Extraction of Indicators 4 (Form 1, Chemistry)

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Quiz on universal indicators for Cameroon's Form 1

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Cameroon

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Extraction of Indicators 4 (Form 1, Chemistry)


Froggy Jumps Extraction of Indicators 4 (Form 1, Chemistry)Version en ligne Quiz on universal indicators for Cameroon's Form 1 par YAKILI LMS 1 What is a universal indicator used for? a To measure temperature b To show how acidic or basic a substance is c To identify metals only 2 Which color is typical for a strong acid on many charts? a Blue b Red c Green 3 What plant extract can be used as a natural indicator? a Litmus from red cabbage b Rosemary oil c Ginger juice 4 Which substance does a universal indicator use to change color? a pH level b Density c Temperature 5 In a basic (alkaline) solution, the indicator color is usually: a Blue or purple b Yellow c Red 6 Which property does a universal indicator NOT measure? a Electrical conductivity b Acidity c Alkalinity 7 A universal indicator changes color across a range from: a 0 to 14 pH b 1 to 7 pH c 7 to 14 pH only 8 Which color typically indicates a neutral solution? a Purple b Orange c Green 9 What is the purpose of the color chart in universal indicators? a To heat solutions b To read pH values by color c To weigh samples 10 Which extraction method can yield plant-based indicators? a Freezing samples b Boiling plant material and filtering c Evaporation of solvents only 11 Which plant part is commonly used to extract natural indicators? a Stems only b Leaves or petals c Roots only 12 Which color shift signifies acidity when using red cabbage extract? a Yellow to orange b Red to pink c Blue to green 13 What is the main goal of using universal indicators in experiments? a Identify acidity or alkalinity b Measure mass c Identify gas types 14 Which statement is true about universal indicators? a They melt at high temperature b They change color with pH c They glow in the dark 15 Which color on a chart often indicates a strong base? a Dark purple b Light yellow c Orange 16 What is one application of universal indicators? a Deciding color of food dye b Measuring speed c Testing soil pH for agriculture 17 How do you prepare a simple plant-based indicator test? a Extract plant material and mix with water b Use plant scent as indicator c Dry the plant and weigh 18 Which color change shows neutral on many indicators? a Green b Red c Blue 19 What should you compare to read the pH from a chart? a The solution's mass b The solution's volume c The solution color against the chart 20 Which factor can affect the color of a universal indicator? a Room temperature only b Color of the container c Concentration of the solution 21 Which indicator color indicates strong base on common charts? a Pale yellow b Dark blue c Dark red 22 What is extracted along with indicator pigments from plants? a Plasticizers b Natural pigments c Salt 23 Which is NOT a typical plant-based indicator? a Red cabbage extract b Spinach extract c Hydrangea extract 24 Which color change is expected for a neutral solution? a Orange b Purple c Green 25 Which chart helps identify pH levels visually? a Temperature chart b Color chart of pH c Mass chart 26 What is the main learning outcome of using universal indicators? a Measure density b Understand acidity and basicity c Identify gases 27 Which indicator is commonly used in classrooms for pH testing? a Battery acid b Universal indicator solution c Glow sticks 28 Which factor is essential when extracting plant indicators? a No safety steps needed b Proper safety and disposal c Use metal containers only 29 Which color indicates very acidic on many charts? a Green b Bright red c Dark blue 30 Which application uses plant extract indicators? a Detect pH in water samples b Measure sound c Bake bread 31 Which is a common source for natural indicators? a Saltwater b Red cabbage c Cornstarch 32 A universal indicator shows a solution's: a Color only b Acidity or basicity c Volume only 33 Which color would you expect for a moderate acid on many charts? a Orange b Purple c Green 34 What must you do before using a plant-based indicator? a Shake vigorously without extraction b Ignite the material c Extract the pigment 35 What is the term for the measure pH indicates? a Acidity/alkalinity level b Temperature c Mass 36 Which color shift indicates a basic solution? a Red to orange b Yellow to pink c Blue to purple 37 What is the safe practice when handling indicators? a Wear gloves and goggles b Ignore spills c Eat nearby 38 Which is a typical use of universal indicators in schools? a Visual pH testing b Counting molecules c Measuring length 39 Which factor helps color accuracy on charts? a Old containers b Fresh reagents c Unlabeled jars 40 Which substance does a universal indicator not identify? a Density b Acidity c Alkalinity 41 Which plant extract color change depends on pH? a Red cabbage extract b Soap solution c Oil 42 What is the main safety concern when extracting indicators? a Ignore fumes b Only one drop needed c Avoid inhaling fumes 43 Which chart reference is used with universal indicators? a Temperature chart b Volume chart c pH color chart 44 Which indicator color is common for neutral substances? a Blue b Red c Green 45 Which step follows extraction of natural indicators? a Heat to dryness b Dry and store only c Test with known pH solutions 46 Which plant part helps in pigment extraction? a Stems only b Roots only c Leaves or petals 47 What is a universal indicator not used for? a Showing pH b Measuring tensile strength c Comparing colors 48 Which color on a chart signals a strong base? a Orange b Dark purple c Yellow 49 Which is an educational goal of this topic? a Explain plant-based indicators b Build engines c Calculate masses 50 What is typically mixed with plant extract to test pH? a Motor oil b Distilled water c Acetone

Extraction of Indicators 4 (Form 1, Chemistry)

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Extraction of Indicators 4 (Form 1, Chemistry)Version en ligne

par YAKILI LMS

What is a universal indicator used for?

Which color is typical for a strong acid on many charts?

What plant extract can be used as a natural indicator?

Which substance does a universal indicator use to change color?

In a basic (alkaline) solution, the indicator color is usually:

Which property does a universal indicator NOT measure?

A universal indicator changes color across a range from:

Which color typically indicates a neutral solution?

What is the purpose of the color chart in universal indicators?

Which extraction method can yield plant-based indicators?

Which plant part is commonly used to extract natural indicators?

Which color shift signifies acidity when using red cabbage extract?

What is the main goal of using universal indicators in experiments?

Which statement is true about universal indicators?

Which color on a chart often indicates a strong base?

What is one application of universal indicators?

How do you prepare a simple plant-based indicator test?

Which color change shows neutral on many indicators?

What should you compare to read the pH from a chart?

Which factor can affect the color of a universal indicator?

Which indicator color indicates strong base on common charts?

What is extracted along with indicator pigments from plants?

Which is NOT a typical plant-based indicator?

Which color change is expected for a neutral solution?

Which chart helps identify pH levels visually?

What is the main learning outcome of using universal indicators?

Which indicator is commonly used in classrooms for pH testing?

Which factor is essential when extracting plant indicators?

Which color indicates very acidic on many charts?

Which application uses plant extract indicators?

Which is a common source for natural indicators?

A universal indicator shows a solution's:

Which color would you expect for a moderate acid on many charts?

What must you do before using a plant-based indicator?

What is the term for the measure pH indicates?

Which color shift indicates a basic solution?

What is the safe practice when handling indicators?

Which is a typical use of universal indicators in schools?

Which factor helps color accuracy on charts?

Which substance does a universal indicator not identify?

Which plant extract color change depends on pH?

What is the main safety concern when extracting indicators?

Which chart reference is used with universal indicators?

Which indicator color is common for neutral substances?

Which step follows extraction of natural indicators?

Which plant part helps in pigment extraction?

What is a universal indicator not used for?

Which color on a chart signals a strong base?

Which is an educational goal of this topic?

What is typically mixed with plant extract to test pH?