Choice questions on solid solid separation methods doc

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Choice questions on solid solid separation methods doc

Show all 10 random questions. KS3 Science Chemistry multiple choice Quiz on States of Matter Gases Liquids Solids State changes melting boiling freezing evaporation condensation diffusion practice questions based on the National Curriculum syllabus specification.

EMAIL query? Which of the following statements best describes the arrangement of particles in a gas? Which of the following statements best describes the arrangement of particles in a solid? Which of the following statements best describes the arrangement of particles in a liquid? Which of the following best describes what happens to the particles of water when it freezes? Which of the following best describes what happens to the particles of ice when it melts? Which of the following best describes what happens to the particles of water when it boils?

Which of the following best describes what happens to the particles of water vapour when it condenses? Which of the following best describes what happens to the particles of water when it evaporates? The table shows the melting points and boiling points of some substances A to D. Which substance is a solid at 25 o C? Which substance is a liquid at 0 o C? Which substance is a gas at 0 o C? Which substance is a liquid at 30 o C? Air is in a bottle with a tight screw-top.

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When the bottle becomes warmer, the pressure inside increases because the molecules of air? When the bottle becomes cooler, the pressure inside decreases because the molecules of air? When the air in a room becomes warmer a hanging balloon blown up with air becomes bigger because the molecules of air?

When the air in a room becomes cooler a hanging balloon blown up with air becomes smaller because the molecules of air? Which substance is a liquid at 20 o C? Which substance is a solid at 20 o C? Which substance is a gas at o C? Which substance is a liquid at o C and a gas at 10 o C? When water vapour in a cloud is gradually cooled, rainwater is formed. This change of state is called?

Heat from the Sun changes water from liquid to a gas. Gases diffuse because they? Liquids and dissolved solids diffuse because they?A suspension is formed from uniform particles of solid, of diameter 10 Mm, suspended in a solvent. What is the best description of this system?

Which of the following sequences correctly describes the change in domain structure as more oil is added to a water-in-oil emulsion? Which method for the production of dispersions involves the formation of particles from materials dissolved in true solutions? Which of the following is not a mechanism for the separation of a physically unstable suspension of magnesium hydroxide in water? In the DLVO theory of colloids, normal thermal motion may be sufficient to overcome the energy barrier that leads to irreversible particle aggregation.

The name of this energy barrier is which one of the following? Instructions Answer the following questions and then press 'Submit' to get your score.

Question 1 How might solid sodium carbonate be obtained from sodium carbonate solution? Question 2 What is the best description of blood? Question 3 A suspension is formed from uniform particles of solid, of diameter 10 Mm, suspended in a solvent. Question 4 Which one of the following dispersions does not have liquid continuous phase? Question 5 Which one of the following systems has the smallest sized domains in its dispersed phase? Question 6 Which of the following sequences correctly describes the change in domain structure as more oil is added to a water-in-oil emulsion?

Question 7 Which method for the production of dispersions involves the formation of particles from materials dissolved in true solutions? Question 8 The scattering of light by coarse and colloidal dispersed systems is known as? Question 9 Which of the following is not a mechanism for the separation of a physically unstable suspension of magnesium hydroxide in water?

Question 10 In the DLVO theory of colloids, normal thermal motion may be sufficient to overcome the energy barrier that leads to irreversible particle aggregation.Search this site. I hope that you find this website useful! Please explore the links below for the study notes and questions for each subject! Contact Me. Motivation and Study Techniques Videos. Study Tips. Useful Links. Binomial Theorem. Coordinate Geometry. Equation of Circles. Indices, Surds, and Logarithms.

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choice questions on solid solid separation methods doc

Plant Reproduction. Transport in Plants. Acids, Bases and Salts. Air, Oxygen, Atmospheric Pollutants. Bonding and Structure. Chemical Calculations. Chemical Calculations Challenging Questions. Elements, Compounds and Mixtures. Kinetic Particle Theory, Gas Law.

Methods of Purification. Organic Chemistry. Qualitative Analysis. Rate of Reactions. Redox Reactions. The Periodic Table of Elements. Emath formulas and notes.Multiple choice questions appear throughout both exam papers, and at both foundation tier and higher tier.

Multiple choice questions are usually asked as questions, often starting with 'what is You have four options to choose from in a multiple choice question. You must only chose one of these options, by placing a tick or cross in a box. You will not get a mark if you leave all the boxes blank, or if you put a tick or cross in more than one box.

