10th Maths||vvi important formula for bihar board||Chapter 1 to 4 All formula||BSEB||CBSE||All board

Write structural formula for all the isomeric alcohols having the molecular formula C_(4)H_(10)O .

Draw the polygon formulae for all the possible structural isomers having the molecular formula C_(5)H_(10) .

Write the structural formula of a compound of molecular formula C_(4)H_(8)Cl_(2) in which (a) all the carbon atoms are involved in -CH_(2) groups (b) none of the carbon atoms is involved in -CH_(2) group.

A compound containing Ca,C,N and S was subjected to quantitative analysis and formula mass determination. A 0.25 g of this compound was mixed with Na_(2)CO_(3) to convert all Ca into 0.16 " "g " "CaCO_(3^(.) A 0.115 g sample of compound was carried through a series of reaction until all its S was changed into SO_(4)^(-2) and precipitated as 0.344 g of BaSO_(4). A 0.712 g sample was processed to liberate all of its N as NH_(3) and 0.155 g NH_(3) was obtained. The formula mass was found to be 156 . Determine the empirical and molecular formula of the compound :

An organic compound contains carbon, hydrogen and oxygen. If the ratio percentage of C and H is 6:1 calculate the simplest formula of the compound, given that one molecule of the compound contains half as much oxygen as would be required to burn all the carbon and hydrogen atoms in it to CO_2 and H_2O

Write all the possible isomers which can be obtained from the molecular formula C_4 H_10O .

An aromatic compound 'A' (Molecular formula C_(8)H_(8)O) ) gives positive 2, 4-DNP test. It gives a yellow precipitate of compound 'B' on treatment with iodine and sodium hydroxide solution. Compound 'A' does not give Tollen's or Fehling's test. On drastic oxidation with potassium permanganate, it forms a carboxylic acid 'C' (Molecular formula C_(7)H_(6)O_(2) ), which is also formed along with the yellow compound in the above reaction. Identify A, B and C and write all the reactions involved.