An organic compound A contains 69.77% carbon 11.63% hydrogen and rest oxygen. The molecular Mass of the compound is 86. It does not reduce Tollen’s reagent but forms an addition compound with sodium hydrogen sulphite and gives positive iodoform test. On vigorous Oxidation it gives ethanoic and propanoic acids. Derive the Possible structure of A.

A compound containing carbon, hydrogen and oxygen gave the following analytical data C= 40.0%, H= 6.67%. Calculate the molecular formula of the compound, If its molecular mass is 180.

An organic compound A with molecular formula C_8H_8O gives positive DNP and iodoform tests. It does not reduce Tollen’s or Fehling’s reagent and does not decolourise bromine water also. On oxidation with chromic acid (H_2CrO_4) , it gives a carboxy acid (B) with molecular formula C_7H_6O_2 . Deduce the structure of A and B.

An organic substance containing carbon, hydrogen and oxygen gave following percentages, C= 40.68%, H_(2) = 5.085% and O_(2) = 54.22%. The vapour density of the compound is 59. Calculate the molecular formula of the compound.

A certain non-volatile electrolyte contain 40% carbon, 6.7% hydrogen and 53.3% oxygen.An aqueous solution containing 5% by mass of the solute boils at 100.15^(@) C. Determine molecular formula of the compound( K_(b) =0.51^(@)C//m ):

Phosphorus forms a variety of oxyacids. In all these, phosphorus is sp^3 hybridised and is tetrahedrally bonded to four neighbouring atoms. These contain P-OH bonds, the hydrogen of which are ionisable giving acidic character to these compounds. These also contain P-H bonds in which hydrogens are notionisable because P and H have nearly same electronegativity. The presence of P-H group in these oxyacids is responsible for their reducing properties. The structures of some oxyacids are given below : Answer the following (1 to 7) questions : The oxyacid of P having tetrabasicity is