Organic Chemistry Answers

Stereoisomerism and different type that exist I.e. (geometry and optical) give simple and naturally occurring examples of each type of illustration your explanation, including structural formula and photograph of 3d Models of stereoisomerism

The enthalpy of formation of NH3(g) as per the following reaction is -46.11 kJ/mol at 298 K.

N₂(g) + 3H₂(g) 2 NH3(g)

Calculate the value of enthalpy of formation of NH3(g) at 100 °C. The Co (JK mol) values are given as: N₂(g) 29.12; H2(g) = 28.82; NH3(g) = 35.06. Assume the given heat capacity values to be temperature independent in the range.

a. A 25 cm³ sample of an aqueous solution of barium hydroxide, of concentration 0.146 mol dm³ was exactly neutralized by 28.7cm³ of aqueous nitric acid, according to the unbalanced equation:

Ba (OH)_2 (aq) + HNO_3(aq) ˗˗˗˗˗˗˗˗˃ Ba(NO₃)_2 (aq) + H₂O _(l)

i. Calculate the amount of nitric acid in terms molarity and in terms of number of moles 

ii. Differentiate molarity and number of moles.

a. The equilibrium constant K_c of the reaction: H_2 (g) + I_2 (g)  ˂˂˂˗˗˗˗˗˗˗˃˃˃˃  HI _(g) is 54.3 at 430 ^oC. Starting with 6.0 moles of HI in a 1.0 dm^-3 reaction vessel.

i. Calculate the concentrations of H_2 (g), I_2 (g) and HI _(g) at equilibrium.

ii. If H₂ (g) is added  to the reaction vessel to increase its concentration to 2.0 M, determine the reaction quotient Q, then calculate the concentration of all the gases when the new equilibrium is re-established.

 What is the [A-] when 50 ml of 0.1 M NaOH is added to the 100 ml solution mixture which is in 0.1 M HCl and 0.1 M acetic acid? (Ka =1.75*10-5)

Type of electronic transition

observed in following compounds (a)

->C-X (b) >C=O

Which of the following are constituent polysaccharides of starch?

A) amylose & amylopectin

B) glycogen

C) cellulose & amylopectin

D) amylose & glycogen

Which of the following glycosidic bonds are present in the least branched component of starch?

A) 1a-6

B) 18-4

C) 1a-2B

D) 1a-4

How many chiral carbons are in fructofuranose?

A) 2

B) 3

C) 4

D) 5

Finish the reaction: C,H,OH+PC (Conditions for nucleophic substitution are optima)

A) CH,CH+H,PO

B) CH,CH+H₂PO₂

C) C₂H₂C+PCI+H₂O

D) C₂H₂CH+POCI