Name a technique used to separate carbon and sulphur.
  • Sublimation
  • Filtration
  • Distillation
  • Magnetic
Two chemical substances X and Y combine together to form a product P which contains both X and Y. X + Y → P. X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following statements concerning X, Y and P are correct? i. P is a compound. ii. X and Y are compound. iii. X and Y are elements. iv. P has a fixed composition.
  • (i), (ii) and (iii)
  • (i), (ii) and (iv)
  • (ii), (iii) and (iv)
  • (i), (iii) and (iv)
Which of the following are chemical changes? i. Decaying of wood. ii. Burning of wood. iii. Sawing of wood. iv. Hammering of nail into wood.
  • (i) and (ii)
  • (ii) and (iii)
  • (iii) and (iv)
  • (i) and (iv)
Which of the following are physical changes? i. Melting of iron metal. ii. Rusting of iron metal. iii. Bending of an iron rod. iv. Drawing wire of iron metal.
  • (i), (ii) and (iii)
  • (i), (ii) and (iv)
  • (i), (iii) and (iv)
  • (ii), (iii) and (iv)
Which of the following statements are true for pure substances? i. Pure substances contain only one kind of particles. ii. Pure substances may be compounds or mixtures. iii. Pure substances have the same composition throughout. iv. Pure substances can be exemplified by all elements other than nickel.
  • (i) and (ii)
  • (i) and (iii)
  • (iii) and (iv)
  • (ii) and (iii)
What is the technique used to separate components of ink?
  • Filtration
  • Distillation
  • Sublimation
  • Chromatography
Which is the most effective method of separating mixtures of miscible volatile liquids?
  • Fractional distillation
  • Hand picking
  • Chromatography
  • Filtration
Which of the following is a separation technique to separate potassium chloride and ammonium chloride?
  • Distillation
  • Evaporation
  • Condensation
  • Sublimation
Which of the following is not an emulsion?
  • Milk
  • Butter
  • Face cream
  • Shaving cream
Which of the following is separation technique to separate kerosene oil, water and salt?
  • Funnel separation
  • Evaporation
  • Distillation
  • All of these
Which of the following mixture cannot be separated by using water as the solvent?
  • Copper sulphate and sand
  • Sand and potash alum
  • Sand and sulphur
  • Sugar and sand
Which of the following represents the solubility of sugar in water at 20°C?
  • 21 g
  • 204 g
  • 37 g
  • 164 g
Which one is true solution?
  • Sugar sol
  • Blood
  • Starch
  • Ink
Which one of the following is a suspension?
  • Mud in water
  • Saltwater
  • Blood
  • None of these
Which one of the following is most likely to exhibit Tyndall effect?
  • Sugar and water mixture
  • Potash alum and water mixture
  • Chalk powder and water mixture
  • Potassium permanganate and water mixture
Which one of the following is not a chemical change?
  • Formation of curd
  • Ripening of banana
  • Sublimation of naphthalene
  • Corrosion of photo frame
Which one of the following is not a property of solution:
  • Solution is a homogeneous mixture
  • Solution does not scatter light
  • Path of light is visible in solution
  • Solute particles do not settle down when left undisturbed
Which one of the following is not a solution:
  • Brass
  • Lemonade
  • Saltwater
  • Milk
White gold used in jewellery contains two elements, gold and palladium. A jeweller has two different samples that are both identical in appearance and have a uniform composition throughout. What can be said about the samples?
  • The materials are heterogeneous mixtures and can be classified by their components
  • These are homogeneous mixture and can be classified as metallic alloys.
  • The samples have variable compositions and are classified as metallic solutions.
  • The samples are heterogeneous mixtures that can be separated by using magnetic properties.
You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture?
  • Evaporation
  • Simple distillation
  • Fractional distillation
  • Crystallization
Which of the following is an heterogenous mixture?
  • salt solution
  • sand and water suspension
  • Kola Champagne
  • bronze
Dyes in water soluble markers may be separated by means of
  • Simple distillation
  • Crystallisation
  • Chromatography
  • Filtration
Which of the following techniques is used to separate the components of a solution?
  • filtration
  • decantation
  • evaporation
  • physical manipulation
What is the basis for separating the components of a mixture through distillation?
  • freezing point of the substances
  • room temperature
  • decaying period
  • boiling pint of the substances
Charcoal powder is insoluble in water. When water is filtered, the charcoal powder becomes the _______.
  • solute
  • residue
  • filtrate
  • solvent
What are the three types of mixtures?
  • Suspension, colloid and solution
  • Solution, solute and solvent
  • Colloid, insoluble and soluble
  • Distillate, colloid and suspension
Which part of a filtration is the "filtrate"?
  • The filter paper
  • The solid material left in the funnel
  • The liquid that has gone through
  • The conical flask
If something is insoluble in water, it will not...
  • Separate after distillation
  • Dissolve in water
  • Dissolve in anything except water
  • Separate after filtration
Which tool could you use to separate large and small particles?
  • A sieve
  • A distillation flask
  • Chromatography
  • Evaporating basin
In a salt water solution ...
  • Salt is the solute and water is the solvent
  • Salt is the solvent and water is the solute
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