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1. Which of the following is/are components of a phase?
a) Brass, Copper, Zinc
b) Copper only
c) Zinc only
d) Both Copper and Zinc

View Answer

Answer: d [Reason:] Components are pure metals and/or compounds of which an alloy is composed. Brass is an alloy and Copper and zinc are components.

2. At certain temperature the maximum concentration of solute atoms that dissolve in solvent to form solid solution, this condition is called __________
a) Solubility
b) Formation of phase
c) Solubility limit
d) Formation of super saturated solution

View Answer

Answer: c [Reason:] At this limit there will maximum solubility o solution and solution formed is saturated above this there will be formation of super saturated solution.

3. Analyze the following graph and the following question regarding solubility of sugar in water.
materials-science-questions-answers-quiz-q3
a) Decrease with increase in temperature
b) Increase with increase in temperature
c) Increase with decrease in temperature
d) Remains constant with increase or decrease in temperature

View Answer

Answer: b [Reason:] The solubility of sugar increases when the solution is heated.

4. What is a phase?
a) The substance which is physically distinct
b) The substance which is homogenouschemically
c) The substance which is both physically distinct and chemically homogenous
d) The substance which is both physically distinct and chemically heterogeneous

View Answer

Answer: c [Reason:] A phase can be defined as a physically distinct and homogeneouschemically portion of a system that has a particular chemical composition and structure.

Analyze the following diagram in which A pure solid substance is heatedand answer the following questions
materials-science-questions-answers-quiz-q5

5. On which portion(s) only gas is present?
a) 1
b) 4
c) 5
d) 4, 5

View Answer

Answer: c [Reason:] In the figure pure substances exists at 1,3,5 out of which 1 is given solid so 5 is pure gas.

6. On which portion(s) liquid is present?
a) 2, 3
b) 2, 4
c) 3, 4
d) 2, 3, 4

View Answer

Answer: d [Reason:] From figure in process 2 the substance solid is being converted to liquid. In 3 only pure liquid exists. In 4 liquid is converting into solid.

7. On which portions only pure substance are present?
a) 1, 3, 5
b) 1, 5
c) only 1
d) 3, 5

View Answer

Answer: a [Reason:] Since pure substances like only solid, liquid, gas exists at 1, 3, 5.

8. In which portion there is freezing section?
a) 1
b) 2
c) 3
d) 4

View Answer

Answer: b [Reason:] Since this is a warming curve, this sectionindicates the melting temperature, but freezing point isidentical to melting temperature.

9. Which portion of graph indicates boiling point?
a) 2
b) 3
c) 4
d) 5

View Answer

Answer: c [Reason:] In this point the substance is converted from liquid to gas.

10. On which section(s) of the graph would you use the formula, (Specific Heat) * (Mass) * (Change in temperature), to calculate the energy change.
a) 2
b) 1, 3
c) 1, 3, 5
d) 2, 3, 5

View Answer

Answer: c [Reason:] Since the phase of substance remains constant and there is change in temperature of substance.

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