] = 0.030 M, [Sn2+] = 0.015 M and
[Sn4+] = 0.020 M. Fe3+/ Fe2+ = 0.771 V; Sn4+/ Sn2+ = 0.154 V.
Also show the balanced oxidation and reduction half‐reactions.

Explain why the following names are never used in the IUPAC system
(I) 1,3-dimethylpropane (ii) 2-ethylhexane
(iii) 3-isopropylpentane (iv) 1,3,5-trimethylpentane

Comapre and explain the basicities of ammonia, ethylamine and phenylamine

Calculate pI for the titration of 50.0 mL of 0.0250 M KI after adding 25.0 ml of
0.0500 M AgNO3.

A tank of O2 used at home for a patient with pulmonary disease has a pressure of 220mmhg 2.0 moles of gas and a volume of 4.0l. What will the pressure be when the volume expands to 5.0L and 3.0 moles of O2 is added when the temperature does not change

Calculate the mass of cucl2 that would be require to obtain 10.0g of pure copper

Which transition metals are paramagnetic but can easily form ferromagnetic alloys with other metals?