Multiple Choice Questions
Multiple Choice Questions
Q.1. Which of the following will show “Tyndall effect” ?
(a) Salt solution
(b) Sugar solution
(c) Soap solution
(d) Copper sulphate solution
Q.2. What happens when a saturated solution is cooled ?
(a) It becomes unsaturated
(b) It remains unaffected
(c) It becomes supersaturated
(d) It becomes transparent
Q.3. Which of the following is a compound ?
(a) Air
(b) Water
(c) Soda water
(d) Pond water
Q.4. Which of the following is an element ?
(a) Oxygen gas
(b) Carbon dioxide gas
(c) Sulphur dioxide gas
(d) Nitrogen dioxide gas
05. Which of the following is a homogeneous mixture ?
(a) Soda water
(b) Copper sulphate solution
(c) Starch solution
(d) Sodium chloride solution
Q.6. Which of the following materials fall in the category of a “pure substance” ?
(a) Ice, milk and iron
(b) CaO, CO₂an d NaCl
(c) Brick, mercury and wood
(d) Iron, Cao and air
Q.7. Which of the following is an aqueous solution ?
(a) Sulphur in carbon disulphide
(b) Iodine in carbon tetrachloride
(c) Sodium chloride in water
(d) Iodine in alcohol
Q.8. The substances that sublime can be made to liquefy by:
(a) Heating them under pressure
(b) Heating them at low pressure
(c) Cooling them under pressure
(d) Cooling them at low pressure
Q.9. The substances that sublime easily are:
(a) Petrol, acetone, camphor, iodine and solid CO2
(b) Iodine, solid CO2, ammonium chloride, kerosene and diesel
(c) Iodine, camphor, ammonium chloride, anthracene and naphthalene
(d) Iodine, acetone, camphor, petrol and naphthalene
Q.10. Chromatography is the technique which is used for separation of those solutes that:
(a) Dissolve in the same solvent
(b) Get adsorbed to different extremes
(c) Get absorbed at the same speed
(d) Are soluble in aqueous medium
Q.11. 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
(a) (1) and (ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (ii) and (iii)
Q.12. Rusting of an article made-up of iron is called :
(a) Corrosion and it is a physical as well as chemical change
(b) Dissolution and it is a physical change
(c) Corrosion and it is a chemical change
(d) Dissolution and it is a chemical change
Q.13. A mixture of sulphur and carbon disulphide is :
(a) Heterogeneous and shows Tyndall effect
(b) Homogeneous and shows Tyndall effect
(c) Heterogeneous and does not show Tyndall effect
(d) Homogeneous and does not show Tyndall effect
Q.14. Tincture of iodine has antiseptic properties. This solution is made by dissolving:
(a) Iodine in potassium iodide
(b) Iodine in vaseline
(c) Iodine in water
(d) Iodine in alcohol
Q.15. Which of the following are homogeneous in nature?
(i) Ice (ii) Wood (iii) Soil (iv) Air
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (iv)
(d) (iii) and (iv)
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