Recent questions

Which is/are the secondary air pollutant(s)?$\mathrm{O}_{3}$$\mathrm{HNO}_{3}$$\mathrm{CO}_{2}$$\mathrm{H}_{2} \mathrm{SO}_{4}$

The equipment that can be used to control particulate air pollution in an industrial unit is/areElectrostatic precipitatorcyclone separatorGravity settlerIncinerator

With respect to particle settling in wastewater treatment systems; the correct statement(s) is/areSettling in grit chamber and primary sedimentation tanks are examples of...

Consider second order kinetics $\left(r_{c}=-k C^{2}\right)$ under steady state condition. The ratio of volume of a complete mixed reactor (CMR) to that of a plug flow re...

A saturated $\mathrm{CaCO}_{3}$ stock solution is existing at $25^{\circ} \mathrm{C}$. In one experiment $\text{(i)}$ $25 \mathrm{~g}$ $\mathrm{Na}_{2} \mathrm{CO}_{3}$ i...

Which one is the solution $y(x)$ for the following ordinary differential equation and the specified boundary conditions?\[\frac{d^{2} y}{d x^{2}}-3 \frac{d y}{d x}+2 y=2 ...

A population $\text{(with mean $\mu$)}$ follows normal distribution. Ten samples $(N)$ are drawn at random with a mean value of " $x$ " and standard deviation of " $S$ "....

A Class-A pan was setup adjacent to a lake for measuring evaporation losses in the lake. The depth of water in the pan at the beginning of a certain week was $250 \mathrm...

A municipal solid waste digester generates $1000 \mathrm{~kg}$ of methane gas. The volume of the tank needed to store this gas at $30^{\circ} \mathrm{C}$ and 3 atmospheri...

Which of the following statement$\text{(s)}$ is/are CORRECT?DNA is composed of nucleotidesFive types of nitrogenous bases occur in DNAEach phosphate is attached to two de...

With reference to disinfection, which of the following statement(s) is/are CORRECT?Ethanol damages lipid structures in the bacterial cell membraneMercuric chloride inacti...

Enzymes with the class of enzymes are listed in the table.EnzymeClass of Enzyme$\text{(a)}$ Lactate dehydrogenase$\text{(i)}$ Isomerases$\text{(b)}$ Alanine racemase$\tex...

Consider the function $f(x)=\ln (\sin (x))$Expand $f(x+h)$ using Taylor's series. In this context, the correct statement(s) is/areSecond term in the Taylor's series i.e.,...

A gravity settling chamber of height ' $H$ ' and length ' $L$ ' is designed to control particulate air pollution. In the chamber, the horizontal velocity of air flow is '...

Consider two horizontal layers of an aquifer as shown in figure. Each layer is isotropic and homogeneous. Flow is parallel to the stratification. Thickness and horizontal...

The ionic strength of a solution containing $0.01 \mathrm{M}$ of $\mathrm{CaCl}_{2}$ and $0.001 \mathrm{M}$ of $\mathrm{Na}_{2} \mathrm{SO}_{4}$ is _________ $\mathrm{M}$...

The $\mathrm{pH}$ of a solution containing $0.1 \mathrm{M}$ of acetic acid and $0.05 \mathrm{M}$ of sodium acetate is __________ $\text{(rounded off to $2$ decimal places...

Consider the equation for a curve, $y=f(x)=x^{2}+x$.The area enclosed by the curve, the $x$-axis $\text{( $y=0$ line)}$; the vertical lines passing through $x=1$ and $x=2...

Based on the ISO $14040$ methodology for Life Cycle Assessment, match the terms with the descriptions in the table.TermDescription$\text{(a)}$ Goal and Scope$\text{(i)}$ ...

Water is flowing FULL through a rectangular tunnel of size $3 \mathrm{~m}$ (width) $\times 2 \mathrm{~m}$ (height). The average velocity of flow is $1 \mathrm{~m} / \math...