Substances can be pure or they can be mixtures. Which of these is a mixture? This question has been written by a Bitesize consultant as a suggestion to the type of question that may appear in an exam paper. Which method is the best for separating sodium chloride from a solution of sodium chloride in water?

choice questions on solid solid separation methods doc

Which of the following separation methods relies on differences in boiling points? A, B, C and D are mixtures of food colourings.

They are investigated using paper chromatography. The diagram shows the chromatogram at the end of the experiment. Which mixture contains an insoluble food colouring?

choice questions on solid solid separation methods doc

Edexcel question courtesy of Pearson Education Ltd. States of matter and mixtures - Multiple choice questions Multiple choice questions appear throughout both exam papers, and at both foundation tier and higher tier.

Sample question 1 - Foundation Question Substances can be pure or they can be mixtures. Reveal answer up.

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Carbon dioxide. Fractional distillation. Paper chromatography. Fractional distillation and simple distillation. Fractional distillation and filtration. Simple distillation and paper chromatography. Filtration and paper chromatography. Mixture A. Mixture B. Mixture C. Mixture D.Separation of Mixtures Multiple Choice Quiz. Multiple choice quiz of 20 questions. Try it as often as you like. You will get a different set of questions each time you attempt this quiz. Which one of the following techniques would best be used to separate soil and water?

In a coffee machine, the ground coffee is separated from the coffee solution by using. The diagram shows the apparatus for separating soil and water. What are the labelled parts? Which one of the following methods would NOT be used to separate an insoluble solid and a liquid?

The separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known as. In the process of evaporation, which one of the following pieces of laboratory apparatus would NOT be used? In the distillation apparatus shown, what are the parts labelled A and B? Water and alcohol are easily separated by distillation because of their.

Sodium chloride can be separated from rock salt by first adding water to the mixture to dissolve the sodium chloride. The separation then takes place in two stages:. The separation technique shown in the diagram is. Two or more substances mingled together, but not chemically combined are known as a.

Dyes in water soluble markers may be separated by means of. Which one of the following pairs of separation techniques will BOTH separate salt from a mixture of salt and water? The diagram shows the chromatogram for three colouring dyes and that for a brown marker.

What dye s are contained in the marker's ink? Which of the following pairs of substances may best be separated through distillation? Liquids that do not mix may be separated by using.

Liquids that do NOT mix are said to be. Which one of the following would you use to separate sand from iron filings? Oil and water may be separated by using. Which one of the following methods is used to separate the colours in food dyes? Name the separation technique shown in the diagram. Which one of the following is NOT an example of a separation technique? The process of evaporating a liquid and then condensing the vapour by cooling it is known as.

The phenomenon of water being able to rise up a narrow tube is called. A magnet could be used to separate. Two changes of state occur during distillation. What are these changes of state?In wastewater treatment, all wastestreams consist of solid and liquid components — all of them. The first step in the treatment process is to remove as much as is feasible of the solid components hereafter referred to as the solid phase from the liquid ones.

These steps may involve bar screens, various filtering technologies, sedimentation basins of one sort or another, clarifiers, other separation technologies such as centrifugation, other physical means impaction, for exampleand even chemical treatment. The second step involves the treatment of the liquid components wastestream by means of chemical and biological methods.

A commonly used method involves the application of activated sludge and ancillary procedures including oxygenation and chemical "charging" to result in the destruction of pollutants that have deleterious effects on the environment toxic ions and organic compounds, for example or that have both a direct and an indirect environmental effect by lowering aqueous oxygen levels. All ensuing steps in wastewater treatment are relegated to the category of tertiary treatment.

These usually include methods for removal of additional components of the liquid phase, advanced treatment technologies for the further separation of difficult-to-remove solid components, and remediation and treatment of engendered sludges resulting from the solid-phase components.

Qualitative Analysis Revision MCQ Questions

The solid and liquid phases of the wastewater stream both contain mixtures of various substances which are physically combined but may, or may not, be chemically combined. Furthermore, these mixtures may differ in chemical and physical properties from the individual substances from which they originated. These solid-phase wastestream components may be categorized as settleable solids, suspended solids, or colloidal solids.

The liquid-phase components are designated as colloids, soluble compounds, gases, or ions. In fact, ions are charged solvated solids that have chemically reacted with the solvent usually water in the wastestream to enter into the solution. Colloids are solids of such small size that they are dispersed with an adsorbed charge to maintain stasis in the liquid phase.

These colloids are actually mixtures either homogenous or heterogeneous in which the particles are invisible to the naked eye, cannot be removed by filtration, but can be contained within a semi-permeable membrane.

