Chemistry Concepts Quiz - Day 1 & 2
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Questions and Answers

What is defined as a disturbance which is externally applied to the system?

  • Oscillation
  • Output disturbance
  • Perturbations (correct)
  • Impedance

Which substance can be readily converted into dye or other colored compounds?

  • Chromogen (correct)
  • Anlagen
  • Acrogen
  • Goitrogen

What optimization technique is commonly used in chemical process project design to determine the optimum utilization of resources?

  • Linear programming (correct)
  • Step-wise
  • Cost-value
  • Dynamic programming

Which primary organic component of oil shale is primarily referenced?

<p>Kerogen (A)</p> Signup and view all the answers

What does heat capacity defined as C=dQ/dT indicate about its relationship to Q?

<p>It is a process dependent (D)</p> Signup and view all the answers

Who defined design as the conversion of an ill-defined requirement into satisfied customer?

<p>Casey (B)</p> Signup and view all the answers

In reactor design, what concern is highlighted with the question: 'what changes can we expect to occur?'

<p>Reaction rate (D)</p> Signup and view all the answers

Which example represents local equilibrium?

<p>Boiling steam (C)</p> Signup and view all the answers

What is the middle root assumption in the cubic equation of state?

<p>No significance (B)</p> Signup and view all the answers

Which type of compounds is the Lee/Kesler correlation applicable to?

<p>Polar and slightly polar (A)</p> Signup and view all the answers

What is the primary nucleation process in crystallization?

<p>Primary nucleation (C)</p> Signup and view all the answers

What pattern is likely to occur when disintegrating a particle with two rigid forces?

<p>Impact (B)</p> Signup and view all the answers

Under what condition do silica & alumina form a eutectic?

<p>97.5% SiO2 @ 1355°C (C)</p> Signup and view all the answers

Which statement correctly describes a screw conveyor?

<p>Contains a helical blade that moves liquid or granular materials within a tube (A)</p> Signup and view all the answers

What is a common product of the distillation of coal tar?

<p>Phenol (D)</p> Signup and view all the answers

What does the acid test ratio measure?

<p>Ratio of current assets (excluding inventory) to total current liabilities (B)</p> Signup and view all the answers

Which method is used to compare worth from different years?

<p>Annual worth analysis (B)</p> Signup and view all the answers

What defines an aquifer?

<p>A layer of water-bearing rock located underground that transmits water (C)</p> Signup and view all the answers

When the discriminant of a quadratic equation is greater than zero, what can be said about the roots?

<p>The roots are real and unequal (A)</p> Signup and view all the answers

What is the fundamental basis of the law that recognizes the rights of indigenous cultural communities to their ancestral lands?

<p>Indigenous Peoples Rights Act (A)</p> Signup and view all the answers

Which best describes the lowest possible probability?

<p>0 (C)</p> Signup and view all the answers

What is a type of rosette that consists of three electrical resistance strain gauges oriented at angles of 0°, 60°, and 120° with the x-axis?

<p>Delta (D)</p> Signup and view all the answers

What characterizes a probationary employee?

<p>They work for a limited period to assess qualification for permanent employment (A)</p> Signup and view all the answers

Flashcards

Perturbation

An externally applied disturbance to a system.

Chromogen

A substance that easily creates dyes or colored compounds.

Cement

A product of alumina and silica at high temperature.

Linear programming

An optimization technique for chemical process design to utilize resources efficiently.

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Kerogen

The primary organic component of oil shale.

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Interlock

A protective response triggered by detecting a process hazard.

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Heat capacity

Defined as C=dQ/dT, representing the amount of heat required to raise the temperature of a substance by a unit degree/kelvin.

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Gasification

Coal conversion to substitute natural gas, where methane (CH4) forms in a specific hydrogenation zone.

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Acid Test Ratio

A liquidity ratio that measures a company's ability to pay its short-term liabilities with its most liquid assets (excluding inventory).

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Present Worth Cost Method

A method for comparing projects by discounting all future cash flows to their present value and selecting the project with the lowest present worth cost.

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Aquifer

A layer of underground rock that stores and transmits water in sufficient amounts to supply wells or springs.

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Focus of a Parabola

The point that is equidistant from all points on the parabola and the directrix.

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Discriminant > 0: Roots?

When the discriminant (b² - 4ac) of a quadratic equation is greater than zero, the roots are real and unequal.

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Ancestral Lands Rights

The Philippine Constitution protects the rights of Indigenous Cultural Communities to their ancestral lands.

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Lowest Probability

The lowest possible probability value is 0, meaning an event is impossible.

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Delta Rosette Strain Gage

A type of rosette composed of three electrical resistance strain gages arranged at 0°, 60°, and 120° angles with the x-axis.

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Cubic Equation of State Middle Root

In the cubic equation of state, the middle root represents the liquid phase, but its significance depends on the system and the specific conditions. It may be important for some systems while having negligible impact in others.

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Lee/Kesler Correlation Applicability

The Lee/Kesler correlation is a method for predicting the thermodynamic properties of fluids, but it specifically applies to non-polar and slightly polar compounds, not polar ones.

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Primary Nucleation

Primary nucleation is the initial formation of new crystal nuclei during the crystallization process. It happens spontaneously when supersaturation levels are reached.

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Particle Disintegration by Rigid Forces

When a particle is broken apart by two rigid forces, it's called impact. This involves a strong, localized force, leading to splitting or shattering.

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Silica and Alumina Eutectic

When a mixture of silica and alumina is heated, they form a eutectic point at 97.5% SiO2 and 1355°C. This means that at this specific composition, they melt at a lower temperature than either component alone.

