List of top Chemical, Thermal and Polymer Engineering Questions

Which of the following is used as an 'entrainer' in the separation of acetic acid-water mixture by distillation?
A multiple effect evaporator has a capacity to process 4000 kg of solid caustic soda per day when it is concentrating from 10% to 35% solids. The water evaporated in kg per day is:
For the function \(f(x) = 2x^3 - 15x^2 + 36x + 10\), the local maxima and local minima occur respectively at:
Sulfa drugs are derivatives of:
The eigen value corresponding to the eigen vector \(\begin{bmatrix} 1 \\ 2 \end{bmatrix}\) for the matrix \(\begin{bmatrix} 4 & 2 \\ 2 & 4 \end{bmatrix}\) is:
Consider separation of dust particles from gases in a cyclone separator. For a given particle size, the terminal velocity is maximum:
Mixed fertilizer having its grade designated by 5-25-10, means:
HDPE water storage tank is an example of:
Match the LIST-I with LIST-II:\[\begin{array}{|c|c|} \hline \textbf{LIST-I} & \textbf{LIST-II} \\ \hline \text{A. Gauss Seidel method} & \text{I. Interpolation} \\ \hline \text{B. Forward Newton method} & \text{II. Non-linear Differential equation} \\ \hline \text{C. Runge Kutta method} & \text{III. Numerical Integration} \\ \hline \text{D. Trapezoidal rule} & \text{IV. Linear algebraic equations} \\ \hline \end{array}\] Choose the correct answer from the options given below:
10 ml of 0.5 M HCl is mixed with 30 ml of 0.3 M HCl, the molarity of the solution is:
In the industrial production of nitric acid, oxidation of ammonia with air in the presence of 90% platinum, 10% rhodium catalyst in the converter constitutes the first step, the feed gas to the converter contains around:
For a typical project, the cumulative cash flow is zero at the:
A production equipment costs ₹200000. Its salvage value is ₹25000. The expected return is ₹50000 per annum. The corporate taxes are taken as 30%. The payback period will be:
As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches:
When the interest is compounded monthly, the effective interest rate will be:
ABS is a:
Consider the manufacturing of Linear Alkyl Benzene Sulphonates (LABS). The alkylbenzenes are sulphonated with:
The functionality of the Phenol in the preparation of phenol-formaldehyde resin is :
If the temperature of a saturated water is increased infinitesimally at constant entropy, the resulting state of water is:
Break-even point increases with:
Baffles are provided in heat exchangers to:
When a ball mill rotates at a speed higher than the critical speed, its efficiency is:
The best purpose served by the baffles used in agitated vessels is to:
Secondary nutrients in fertilizers are:
In petrochemical industry, any petroleum fraction having an approximate boiling point range between 20°C and 200°C which is used as a feed stock is called: