List of top Questions asked in TS PGECET- 2026

A reaction in which one of the products of the reaction acts as a catalyst is called:

The gas phase reaction \( \text{A} \rightarrow \text{B} + \text{C} \) is carried out in an ideal PFR achieving 40% conversion of A. The feed has 70 mole % A and 30% inerts. The inlet temperature is 300 K and the outlet temperature is 400 K. The ratio of the outlet to inlet molar concentration of A (assuming ideal gas mixture and uniform pressure) is:

In solid catalysed reactions, the diffusional effects are more likely to affect the overall rate of reaction for:

A pulse tracer is introduced in an ideal CSTR (with a mean residence time T) at time = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be:

The E-curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt:

The catalyst in a second order reversible reaction increases the rate of the:

The unit of frequency factor in Arrhenius equation is:

For Arrhenius model of the rate constant \( k = k_0 \cdot e^{-E/RT} \), the graph drawn between \( \ln(k) \) versus \( \frac{1}{T} \) gives the slope of:

Which one of the following fixes the volume of batch reactor for a particular conversion and production rate?

For a highly exothermic, solid-catalysed reaction, what reactor configuration should be used to achieve high conversion?

A space time of 3 hours for a flow reactor means that:

For all positive reaction orders and for a given reactor duty:

In an inter-phase mass transfer process, the lesser the solubility of a given solute in a liquid, the higher are the chances that the transfer process will be:

In an absorber the equilibrium curve is always:

The individual mass transfer coefficients (\(\text{mol}/\text{m}^2\cdot\text{s}\)) for absorption of a solute from a gas mixture into a liquid solvent are \( k_L = 4.5 \) and \( k_G = 1.5 \). The slope of the equilibrium line is 3. Which one of the following resistance(s) is/are controlling?

The molecular diffusivity of a liquid:

In binary distillation, the number of bubble cap per tray primarily depends on:

In distillation column design, the McCabe-Thiele procedure is inadequate and Ponchon-Savarit procedure is needed when:

Which one of the following tray gives greatest flexibility in distillation column?

The dew point of an unsaturated mixture of water vapour and air at constant temperature and pressure:

An azeotropic mixture of two liquids has boiling point higher than either of them when it:

If there is condensation of carrier steam in the steam distillation of high-boiling organic materials, then:

The reason for referring packed towers over plate towers in distillation practice is that the packed tower operation gives:

The Sieder-Tate correlation for heat transfer in turbulent flow in a pipe gives \( \text{Nu} \propto \text{Re}^{0.8} \), where \( \text{Nu} \) is the Nusselt number and \( \text{Re} \) is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer coefficient varies with the pipe diameter (D) as:

Prandtl number in heat transfer is analogous to the following dimensionless number in mass transfer: