An organic compound contains 69% carbon and 4.8% hydrogen, the remainder being oxygen. Calculate the masses of carbon dioxide and water produced when 0.20 g of this substance is subjected to complete combustion.

Explain why \({ \left( { CH }_{ 3 } \right) }_{ 3 }\overset { + }{ C } \) is more stable than \({ CH }_{ 3 }\overset { + }{ C } { H }_{ 2 }\) and \(\overset { + }{ C } { H }_{ 3 }\)is the least stable cation.

Sohan was very upset from last few days when he came to know that his father is alcoholic (takes alcohol).He knows about the side effects of the alcohol so want to keep away his father from it.He decided to talk about this with his father.When he asked his father about it, he told him, that he is not alcoholic, only occasionally he takes it but of Sohan does not even want him to ever touch it.
(a) What is the main constituent of alcoholic beverages?
(b) Write the IUPAC name and hybridization of this main constituent.
(c) What are the side effects of alcoholic beverages?
(d) What values are possessed by Sohan and his father?

Discuss the principle of estimation of halogens, sulphur and phosphorus present in an organic compound.

0.50 g of an organic compound was Kjeldahlished. The ammonia evolved was passed in 50cm³ of 1N H₂SO₄ . The residual acid required 60 cm³ of N/2 NaOH solution. Calculate the percentage of nitrogen in the compound.

Explain hyperconjugation effect. How does hyperconjugation effect explain the stability of alkenes?

(a) Wfult is the basic principle involved in the estimation of nitrogen by Dumas method.
(b) In a Dumas nitrogen estimation method, 0.30 g of an organic compound gave 50 cm³ of N₂ collected at 300 K and 715 mm Hg pressure. Calculate the percentage composition of nitrogen in the compound. (Vapour pressure of water at 300 K is 15 mm Hg)

(a) What is Lassaigne's extract? Will NaCN give a positive Lassaigne's test for nitrogen?
(b) Which colour will appear in the Lassaigne's test if the compound contains both nitrogen and sulphur.
(c) Why is Lassaigne's extract prepared in distilled water? Can we detect oxygen in a compound by Lassaigne's test?