Solids may be encountered in liquids under several forms: solutions, colloidal dispersions, and solid suspensions. As previously mentioned, the nature of these states depends on the size of the solid particles. Although we keep repeating ourselves on much of this, it can be a fruitful field for consideration, and much knowledge of the true state and mechanisms involved are slowly realized as we delve into them with increased knowledge. Settleable solids include those that are quite large and can be removed via screening procedures, as well as those that are somewhat smaller which can be removed by settling them out in appropriate structures.

Colloids are considered dispersed — that is, not chemically bound — but they are characterized by an adsorbed surface charge which enables them to maintain a stable dispersion. Separation would be more easily attained between the solid and liquid phases if the solid-phase material and particulates were larger and heavier to allow gravity separation of the solid phase.

As these particulates get smaller and lighter as colloids, significant separatory problems arise. And, of course, solvated particulates and ions, which are even smaller and lighterrequire chemical changes to separate them. By using appropriate coagulants and flocculants, we are able to increase the density of the treated mixture components and thus let our old friend gravity assist us in their separation.

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Some of this involves collapsing electrostatic charge fields that stabilize some of the colloids and by using chemical changes to induce chemical reactions to form precipitates in the dissolved solutes or otherwise change them into more manageable forms. At this point it would be advantageous to realize that coagulation and flocculation are not the same thing synonymous, that isbut they are frequently considered as synonymous.

As a rule, coagulation is the process by which colloids are removed from a liquid phase by "precipitation" — essentially, an induced aggregation. These colloidal particles and very fine solid suspensions as well are physically destabilized so that they can agglomerate under the appropriate conditions. This is usually accomplished quickly with a maximum amount of vorticity stirring ; whereas, flocculation facilitates the settling of suspended solids in solutions or in dispersions which have been "collapsed" and results in the conglomeration of these aggregated particulates into even larger aggregates for ease in separation.

Flocculants are considered bridge-formers among the agglomerated clumps of solids, making them larger, and the flocculants are usually if not always applied with very gentle mixing to allow the growth of the flocculant particulates. These dispersed solids colloids suspended in wastewater streams are stabilized for the most part by negative electric charges on their surfaces. This causes them to repel each other. Because this action prevents these charged particles from colliding to form larger masses, called flocs, they do not settle.

To assist in the removal of these colloidal particles from suspension dispersionchemical coagulation and flocculation are required. These processes, usually performed sequentially, are a combination of chemical and physical procedures. Chemicals are mixed with the wastewater streams to promote the aggregation of the suspended solids into particles of sufficient size to settle or be removed. Coagulation literally means to curdle and refers to the process of blood clotting and the formation of clots or large lumps or even to sour milk forming curds.

It is the process by which colloidal particles and very fine solid suspensions initially present in a wastewater stream are combined into larger agglomerates that can be separated by means of sedimentation, flocculation, filtration, centrifugation, or other separatory methods.

Chapter 10: Multiple choice questions

This refers to a chemical process in which destabilization of non-settleable particles is realized.We wont spam you, we don't believe in that. However we may contact you about future promotions and news about EdPlace. If you are happy to be contacted, please tick the box. Are you looking to set up a school or business invoice account?

Understanding Separation Essentials For Wastewater Treatment

Request access. In this worksheet, students will be exploring some of the ways we can separate the different substances in a mixture. Difficulty level:. We often come across things that have been mixed together. If you pour muesli into a bowl at breakfast time you can see that it is a mixture of things like oatflakes, fruits and nuts. Another, not so tasty, mixture might be the paper, glass and tins in a recycling bin. The things in a mixture don't join together to make something new.

They can be separated out. These beans and peas make a colourful and nutritious! With a lot of patience they could be separated into small piles of different peas and beans. You are helping out in the garden and you've been asked to get some of the big stones out of the soil.

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What do you use if you want to separate solid particles from a liquid, like 'bits' from orange juice? A solution is a type of mixture in which one substance is dissolved in another, for example salt dissolves in water.

This means that the salt is mixed into the water in such tiny particles you can't see them any more. The people at a recycling plant want to separate out the iron and steel from the other scrap metals. Imagine that on a camping trip some sand has ended up in the jar of coffee granules.

No one wants sand in their cuppa! When "proper" coffee is being made using ground coffee instead of instant coffee granules, it is often made in a machine like this. If the coffee is allowed to boil for too long, the solid coffee and the liquid water would become separated once again. We're here to help your child succeed. Track progress, measure results and access thousands of online tutorial worksheets in Maths, English and Science with an EdPlace subscription.

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