141⟩ What is the lattice energy of Nacl?
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237 Bio Chemistry Questions And Answers
142⟩ Define first law of Faraday
The amount of substance liberated, dissolved, or deposited at an electrode is directly proportional to the quantity of electricity passed through the electrolyte.
143⟩ What is racemic mixture? Why it is optically inactive?
Optical Isomers of a substance that are mirror images of each other are called Enantiomers (or) Enantimorphs. Ex: d and L – Lactic acid
Optical Isomers of a substance that are not mirror images of each other are called Diastereomers. Ex: d-Tartaric and meso –Tartaric acids
144⟩ What is Isomerism?
Compounds with same molecular formula but different properties are called Isomers and the phenomenon is called Isomerism.
145⟩ How can we calculate the number of possible optical Isomers for a given Compound?
2n-Where n is the number of asymmetric carbon atoms.
146⟩ What is optical Isomerism? Which compounds exhibit optical Isomerism?
Isomers, which differ in the rotation of the plane polarized light, are called Optical Isomerism.
147⟩ What does Hess law states?
Hess law states that the heat of reaction is same whether the reaction takes place in one or several states. Therefore Q=Q1+Q2+Q3+…
148⟩ What is function group?
An atom or group of atoms, which determine the characteristic properties of the Substance it, is called functional group.
149⟩ To calculate the e.m.f of the cell when does the nelsons equation is use?
The Nernst equation is useful to calculate the e.m.f of the cell when the concentrations of solution are different from unity.
150⟩ Define the Phenomenon catenation. Which element has maximum Catenation ability?
Carbon has maximum catenation ability. The self-linkage of the atoms of elements to produce long chains is called catenation.
151⟩ Name the first synthetic organic compound. Who proposed it and from which compound?
The first synthetic organic compound is Urea.
It was prepared by Wohler from ammonium cynate.
NH4CNO……………………NH2-CO-NH2
152⟩ In some reactions, Rate of reaction is directly proportional to.
Concentration of catalyst
153⟩ Which equation gives the relation between specific rate (k) and Temperature?
Arrhenius equation K = Ae-E a / R T
154⟩ Catalyst used in Bio-Chemical reactions is called.
Enzymes
155⟩ Reactions catalyzed by light are called as.
Photo catalyzed or Photosensitised reactions
156⟩ Define order of reaction
The order of reaction is the number of moles whose concentrations determine the rate of a reaction at a given temperature
157⟩ Give the integrated equation for first order reaction.
K = (2.303 / t) * log (a / a-x)
158⟩ Rate equation of first order reaction is.
dx/dt = K * (a-x)
where ‘a’ is the initial concentration of reactants
‘x’ is the amount reacted in time t seconds
159⟩ What is activation energy?
The difference between Threshold energy and average energy of the molecules is called activation energy.
160⟩ Ina chemical reaction lowers the rate of reaction the greater will be.
The activation energy
