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Abhay TiwariBegginer

Asked: April 20, 2023In: Chemistry

The Correct statement about freons is A. They are used as a cancer medicine B. They are chlorofluorocarbon compounds C. These are toxic organic compounds D. These are flammable compounds

Freons are Chlorofluorocarbon compounds that contain only carbon, chlorine, and fluorine.

Abhay TiwariBegginer

Asked: April 21, 2023In: Chemistry

A metal M readily forms its sulphate MS04which is water soluble. It forms its oxide MO which becomes inert on heating. It forms an insoluble hydroxide M(OH)2 which is soluble in NaOH solution. Then M is (1)Mg 2) Ba 3) Ca 4) Be

Beryllium shows anomalous properties with alkaline earth metals, due to its small size.

Abhay TiwariBegginer

Asked: April 21, 2023In: Chemistry

The substance not likely to contain CaC03 is (1)calcined gypsum 2) sea shells 3) Dolomite 4) Marble statue

The composition of gypsum is CaS04. 2H20, while others are carbonates.

Abhay TiwariBegginer

Asked: April 21, 2023In: Chemistry

The ionic mobility of alkali metal ions in aqueous solution is maximum for 1) K+ 2) Rb+ 3) Li+ 4) Na+

For 1st group, the order for mobility is Rb+>K+>Na+>Li+ Ionic mobility is inversely proportional to hydration enthalpy. Further hydration enthalpy is inversely proportional to size of the ion. Hence ionic mobility is maximum for Rubidium ion.

Abhay TiwariBegginer

Asked: April 20, 2023In: Chemistry

How many of the given compound gives a positive Biuret test ? Glycine, Glycylalanine, Tripeptide, Biuret.

Only the compounds containing peptide bonds gives positive biuret test. Only two compounds Glycylalanine( contains a peptide bond between two amino acid ) and tripeptide( contains two peptide bonds between three amino acids ) gives positive Biuret test. Therefore 2 compounds gives ...Read more