Exploring Mixtures and their Separation

Which of the following statements about pure substances is correct?

Phosphorus and Sulfur are examples of:

Magnesium is a shiny, greyish-white solid that conducts heat. It is a/an:

What happens to the individual properties of Hydrogen and Oxygen when they form the compound Water?

Colloids are classified based on the physical state of the dispersed phase and the dispersing medium. Examine the flowchart below. Which of the following pairs of examples correctly represents Colloid X and Colloid Y?

A student is provided with a mixture of iron filings, common salt, and chalk powder. The following flowchart outlines the steps used to separate these three components. Identify Substance 1, Residue B, and the contents of Filtrate C.

Which of the following is a compound used in daily life?

A substance 'Y' is made of two types of atoms. These atoms are bonded together such that they can only be separated by an electrochemical reaction. Substance 'Y' is a/an:

Calcium Carbonate ($CaCO_3$) is a pure substance. When it is heated strongly, it breaks down into Calcium Oxide ($CaO$) and Carbon Dioxide ($CO_2$). This process is known as:

Identify the element that is used in thermometers and is the only metal found in a liquid state at room temperature.

In which type of mixture are the particles uniformly distributed throughout the volume?

Which gas is found in the highest percentage in the mixture we call air?

If $5\text{ g}$ of glucose is dissolved in $45\text{ g}$ of water, what is the concentration in mass percentage?

What happens to the concentration of a solution if we add more solvent to it?

A student categorizes various mixtures based on the diameter of their solute particles as shown in the flowchart. Which category specifically represents the properties of a 'True Solution', such as a solution of sugar in water?

A solution contains $50$ g of sugar in $450$ g of water. Its concentration is:

Which concentration term is independent of the mass of the solvent, using volume instead?

Which of the following is the correct order of particle size for the three types of mixtures?

An $8\%$ solution of common salt is concentrated by evaporation until its mass reduces from $200$ g to $150$ g. What is the new concentration?

In a laboratory, a student accidentally mixed iron filings and sulfur powder. Then the student added $CS_2$ (Carbon disulfide) to a part of this mixture and filtered it. What will be the observation?

Which of the following is a physical change occurring in the kitchen?

When a fruit ripens, its color and taste change. This is a:

What type of change is the formation of a rainbow?

In which of the following cases does a chemical reaction occur?

A student performs two different experiments with water ($H_2O$) as shown in the flowchart below. Based on the chemical principles of matter, which statement accurately describes the nature of these changes?

Which statement correctly distinguishes between a mixture of hydrogen and oxygen gases and the compound water formed from them?

Distillation is a method used to separate liquids with different boiling points. This method relies on:

Which of the following describes a scenario where both a physical and a chemical change are occurring simultaneously?

Why is the 'Magnetization of an Iron Nail' using a permanent magnet considered a physical change?

In the 'Contact Process' for making sulfuric acid, $SO_{2}$ is converted to $SO_{3}$ using a $V_{2}O_{5}$ catalyst. This step is a:

Which of the following is NOT a method used to separate mixtures?

Which of the following processes is used to separate salt from sea water in large scale?

At $40^{\circ}C$, the solubility of a salt is $40\text{ g}$ per $100\text{ g}$ of water. If a solution contains $30\text{ g}$ of this salt in $100\text{ g}$ of water at $40^{\circ}C$, it is:

Based on the solubility curve provided, what happens to the solubility of most solids in liquids as temperature increases?

Which property of the components of a mixture is used in the separation technique of chromatography?

Using the solubility graph for Sodium Nitrate ($NaNO_3$), if $100\text{ g}$ of water is saturated at $50^{\circ}C$ (solubility $\approx 110\text{ g}$) and cooled to $20^{\circ}C$ (solubility $\approx 80\text{ g}$), how much salt precipitates?

A student wants to separate a mixture of sand and salt. Which sequence of steps should they follow?

A chemist is testing the purity of a sample of Cerium Sulfate ($Ce_2(SO_4)_3$). Unlike most solids, its solubility decreases as temperature increases, as shown. If a saturated solution at $10^{\circ}C$ is heated to $50^{\circ}C$, what will be observed?

In a crystallization factory, a solution of salt 'M' is processed. The solubility of 'M' follows the curve shown. If a technician has a saturated solution in $500$ g of water at $40^{\circ}C$ and wants to recover $100$ g of crystals, to what temperature must the solution be cooled?

A chef wants to make a sugar syrup (sucrose) for a dessert. The graph shows the solubility of sucrose in water. If the chef has $100$ ml of water at $80^{\circ}C$ and adds $350$ g of sugar, which of the following is true after the solution is stirred thoroughly?

In a sugar solution, the concentration by mass percentage is calculated as:

Which of the following can be separated by the method of winnowing?

