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- 1. Multiple Choice
Air is regarded as a mixture because:
Its pressure may very
Its pressure may very
Its volume changes under different conditions
Its composition may vary
- 2. Multiple Choice
White gold is used in jewelry and contains two elements, gold and palladium. A jeweler has two different samples that are both identical in appearance and have a uniform composition throughout. What can be said about the samples?
They are homogeneous mixtures and be classified as metallic alloys.
The materials are heterogeneous mixtures and can be classified by their components
The samples have variable compositions and are classified as metallic solutions.
The samples are heterogeneous mixtures that can be separated using magnetic properties.
- 3. Multiple Choice
Tyndall effect means
Rays scattered by dust particles
Rays travelling from one medium to other
Rays undergoing Refraction
Rays undergoing totally reflected
- 4. Multiple Choice
concentration of 36g of NaCl in 100 g of water is
23%
26.47%
29.32%
21.11%
- 5. Multiple Choice
How would O2 be qualified. Check all answers that apply.
Atom
Molecule
Compound
- 6. Multiple ChoiceThe beginning substances in a chemical reaction are called...reactantsproducts
- 7. Multiple Choice
The amount of solute present per unit volume or per unit mass of the solution/solvent is known as
(a) Composition of solute
(b) Concentration of a solvent
(c) Concentration of a solute
(d) Concentration of a solution
- 8. Multiple ChoiceSugar water is asolutionsuspensioncolloid
- 9. Multiple ChoiceMilk is asolutionsuspensioncolloid
- 10. Multiple Choice
Shaving foam is which type of colloid solution
Sol
Foam
Aerosol
None of these
- Answer choicesTagsAnswer choicesTags