General Chemistry Assessment for Engineering Entrance

This option is correct because when a solvent with lower concentration is added into a cell, the cell usually swells up because the solvent molecules enter the cell gap through the cell wall from the solution of lower concentration.

This option is correct because the oxidation of the reaction of methyl ketones with halogen, in the presence of an alkali, gives haloform. Hence, 2-pantanone gives the iodoform test.

This option is correct because cystein is an amino acid.which contains the thiol group along the side chain. This group participates in the enzymatic reaction and behaves as a nucleophile.

This option is correct because sulphur dioxide liquid has a high latent heat of vapourisation and hence, is used as a refrigerating agent. 

This option is correct because aziridine is a three-membraned heterocyclic compound and this compound is less basic than acyclic aliphatic amine.

This option is correct because when liquid acetic acid is mixed with ethanol and a drop of concentrated sulphuric acid, it forms ethyl acetate which emits a fruity odour.

This option is correct because cyclohexane is mainly used for the industrial production of adipic acid and caprolactam which are the precursors of nylon.

This option is correct because when para-nitroso N,N dimethyl amine is decomposed with caustic soda, it forms dimethyl amine and para-nitrosophenol.

This option is correct because bioten is also called Vitamins H or coenzyme R. It is composed of ureido biotin and is necessary for cell growth and the production of fatty acid as well as the metabolism of fats and amino acid.

This option is correct because when calcium phosphate is heated with concentrated H₂SO₄, it forms a mixture of primary phosphates of calcium and gypsum. Hence, it is called the superphosphate of lime.

This option is correct because the isomer containing two caffice acid molecules is called the isochlorogenic acid. It can be found in coffee.

This option is correct because when urea reacts with hydrazine at 100⁰C, semicarbazide is formed.

This option is correct because niacin is called as vitamins B₃ or nicotinic acid.

This option is correct because glucose is added in monolignol to make it water soluble and reduce its toxicity.

This option is correct because these silicate compounds are simple silicates, which contain discrete SiO₄^-4 tetrahedral unit. SiO_4^-4 tetrahedral do not share an oxygen atom with another. Hence, both the units of the silicates are matched to the ortho silicates.