List of top Questions asked in AP PGECET- 2026

There is strong pore resistance, when the Thiele Modulus is ______

The dimensions of the rate constant for reaction 2A $\to$ B are litre/ (mol.min), the order of the reaction is ______

The McCabe-Thiele method for distillation is valid, when______

The term knuckle radius, is associated with ______

For the isothermal gas-phase reaction A $\to$ 3B, the fractional change in volume of the system between no conversion and complete conversion is ______

In an absorption column, the gas enters at y$_1$ = 0.10 and exits at y$_2$ = 0.01. The solvent enters pure (x$_2$ = 0). Using a liquid-gas ratio (L/G) of 2, the exit liquid mole fraction x$_1$ is:

In liquid-liquid extraction, the distribution coefficient D is defined as:

In adsorption, the Langmuir isotherm assumes:

Heat energy required to increase the temperature of unit mass of gas and its accompanying vapour by one degree at constant pressure is known as______

Moisture contained by a substance in excess of equilibrium moisture is called______

Milk powder is made from milk by drying in a:

The temperature at which a vapor-gas mixture becomes saturated when cooled at constant total pressure out of contact with a liquid is called:

In a binary gas mixture at low pressures, the diffusion coefficient is ______

The diffusivity of A in B is 2x10$^{-5}$ m$^2$/s. For a stagnant film of thickness 2mm with C$_{A1}$ = 0.05 mol/m$^3$ and C$_{A2}$ = 0.01 mol/m$^3$, the molar flux is ______

According to penetration theory, the mass transfer coefficient is proportional to______

Psychrometric ratio for air-water mixture over the temperature usually come across is approximately______

For condensation of a pure vapor on a vertical surface, the Nusselt theory predicts:

The heat flux (from outside to inside) across an insulating wall with thermal conductivity k = 0.04 W/m K and thickness 0.16m is 10 W/ m$^2$. The temperature of the inside wall is -5$^\circ$C. The outside wall temperature is______ $^\circ$C.

The hydrodynamic and thermal boundary layer will merge, when______

Prandtl number is the ratio of ______

The thermal conductivity is minimum for ______

Which of the following dimensionless number is associated with free convection?

Wavelength corresponding to the maximum energy is inversely proportional to the absolute temperature is known as ______

In a counter-current heat exchanger, compared to co-current flow:

In natural convection, the driving force for fluid motion is: