Name the receptors respond to irritants such as ammonia, vinegar or hot chilly pepper.

a) Name the receptors of smell found as mucous coated thin, yellowish patch of modified pseudo stratified epithelium. b) Where is these receptors located?

An aromatic compound on treatment with aqueous ammonia and heating forms compound 'B' which on heating with 'Br_2' and 'KOH' forms a còmpound of molecular formula 'C6 H7N'. Write the structures and IUPAC names of compounds 'A, B' and 'C'.

Name the catalyst used in i) the oxidation of ammonia to nitric acid by Ostwald'process. ii) the synthesis of ammonia by Haber process.

When sodium borohydride (NaBH_4) is treated with iodine (l_2) , two gaseous products were obtained. One is hydrogen and the other is a highly toxic gas X, which catches fire upon exposure to air. When the gas X is heated with ammonia for a long time, a compound Y of ring structure is ob tained. Identify X and Y. (Name and molecular formula are expected)

The touch receptors are either free dendritic endings or encapsulated dendritic endings present in the skin. a) What are the main functions of receptors of free dendritic endings ? b) Name the main receptors of encapsulated dendritic endings. Give its functions.

The tissues of eye and ear contain photoreceptors and the auditory receptors. Likewise some are found as film of liquid coating in the membranes of the receptor cells. Name it.

Assertion: The decomposition of gaseous ammonia on a hot platinum surface is a zero order reaction at high pressure. Reason: For a zero order reaction, the rate of reaction is independent of initial concentration.