Which of the following is an example of a chemical change? Question 7 options: iodine sublimating...

Which of the following is an example of a chemical change?

Question 7 options:

	iodine sublimating
	alcohol boiling
	sodium chloride melting
	silver tarnishing
	sucrose dissolving

Expert Solution

a) Iodine sublimation: sublimation is a process where the solids evaporate directly without passing through the liquid state.
In this process, there is only physical change occurs. No chemical reaction.
Hence, it is not a chemical reaction.

b) alcohol boiling: This process is also a physical process. Here, the alcohol changing from liquid to gaseous state.

Hence, it is also not a chemical reaction.

c) Sodium chloride melting: Here also the solid sodium chloride changing its state to a liquid. This process is a physical process.
Hence, it is also not a chemical reaction.

d) Silver tarnishing: Tarnishing is a chemical process where silver reacts with the sulphur in the air to form silver sulphide.
Since the Silver is reacting with sulphur to form new chemical silver sulphide, this process is a chemical process.
Hence, it is a chemical reaction.

e) Sucrose dissolving: sucrose dissolving is also physical change because there is no net change in the sucrose molecule.
The sucrose molecule in solid form is same to that of dissolved form.
Hence, it is a physical change.

Therefore, silver tarnishing is only one chemical in the above options.

queen_honey_blossom answered 2 years ago

Choose correct answers: Which of the following are true of nuclear receptors? Question 7 options: A...

Choose correct answers: Which of the following are true of nuclear receptors? Question 7 options: A initially in cytoplasm and transition to nucleus B are often bound by steroid hormones C are often bound by peptide signals like insulin D act as G coupled proteins E act as transcription factors F always found in the nucleus G are likely to have effects within seconds H are likely to have effects within hours I increase concentrations of secondary messengers J alter...

Which of the following statements is true when describing Positive Predictive Value? Question 7 options: A)...

Which of the following statements is true when describing Positive Predictive Value? Question 7 options: A) It tells you the probability that a test reflects a person who has the disease. B) It is a constant measurement of a test, regardless of the population it is used on. C) It is the ability of a test to correctly identify people who have the disease you are testing for. D) It increases when prevalence of the disease within your population.decreases. Negative...

Which of these would be associated with perfect competition in a market? Question 7 options: a)...

Which of these would be associated with perfect competition in a market? Question 7 options: a) a market in which firms sell their product at the market equilibrium price b) a market in which firms are impacted significantly by the actions of the other firms c) a market with many sellers, with each producing a similar though not identical version of a product d) a market with high costs of entry into the industry The long-run industry supply curve is...

Which of the following is not an example of a chemical hazard? toxic by-products, such as...

Which of the following is not an example of a chemical hazard? toxic by-products, such as vapors and fumes, caused by mixing incompatible materials skin irritation, disfiguring burns, eye injury or blindness caused by corrosive products pressure build up in a closed system has the potential for explosion/implosion injury from exploding containers, such as spray cans

Which situation is least likely to be an example of labor discrimination? Question 18 options: a)...

Which situation is least likely to be an example of labor discrimination? Question 18 options: a) a restaurant that hires only young female servers b) women earning less money in a career that offers flexible work hours c) senior citizens finding difficulty in pursuing new careers d) employers screening out candidates based on candidates' names A monopsony hires workers up to the point at which the: Question 19 options: a) wage exceeds the VMP. b) wage equals the VMP. c)...

In which section of the small intestine does the most chemical digestion take place? Question options:...

In which section of the small intestine does the most chemical digestion take place? Question options: Jejunum Ileum Duodenum Pylorus Cecum Which type of cell lines the stomach? Question options: Simple cuboidal epithelial cells Simple columnar epithelial cells Pseudostratified columnar epithelial cells Stratified columnar epithelial cells Simple squamous epithelial cells Which of the following is not associated with Mechanical Digestion? Question options: The teeth Physical break down of food Enzymes breaking down food Chewing and grinding of food Mastication The...

Which of the following is an example of a chemical property? all of the above specific...

Which of the following is an example of a chemical property? all of the above specific heat boiling point combustion hardness

In which of the following cases is the sign of the entropy change (ΔS) positive? options:...

In which of the following cases is the sign of the entropy change (ΔS) positive? options: 2 KCl(g) + 3 O2(g) --> 2 KClO3(s) 2 HgO(s) --> 2 Hg(l) + O2(g) 4 NH3(g) + 7 O2(g) --> 4 NO2(g) + 6 H2O(g) 2 H2S(g) + SO2(g) --> 3 S(s) + 2 H2O(g) 2 Na(s) + Cl2(g) --> 2 NaCl(s)

Which is an example of a Qualified Terminable Interest Property (QTIP) property? Question 5 options: A...

Which is an example of a Qualified Terminable Interest Property (QTIP) property? Question 5 options: A life insurance policy with a one-time lump sum payment to the surviving spouse An automobile A homestead A trust with a life interest to the surviving spouse and remainder to the children Question 6 (2 points) Which is NOT a way in which an estate planner can use trusts to benefit family members? Question 6 options: Identify the estate assets and the beneficiaries who...

Which of the following was NOT listed as a type of transformation? Question 1 options: Storage...

Which of the following was NOT listed as a type of transformation? Question 1 options: Storage Re-purposing Alteration Transportation Processes that use numbers, statistics and mathematical models to plan, monitor and adjust production. Question 2 options: KPIs Qualitative Methods Financial Modeling Quantitative Methods Which of the following is NOT a forecasting technique discussed in your reading? Question 4 options: Weighted Averages Weighted Moving Averages PERT Exponential Smoothing Which of the following statements about simulations is NOT accurate? Question 5 options:...

Question