121⟩ What does Thermodynamics helps in predicting?
Predicting the feasibility of reaction and does not indicate the rate of chemical reaction
Bio Chemistry
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237 Bio Chemistry Questions And Answers
122⟩ Name the best indicator
Phenolphthalein, PH range 8.3 to 10.0
123⟩ PH of buffer solution is calculated by.
Henderson’s equation
124⟩ Chemical kinetics deals with study of.
Rates and mechanisms of chemical and Biochemical reactions
125⟩ Which is element exhibit allotrope in the 6thA group?
Sulphur
126⟩ Sulphur molecule exists as.
S8 molecule (octa atomic)
127⟩ What does the expression –dc/dt indicates?
Rate of reaction can be expressed as –dc/dt where dc is small decreasing concentration in time dt seconds, (-) sign indicates that the concentration decreases with time.
128⟩ For every 10 degrees rise of temperature, the rate of reaction is generally.
Doubled
129⟩ How can you determine the reaction, taking place at constant pressure delta (H)?
The difference of Enthalpy’s of products and reactants H=Hp-Hr
130⟩ Define standard feat of formation
The amount of heat liberated of absorbed when one mole of compound is formed in its standard state from its elements in their standard state is called standard heat of formation ( Hf *)
131⟩ What is Internal energy?
Every substance poses definite amount of energy called internal energy or intrinsic energy (E).
132⟩ Define heat of Combustion
The amount of heat liberated when one mole of any substance is completely burnt in oxygen is called heat of combustion H is negative for heat of combustion.
133⟩ The expression q=delta (E)-W is? What does it states?
1st law of thermodynamics may be represented as q= E-W
According to this law the energy can neither be created nor destroyed, but can be converted into one form to another.
134⟩ What is Kc?
Kc is the equilibrium constants when the concentrations are expressed in moles/litre
Kc = product of concentrate ions of products / product of concentrate ions of reactants
135⟩ What is Galvanic cell?
A Galvanic cell or voltaic cell or electrochemical cell is a system in which a spontaneous chemical oxidation- reduction occurs and generates electrical energy.
136⟩ Which electrode acts as reference electrode and gives its potential value?
Standard hydrogen electrode was taken as reference electrode whose potential is assumed zero.
137⟩ Nelsons equation for any cell reaction is given by.
E = Eo + (2.303RT /nF) log [Oxidation form]/[reduced form]
138⟩ How can you determine the dissociation constants of electrolyte?
The strength of the Electrolyte
139⟩ In electronic conductors, what is the reason for flow of current?
Reason for flow of current is that moment of free electrons from higher negative potential to a lower positive potential region.
140⟩ Which branch of science deals with the transformation of chemical energy into electrical energy and vice versa?
Electrochemistry
