List of top Chemical Technology Questions asked in GATE CH

In the CONTACT PROCESS for manufacturing sulphuric acid, the reaction converting \( {SO}_2 \) to \( {SO}_3 \) is
In the production of polyvinyl chloride (PVC) from ethylene and chlorine, the sequential order of reactions is
The capital cost (CC) of an industrial equipment varies with its capacity (S) as \( CC \propto S^\beta \). The rule-of-thumb value of the exponent \( \beta \) is

To manufacture paper from ______(i) _______, the ________ (ii) _______ must be freed from the binding matrix of ________(iii) ________ in the pulping step. Which one of the following is the CORRECT option to fill in the gaps (i), (ii) and (iii)?

Methane combusts with air in a furnace as \( \text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O} \). The heat of reaction \( \Delta H_\text{r} = -880 \, \text{kJ/mol CH}_4 \), and is assumed to be constant. The furnace is well-insulated, and no other side reactions occur. All components behave as ideal gases with a constant molar heat capacity \( c_p = 40 \, \text{J mol}^{-1} \, \text{°C}^{-1} \). Air may be considered as 20 mol\% \( \text{O}_2 \) and 80 mol\% \( \text{N}_2 \). The air-fuel mixture enters the furnace at \( 50 \, \text{°C} \). The methane conversion \( X \) varies with the air-to-methane mole ratio, \( r \), as: \[ X = 1 - 0.1e^{-2(r-r_s)}, \, \text{with} \, 0.9r_s \leq r \leq 1.3r_s, \] where \( r_s \) is the stoichiometric air-to-methane mole ratio. For \( r = 1.05r_s \), the exit flue gas temperature in \( \, \text{°C} \), rounded off to 1 decimal place, is:
Two parallel first-order liquid phase reactions \( A \xrightarrow{k_1} B \) and \( A \xrightarrow{k_2} C \) are carried out in a well-mixed isothermal batch reactor. The initial concentration of \( A \) in the reactor is \( 1 \, \text{kmol} \, \text{m}^{-3} \), while that of \( B \) and \( C \) is zero. After \( 2 \, \text{hours} \), the concentration of \( A \) reduces to half its initial value, and the concentration of \( B \) is twice that of \( C \). The rate constants \( k_1 \) and \( k_2 \), in \( \text{h}^{-1} \), are respectively:
The rate of a reaction \( A \rightarrow B \) is \( 0.2 \, \text{mol} \, \text{m}^{-3} \, \text{s}^{-1} \) at a particular concentration \( C_{A1} \). The rate constant of the reaction at a given temperature is \( 0.1 \, \text{m}^3 \, \text{mol}^{-1} \, \text{s}^{-1} \). If the reactant concentration is increased to \( 10 \, C_{A1} \) at the same temperature, the reaction rate, in \( \text{mol} \, \text{m}^{-3} \, \text{s}^{-1} \), is:
The ratio of the activation energy of a chemical reaction to the universal gas constant is \( 1000 \, \text{K} \). The temperature dependence of the reaction rate constant follows the collision theory. The ratio of the rate constant at \( 600 \, \text{K} \) to that at \( 400 \, \text{K} \) is:
Which of the following statements with reference to the petroleum/petrochemical industry is/are correct?
In an ammonia manufacturing facility, the necessary hydrogen is generated from methane. The facility consists of the following process units - P: Methanator, Q: CO shift convertor, R: CO2 stripper, S: Reformer, T: Ammonia convertor The correct order of these units, starting from methane feed is
Which are true for Petroleum / Petrochemicals?