This option is correct because the para-nitrophenol contains the electron withdrawing group at para position of the phenolic compound. Therefore, it incereases the acidity of the compound of phenol.

This option is correct because it is derived from the olive oil. It contains the 18-carbon atom which adjusts carbon to the carbon double bond and hence, it is known as an unsaturated fatty acid. The formula is CH₃(CH₂)₇HC=CH(CH₂)₇COOH.

This option is correct because when the plaster of paris are heated above 200⁰C the water molecule are lose and its converted in to anhydrous salt. these salt are called as dead burnt

This option is correct because the sodium carbonate are added in sodium hexametaphosphate to raise the pH. It acts as the breakdown of clay which settles down at the bottom of the surface and hard water changes into soft water.

This option is correct because when dilute nitric acid added with zinc metal, ammonium nitrate is produced.

This option is correct because acetonitriles, on hydrolysis, produce acetic acid and evolve ammonia.

This option is correct because the treatment with conc. nitric acid, in certain protein, gives yellow colure. This yellow colour is the same as that formed on the skin.

This option is correct because lithium nitrate decomposes on heating, producing NO₂ whereas other alkali nitrate produced the nitrite and oxygen on decomposition.

This option is correct.

This option is correct because CH₃CONH₂ react with sodium metal to produce hydrogen.

This option is correct because the potassium cobaltonitrite are treated acetic acid in presence of air to formed the potassium cobaltenitrite K₃[Co(NO₂)₆],this salt is called as fischer salt.it is the yellow colored crystals

This option is correct because the white phosphorus is manufactured from the calcium phosphate by modern electrothermic process. A mixture of phosphorite or bone ash, silica and coke in electric furnace, at about 1500⁰C, the vapour of phosphorus are taken for cold water condensation as a form of white phosphorus.

This option is correct because a fraction of middle oil contains mainly phenol. Naphthalene crystallises out upon cooling. It is purified by sublimation and used for the manufactured of dyes, drugs, etc.

This option is correct because when stannous chloride reacts with ammonium chloride to produce ammonium chlorostannate, they are the derivatives of pink salt. It is used in mordent in dyeing agent.

This option is correct because BF₃ acts as a Lewis acid. The boron in BF₃ is electron poor and has an empty orbital, so it can accept a pair of electrons, making it a Lewis acid.