Mixtures and Analysis questions

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Mixtures and Analysis question collection

Review Mixtures and Analysis questions for Chemistry, with correct answers shown and coverage across the meaning of a pure substance; mixtures, solutions and dissolving; diffusion in terms of particles.

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Question 1

Which mixture can paper chromatography separate?
  1. Dyes dissolved in a solvent
  2. Sand suspended in water
  3. Oil floating on water
  4. Iron mixed with sulfur

Question 2

In paper chromatography, the solvent is called the?
  1. Mobile phase
  2. Stationary phase
  3. Catalyst phase
  4. Indicator phase

Question 3

In paper chromatography, the paper is the?
  1. Stationary phase
  2. Mobile phase
  3. Reactant phase
  4. Gas phase

Question 4

Which interpretation is most likely when a sample gives one chromatogram spot?
  1. One pure substance
  2. Several separated dyes
  3. An element rather than a compound
  4. A gas rather than a liquid

Question 5

A sample gives several spots on a chromatogram. What is it?
  1. A mixture
  2. A pure compound
  3. A catalyst
  4. A neutral solution

Question 6

What is the test for oxygen gas?
  1. A glowing splint relights
  2. A lit splint gives a squeaky pop
  3. Limewater turns milky
  4. Damp red litmus turns blue

Question 7

What is the test for hydrogen gas?
  1. A lit splint gives a squeaky pop
  2. A glowing splint relights
  3. Limewater turns milky
  4. Orange bromine water decolourises

Question 8

What is the test for carbon dioxide gas?
  1. Limewater turns milky
  2. A glowing splint relights
  3. A lit splint gives a pop
  4. Damp blue litmus turns red

Question 9

Which gas bleaches damp litmus paper?
  1. Chlorine
  2. Hydrogen
  3. Oxygen
  4. Nitrogen

Question 10

What colour is universal indicator in a strong acid?
  1. Red
  2. Green
  3. Blue
  4. Purple

Question 11

What colour is universal indicator in a neutral solution?
  1. Green
  2. Red
  3. Blue
  4. Orange

Question 12

How would you classify a solution with pH 2?
  1. Strongly acidic
  2. Neutral
  3. Weakly alkaline
  4. Strongly alkaline

Question 13

How is a solution with pH 11 classified?
  1. Alkaline
  2. Strongly acidic
  3. Weakly acidic
  4. Neutral

Question 14

What is the solvent in a solution?
  1. The substance that dissolves the solute
  2. The substance that is dissolved
  3. The solid left after filtration
  4. The liquid collected after condensation

Question 15

How is a solution with pH 7 classified?
  1. Neutral
  2. Strongly acidic
  3. Weakly acidic
  4. Strongly alkaline

Question 16

Which method separates oil from water?
  1. A separating funnel
  2. Paper chromatography
  3. Simple distillation
  4. Evaporation to dryness

Question 17

What is a pure substance?
  1. One element or one compound
  2. Two elements mixed in any proportion
  3. A compound dissolved in water
  4. Several compounds blended together

Question 18

What does a sharp melting point usually indicate?
  1. A pure substance
  2. A mixture of substances
  3. An impure metal sample
  4. A solution containing a solute

Question 19

Which mixture can filtration separate?
  1. Sand and water
  2. Salt dissolved in water
  3. Ethanol mixed with water
  4. Two gases mixed together

Question 20

What can evaporation obtain from a solution?
  1. The dissolved solid
  2. The collected solvent
  3. An insoluble residue
  4. A mixture of gases

Question 21

Which mixture can simple distillation separate?
  1. Water from salt solution
  2. Sand from water
  3. Iron from sulfur
  4. Dyes in black ink

Question 22

What is crystallisation used to obtain?
  1. Pure solid crystals from a solution
  2. An insoluble solid by filtration
  3. A solvent collected by distillation
  4. Dyes separated on paper

Question 23

What is the residue in filtration?
  1. Insoluble solid left on the filter paper
  2. Liquid that passes through the filter paper
  3. Dissolved solid carried through the filter
  4. Water used to wash the filter paper

Question 24

What is the filtrate in filtration?
  1. Liquid that passes through the filter paper
  2. Insoluble solid left on the filter paper
  3. Filter paper after it has dried
  4. Mixture before it enters the filter

Question 25

Which process spreads particles from high to low concentration?
  1. Diffusion
  2. Evaporation
  3. Condensation
  4. Filtration

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Review Mixtures and Analysis questions for Chemistry, with correct answers shown and coverage across the meaning of a pure substance; mixtures, solutions and dissolving; diffusion in terms of particles.

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