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Screw Conveyor Function

A screw conveyor is a mechanical device that transfers bulk materials (usually dry) from one location to another using a helical blade rotating within a tube.

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Coal Tar Distillation Product

One of the products obtained from coal tar distillation is phenol, a key building block for various chemical industries.

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Optimal Design

An optimal design represents the 'best' option within the given constraints. It balances performance, cost, and other factors to achieve the most desirable outcome.

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Study Notes

Day 1

  • Resonance theory was developed by Linus Pauling to explain bonding in molecules or ions not covered by Lewis Octet Rule.
  • Gluconeogenesis is the generation of glucose from certain non-carbohydrate precursors during prolonged starvation.
  • Ethylene is a precursor to vinyl chloride.
  • Diamond's structure is due to strong covalent bonding.
  • Aromatic functional groups produce aryl compounds when hydrogen is removed.
  • Electronegativity ranges from 0 to 4.
  • Magnesium reacts with nitrogen to produce magnesium nitride and hydrogen gas.
  • Ferric sulfate is a common coagulant used for water purification.
  • MSDS stands for Material Safety Data Sheet.

Day 2

  • Benzene has 3 sigma bonds per carbon.
  • Malic acid is the predominant organic acid in apples.
  • There are 23 amino acids in a human protein.
  • Ozonolysis is a reaction that cleaves unsaturated bonds with ozone.
  • Edman Degradation is a method for sequencing amino acids by sequentially removing them from the amino end of a peptide.
  • The ratio of the mass of the sun to the earth is 333,000.
  • The ratio of the diameter of the sun to the earth is 109.
  • The formula for red lead is Pb3O4
  • Deuterium was discovered by Harold Urey.
  • Ca2+ produces a pinkish-red color in a flame test,
  • Conversions of alcohol to alkyl group is an organic reaction.

Day 3

  • The oxidation number of carbon in CrF63+ is 3.
  • Magnesium is isoelectronic with Xe.
  • Co-60 is used in kidney scans, th-201 in cancer therapy, tritium measures water content in the body, and Hg-197 in heart scans.
  • Geraniol has 2 double bonds.
  • A saturated aliphatic hydrocarbon is called a paraffin.
  • When a system does work during adiabatic expansion of an ideal gas, the Internal Energy decreases.
  • Calcium carbonate is commonly known as chalk.
  • The chemical formula for laughing gas is NO2
  • The main components of cement are Fe, Ni, Si, and Al.
  • The troposphere is the nearest layer to the surface of the Earth.
  • Nuclear fission was discovered during the process researched by a Nobel Prize recipient.

Day 4

  • The oxidation number of C in CrF63+ is 3.
  • The element isoelectronic with Xe is K +
  • Co-60 , Th-201 , Tritium, and Hg-197 are used in various applications.
  • Geraniol has 2 double bonds.
  • A hydrocarbon is also called a paraffin.
  • During adiabatic expansion of an ideal gas, Internal Energy decreases.
  • Calcium carbonate is the chemical formula for chalk.
  • The chemical formula for laughing gas is N2O.
  • The main components of cement are Fe, Ni, Si, and Al.
  • The nearest atmospheric layer to Earth is the troposphere.
  • The topic discusses nuclear fission and a Nobel Prize winner.

Day 5

  • Methanol is a chemical compound.
  • Polystyrene is a type of polymer,
  • System complexity is important in automation.
  • A catalytic agent used in the Haber-Bosch process is platinum.
  • A perfume fixative extracted from deer glands is castoreum.
  • Polya is a good reference for problem solving and design within constraints.
  • A technique to produce sodium sulfate is the Hargreaves' process.
  • The calculation and analysis process for a manufacturing project is called cost estimation.
  • The topic describes the components in a glass production process.
  • Water softening has been studied using zeolites, a scientific discovery.

Day 6

  • Some plants have fruits that release vanilla flavoring.
  • Plants categorized as Climbers
  • Air Liquide is a large chemical producer worldwide.
  • Sodium sulfite is a deoxygenating agent in boilers.
  • Sodium hexametaphosphate prevents rust and corrosion in pressure-boiling water.
  • Maxwell's effect and Seebeck effect are considered in electrical conductors
  • Dryers, heat exchangers and distillation columns are related to engineering processes.
  • The purpose of sizing in paper manufacture is increasing water resistance and prevention of ink blurring when printing.
  • Rheological behavior relates to the flow behavior in fluids.

Day 7

  • In standard state, pressure is high.
  • Emissivity is the ability of material to radiate absorbed energy.
  • Cavitation is the reduction in liquid pressure and formation of bubbles.
  • A membrane separation process, Reverse Osmosis is used when a membrane is used to separate solvent from a solution.
  • High-pressure gas phase reactions are carried out in a tubular flow reactor.

Day 8

  • Chairperson of PRC is used in an example.
  • Acid test ratio is a comparison of the amount of current assets (excluding inventory) compared with total current liabilities.
  • The Clean Water Act of 2004 defines an aquifer.
  • A parabola's focus is a point from which all points are equidistant.
  • The process where the discriminant is greater than 0.
  • There are acts and regulations on solid waste, hazardous substances and nuclear waste in the Philippines.
  • The term "lowest possible probability" refers to the likelihood of an event between 0% and 100%.

Day 9

  • Rosettes are used in strain gages to measure angles.
  • A term employee is someone being monitored for possible permanent employment.
  • The term used to measure the level of stress applied to a material that experiences equal compressions on all sides is called uniaxial normal stress.

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Test your knowledge on key chemistry concepts including resonance theory, gluconeogenesis, and the properties of various compounds. This quiz covers essential topics in organic and inorganic chemistry, along with practical applications in water purification and amino acid sequencing. Challenge yourself with these intriguing questions!

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