(A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true but the second is false, and (D) if the first sentence is false but the second is true. 1. Phenolphthalein is a weak acid that is naturally pink. Rheology is the science that deals with the flow of fluids and the deformation of solids. 2. In the experiment on the rusting of metals, the ferricyanide’s blue coloration is an indication that no chemical reaction occurred after its use. Prussian blue is the color produced by the reaction of ferricyanide with the phenolphthalein.
Ideal and Real Gases
Ideal gases obey conditions of the general gas laws under all states of pressure and temperature. Ideal gases are also named perfect gases. The attributes of ideal gases are as follows,
Gas Laws
Gas laws describe the ways in which volume, temperature, pressure, and other conditions correlate when matter is in a gaseous state. The very first observations about the physical properties of gases was made by Robert Boyle in 1662. Later discoveries were made by Charles, Gay-Lussac, Avogadro, and others. Eventually, these observations were combined to produce the ideal gas law.
Gaseous State
It is well known that matter exists in different forms in our surroundings. There are five known states of matter, such as solids, gases, liquids, plasma and Bose-Einstein condensate. The last two are known newly in the recent days. Thus, the detailed forms of matter studied are solids, gases and liquids. The best example of a substance that is present in different states is water. It is solid ice, gaseous vapor or steam and liquid water depending on the temperature and pressure conditions. This is due to the difference in the intermolecular forces and distances. The occurrence of three different phases is due to the difference in the two major forces, the force which tends to tightly hold molecules i.e., forces of attraction and the disruptive forces obtained from the thermal energy of molecules.
(A) if both sentences are true,
(B) if both sentences are false,
(C) if the first sentence is true but the second is false, and
(D) if the first sentence is false but the second is true.
1. Phenolphthalein is a weak acid that is naturally pink.
Rheology is the science that deals with the flow of fluids and the deformation of solids.
2. In the experiment on the rusting of metals, the ferricyanide’s blue coloration is an indication that no
Prussian blue is the color produced by the reaction of ferricyanide with the phenolphthalein.
3. When steel is continuously and consistently exposed to air, oxygen, and water, aluminum oxides will be formed on its surface.
In the Philippines’ old coins, the metal commonly found in all of the coin denominations is nickel.
4. Galvanized steel is steel coated with tin.
A
5. Corrosion is the same as rusting, and these terms may be used to refer to the wearing away of all metals by the action of air, water, and salt water.
The unit of P in the formula for the flexural strength of materials is meters.
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