Recent questions

​​Which option(s) correctly match(es) the $\textbf{Polymer property}$ with its appropriate $\textbf{Units}$?$$\begin{array}{|l|l|l|l|}\hline & \textbf{Polymer property} &...

​​​​​Which option(s) correctly match(es) the $\textbf{Class of additives}$ used during polymer compounding with the corresponding $\textbf{Chemicals}$?$$\begin{array}{|l|...

​​​In a set of copolymerization reactions, the following monomer reactivity ratios ($\textbf{r 1}$ and $\textbf{r 2}$) were found for different cases.$$\begin{array}{|c|c...

​​The crystallization of a polymer can only proceed in a temperature range limited to glass transition temperature ( $T_{g}$ ) on the lower side, and the equilibrium melt...

The heat of polymerization of ethylene is $25 \mathrm{kcal} / \mathrm{mol}$. The amount of heat generated during the polymerization of $5.6$ $\textsf{kg}$ polyethylene is...

The density of an amorphous polymer is $0.77 \mathrm{~g} \mathrm{~cm}^{-3}$ and that of its crystalline counterpart is $0.99 \mathrm{~g} \mathrm{~cm}^{-3}$. The density o...

Titration was used to determine the molar mass of two linear monodisperse polymers $\text{A}$ and $\text{B}$. Both the polymers possess the same repeat unit and contain a...

A unidirectional composite of a resin is prepared with continuous fibers, wherein the volume fraction of the fiber in the composite is $0.7$. Assume that the resin has a ...

A rubber contains $70 \mathrm{wt} \%$ butadiene (molar mass $=54 \mathrm{~g} / \mathrm{mol})$, $20 \: \mathrm{wt} \%$ isoprene (molar mass $=68 \mathrm{~g} / \mathrm{mol}...

​​​​​Which of the following contains the phytonutrient allicin?GrapeCauliflowerGarlicChilli

​​​​​Which genus of bacteria does $\textsf{NOT}$ have cell wall?LactobacillusStaphylococcusMycoplasmaEscherichia

​​​Which of the following pigment does $\textsf{NOT}$ have pro-vitamin A activity?$\beta$-Carotene$\beta$-CryptoxanthinLycopene$\alpha$-Carotene

​​​Identify the analysis that must be performed FIRST to judge 'cleanliness' of spice/herb powders.Acid-insoluble ash contentPesticide residue levelsVolatile oil contentM...

​​​​If there is a delay in oil extraction after bran is separated from the brown rice, the quality of rice bran oil deteriorates. Identify the suitable $\textsf{CAUSE}$ a...

​​​​​Among the following, which is/are the process(es) that lead to generation of new fats from existing ones?TransesterificationDegummingHydrogenationWinterization

The true density and bulk density of wheat grains are $1280 \mathrm{~kg} / \mathrm{m}^{3}$ and $740 \mathrm{~kg} / \mathrm{m}^{3}$, respectively. The porosity of the grai...

Potato slices weighing $50 \: \mathrm{kg}$ is dried from $60 \%$ moisture content (wet basis) to $5 \%$ moisture content (dry basis). The amount of dried potato slices ob...

​​​​Identify the gas composition (in percent) suitable for packaging cured meat under $\textsf{MAP}$ conditions.$\mathrm{O}_{2}=0 ; \mathrm{CO}_{2}=50 ; \mathrm{N}_{2}=50...

​​​​Which of the following sequence of events occurs during formation of egg-white gel?Assume: $\mathrm{P}_{\mathrm{N}}$: Native protein; $\mathrm{P}_{\mathrm{D}}$: Denat...

​​​In canning and retorting of foods, which of the following is the correct expression of Ball process time $(\mathrm{B})?$Assume: $\mathrm{t}_{\mathrm{p}}=$ processor's ...

​​​​Which of the following is the most suitable flexible packaging laminate for dry fruits?$\textsf{PET/LDPE}$$\textsf{PS/LDPE}$$\textsf{BOPP/LDPE}$$\textsf{Nylon/LDPE}$

​​​​Identify the $\textsf{CORRECT}$ sequence of operations for dressing of poultry.Slaughtering and bleeding $\rightarrow$ scalding $\rightarrow$ defeathering $\rightarro...

​​​​Which of the following statement(s) is/are $\textsf{TRUE}$ for a package of gamma-irradiated ($7.5 \: \mathrm{kGy}$) whole chicken?Nutritional quality of the product ...

​​​​Match the following food products in $\text{Column I}$ with their corresponding processes in $\text{Column II}$.$$\begin{array}{|l|l|l|l|} \hline & \textbf{Column I} ...

​​Which of the following is/are inhibitor(s) of enzymatic browning in peeled potatoes?Citric acidEDTAMannitolAscorbic acid

​​​​Match the following enzymes in $\textbf{Column I}$ with their applications in $\textbf{Column II}$.$$\begin{array}{|l|l|l|l|} \hline & \textbf{Column I} & & \textbf{C...

The $\text{F}_{121}$ value of a known microorganism with $\text{Z}$ value of $11^{\circ} \mathrm{C}$ is $2.4 \: \mathrm{min}$ for $99.9999 \%$ inactivation. For a $12\tex...

Consider that specific heat $\left(0\right.$ to $\left.50^{\circ} \mathrm{C}\right)$ of water, water vapour and air remains constant: $4.48,1.88$ and $1.0 \mathrm{~kJ} /\...

A fruit juice is concentrated using an ultrafiltration membrane. A feed stream at $10 \mathrm{~kg} / \mathrm{min}$ with $6 \%$ total solids (by weight) is increased to $2...

In a typical grinding operation, $80 \%$ of the feed material passes through a sieve opening of $4.75 \: \mathrm{mm}$; whereas, $80 \%$ of the ground product passes throu...

​​​​​During which of the following times of the day is the $2 \: \mathrm{m}$ air temperature usually the lowest at a tropical location?At sunriseAt noonAt sunsetAt midnig...

​​​At which of the following locations in the atmosphere is the anvil of a towering cumulonimbus cloud usually located?Top of the surface layerTop of the boundary layerTr...

​​​Which one of the following is the main reason why tropical cyclones rarely form over the Bay of Bengal during the summer monsoon season?Strong vertical wind shear.Weak...

​​​​​Which one of the following is the main cause of the land-sea temperature contrast that drives phenomena like sea breeze and the Indian summer monsoon?Difference in t...

​​​​The directions of the South Pacific Subtropical Gyre and the North Atlantic Subtropical Gyre are $\_\_\_\_\_$ and $\_\_\_\_\_$, respectively.clockwise; counter-clockw...

​​​​​The time period of the inertial oscillation at a location $\textsf{R}$ is $1.5$ times that of a particle moving at a speed of $0.5 \mathrm{~m} \mathrm{~s}^{-1}$ at a...

​​​Which of the following Period(s) correspond(s) to wind waves?$5$ seconds$20$ seconds$6$ hours$12$ hours

Accumulated rainfall is often measured in $\mathrm{mm}$. If the density of rain water is $1000 \: \mathrm{kg} \mathrm{m}^{-3}$ then, one mm of rain is equal to $\_\_\_\_...

Acceleration due to Coriolis force of a water parcel at a location $\mathrm{P}\left(67^{\circ} \mathrm{E}, 20^{\circ} \mathrm{N}\right)$ moving with a speed of $0.35 \mat...