Pure substances that are made up of only one kind of atom are called:

Which of the following is a mixture?

Colloids are classified into different types based on the physical state of the dispersed phase and the dispersing medium. According to the relationship shown in the diagram, what is the specific classification of this colloid?

A laboratory technician needs to separate a three-component mixture of sand, iron filings, and iodine crystals. Following the sequence shown in the flowchart, which techniques should be used for Method 1 and Method 2?

Which of the following is the correct definition of an element given by Antoine Laurent Lavoisier?

A student is provided with a clear, homogeneous liquid $S$. A series of experiments are conducted as shown in the flowchart. Based on the observations of how $S$, $A$, and $B$ behave, which of the following statements is scientifically accurate?

The concentration of a solution is $20\%$ (mass/volume). If the volume of the solution is $500 mL$, what is the mass of the solute present?

Which of the following is not a property of metals?

Jelly and butter are examples of:

To separate dyes in black ink, we use:

A pure substance consists of:

What defines an 'unsaturated solution'?

Which of the following can be separated by using a separating funnel?

What type of mixture is 'Face Cream'?

Alloys are considered mixtures because:

A student performs an experiment by mixing two different sugar solutions. Solution A consists of $250 g$ of a $20\%$ (mass by mass) solution, and Solution B consists of $150 g$ of a $40\%$ (mass by mass) solution. After mixing them, the student adds another $100 g$ of pure water to the mixture. What is the final concentration of the resulting solution in terms of mass by mass percentage?

A saturated solution of salt $X$ is prepared at $353 K$ using $100 g$ of water. The solubility of $X$ is $120 g$ per $100 g$ of water at $353 K$ and $70 g$ per $100 g$ of water at $313 K$. The solution is cooled to $313 K$ and the resulting crystals are filtered out. If the filtrate is then reheated to $353 K$, what is the minimum mass of salt $X$ that must be added to this filtrate to make it saturated again at the higher temperature?

A student was asked to identify a bottle containing a liquid. He found that the liquid boils at a constant temperature of $78^\circ C$ and leaves no residue upon evaporation. The liquid is likely to be:

Which method is used for the purification of sea water to get drinking water on ships?

To separate a mixture of two gases with a very small difference in boiling points, we use:

Which of the following is an example of a gas-gas homogeneous mixture?

Air is first compressed and cooled to produce:

Which of the following is NOT an application of the crystallization technique?

A mixture contains three liquids: A ($B.P. 50^{\circ}C$), B ($B.P. 80^{\circ}C$), and C ($B.P. 110^{\circ}C$). In what order will they be collected from the fractionating column?

Why is it important to use a 'pencil line' instead of an 'ink line' as the baseline in paper chromatography?

Which of these is a key difference between evaporation and distillation when separating a salt-water mixture?

An unknown homogeneous liquid mixture is heated. The temperature remains constant at $70^\circ\text{C}$ for some time while a liquid distills over, then it rises and remains constant at $100^\circ\text{C}$. What can be inferred?

Why is the water condenser kept in a slanting position in a distillation setup?

Fractional distillation is used for the separation of:

The substance that remains on the filter paper during filtration is called:

Separation of dyes in ink by chromatography depends on:

Which component of air has the highest boiling point among Nitrogen, Argon, and Oxygen?

Which property is used in the separation of components of air by fractional distillation?

Which of the following can be categorized as a physical change?

To separate a mixture of salt, sand, and ammonium chloride, the correct order of processes is:

If we want to separate a mixture of Acetone (B.P. $56^{\circ}\text{C}$) and Ether (B.P. $35^{\circ}\text{C}$), which of the following is true regarding their collection?

A mixture of Benzoic Acid and Common Salt can be separated by which method?

What is the purpose of the 'Cotton Plug' at the top of the inverted funnel in the sublimation experiment?

Which of the following observations is NOT related to the Tyndall effect?

A beam of light becomes visible in smoke-filled air because smoke is a:

Which substance would you add to water to demonstrate the Tyndall effect easily at home?

The size of particles in a suspension is usually greater than:

If you shine a flashlight through a glass of lemonade with pulp, the path of light is visible because of:

Which of the following is an example of a solid-in-gas colloid that shows Tyndall effect?

Why does a laser beam look like a solid line of light in a smoky room but is invisible in a clean room?

Which of the following represents the correct order of scattering power (low to high) for the same concentration of particles?

If we pass a beam of light through a 'solid sol' (like colored glass with dispersed metal particles), will the Tyndall effect be observed?

A liquid is found to show the Tyndall effect. It is then centrifuged at high speed, and a small amount of solid settles at the bottom. The supernatant liquid no longer shows the Tyndall effect. The original liquid was most likely a: