Q: What is an ion that is in common to both salts in a solution? Read this paragraph and choose the correct option from the provided answers: This situation describes the common ion effect. A common ion is an ion that is in common to both salts in a solution. In the above example, the common ion is Ca 2+ . The common ion effect is a decrease in the solubility of an ionic compound as a result of the addition of a common ion. Adding calcium ion to the saturated solution of calcium sulfate causes additional CaSO 4 to precipitate from the solution, lowering its solubility. The addition of a solution containing sulfate ion, such as potassium sulfate, would result in the same common ion effect. Choices: - regular ion - strong ion - native ion - common ion A:
common ion

(Question)
Q: What is the name of the iron-containing oxygen-transport protein in the red blood cells of all vertebrates? Read this paragraph and choose the correct option from the provided answers: Hemoglobin is the iron-containing oxygen-transport protein in the red blood cells of all vertebrates. The hemoglobin molecule is an assembly of four globular protein subunits, each tightly associated with a non-protein heme group. The heme group binds to the iron ion. The most common hemoglobin is hemoglobin A, a tetramer consisting of two alpha and two beta subunits, denoted as 22. Choices: - plasma - platelet - ferric acid - hemoglobin A:
(Answer)
hemoglobin

Ques: Q: What is the process for developing knowledge called? Read this paragraph and choose the correct option from the provided answers: Science is a process for developing knowledge. Change in knowledge about the natural world is expected because there is often room for new observations which may challenge current views. No matter how well one theory explains a set of observations, it is possible that a different theory may explain them just as well or better, or may also encompass a wider range of observations. Scientists are always testing and attempting to improve theories. Scientists know that even if there is no way to gain complete knowledge about something, an increasingly accurate understanding of nature will develop over time. Choices: - evolution - theory - creationism - science A:
Ans: science

(Q).
Q: The mass of the objects and the distance between them affect the strength of what universal force? Read this paragraph and choose the correct option from the provided answers: All objects in the universe have a gravitational attraction to each other ( Figure below ). The strength of the force of gravity depends on two things. They are the mass of the objects and the distance between them. The greater the objects' mass, the greater the force of attraction. As the distance between the objects increases, the force of attraction decreases. Choices: - states of matter - weight - motion - gravity A:
(A).
gravity

Ques:Q: What are gymnosperms lacking compared to most angiosperms? Read this paragraph and choose the correct option from the provided answers: Choices: - muscle elements - use elements - vascular elements - vessel elements A:

Ans:vessel elements

Question: Q: Gain or loss of what causes an atom to become a negatively or positively charged ion? Read this paragraph and choose the correct option from the provided answers: The girl pictured above became negatively charged because electrons flowed from the van de Graaff generator to her. Whenever electrons are transferred between objects, neutral matter becomes charged. This occurs even with individual atoms. Atoms are neutral in electric charge because they have the same number of negative electrons as positive protons. However, if atoms lose or gain electrons, they become charged particles called ions. You can see how this happens in the Figure below . When an atom loses electrons, it becomes a positively charged ion, or cation. When an atom gains electrons, it becomes a negative charged ion, or anion. Choices: - protons - neutrons - nucleus - electrons A:
Answer:
electrons