List of top Basic Engineering and Science Questions asked in Tamil Nadu Common Entrance Test

What is the Knudsen diffusion coefficient for cumene at 510°C through the pores of a catalyst of porosity 0.51 and density 1.14 g/cm³? The specific surface area is 342 m²/g.
Catalyst pellets have a density of 2.0 g/c(C) If the specific surface area is 75 m²/g and the average pore diameter is \( 8 \times 10^{-7} \) cm, what is the porosity of the catalyst?
A reaction \( A \to B \) is to be conducted in two CSTRs in series. The steady-state conversion desired is \( X_f \). The reaction rate as a function of conversion is given by \( r = -\frac{1}{1 + X} \). If the feed contains no B, then the conversion in the first reactor that minimizes the total volume of the two reactors is

What mass of 75% pure CaCO3 will be required to neutralize 50 ml of 0.5M HCL solution according to the following reaction? \[ {CaCO}_3 + 2{HCl} \to {CaCl}_2 + {CO}_2 + {H}_2{O} \]

What is the Knudsen diffusion coefficient for cumene at 510°C through the pores of a catalyst of porosity 0.51 and density 1.14 g/cm³? The specific surface area is 342 m²/g.
Catalyst pellets have a density of 2.0 g/c(C) If the specific surface area is 75 m²/g and the average pore diameter is \( 8 \times 10^{-7} \) cm, what is the porosity of the catalyst?
A reaction \( A \to B \) is to be conducted in two CSTRs in series. The steady-state conversion desired is \( X_f \). The reaction rate as a function of conversion is given by \( r = -\frac{1}{1 + X} \). If the feed contains no B, then the conversion in the first reactor that minimizes the total volume of the two reactors is

A gaseous reaction \( A \to 2B + C \) takes place isothermally in a constant pressure reactor. Starting with a gaseous mixture containing 50% A (rest inerts), the ratio of final to initial volume is found to be 1.6. The percentage conversion of A is

Assuming that CO2 obeys the perfect gas law, the density of CO2 in kg/m\(^3\) at 536 K and 202.6 kPa is
The change in the Gibbs free energy for the vaporization of a pure substance is

In the process of producing caustic (NaOH), 4000 kg/h of a solution containing 10 wt% NaOH is evaporated in the first evaporator, giving a 20% NaOH solution. This is then fed into a second evaporator which gives a product of 50% NaOH. The amount of water removed from each evaporator is

What is the heat capacity of Na2SO4.10H2O at room temperature using Kopp’s rule?

What mass of 75% pure CaCO3 will be required to neutralize 50 ml of 0.5M HCL solution according to the following reaction? \[ {CaCO}_3 + 2{HCl} \to {CaCl}_2 + {CO}_2 + {H}_2{O} \]

CaCO3 contains ________ of Calcium. 
 

What is the temperature at which °C is equal to °F?
Aniline point test of an oil qualitatively indicates
A typical example of an exothermic reversible reaction conducted at high pressures in industry is
An arbitrary scale used in sugar industry is

Match the technologies in Group 1 with the entries in Group 2:

Group 1Group 2
(P) Urea manufacture(I) Microencapsulation
(Q) Coal gasification(II) Ultra-low sulphur diesel
(R) Controlled release of chemicals(III) Shale oil
(S) Deep hydro-desulphurization(IV) Prilling tower
 (V) Gas hydrates
 (VI) Gas – solid non-catalytic reaction
The Value of Gibbs free energy change at equilibrium condition is

A generalized relation for crushing is \[ \frac{d(P)}{m} = -K \frac{dD}{D^n} \] The solution for this equation leads to Rittinger's law for 'n' equal to ______.

The unit of filter medium resistance is
Equivalent diameter of a particle is the diameter of the sphere having the same
Which of the following minerals is not subjected to magnetic separation method?

Which of the following statements are CORRECT?