This is the Multiples Choice Questions Part 6 of the Series in General chemistry as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.
Online Questions and Answers in General Chemistry Series
Following is the list of multiple choice questions in this brand new series:
Continue Practice Exam Test Questions Part VI of the Series
Choose the letter of the best answer in each questions.
251. What acid is used in the batteries of cars or automobiles?
- A. Carbonic acid
- B. Acetylsalicylic acid
- C. Sulfuric acid
- D. Phosphoric acid
252. Bases are compounds consisting of:
- A. metal and oxide ion
- B. nonmetal and oxide ion
- C. metal and hydroxide ion
- D. nonmetal and hydroxide ion
253. Which base is used to remove carbon dioxide from air?
- A. Lithium hydroxide
- B. Sodium hydroxide
- C. Aluminum hydroxide
- D. Magnesium hydroxide
254. What base is used as an antacid with no dosage restriction?
- A. Magnesium hydroxide
- B. Sodium hydroxide
- C. Aluminum hydroxide
- D. Lithium hydroxide
255. Magnesium hydroxide is a base used as antacid if consumed in small amounts and laxative if consumed in large dosage. What is common term for magnesium hydroxide?
- A. Skim if Magnesia
- B. Oil of Magnesia
- C. Cream of Magnesia
- D. Milk of Magnesia
256. What is the most convenient way of expressing hydronium ion concentration?
- A. Hydrometer reading
- B. pH scale
- C. Alkalinity
- D. Basicity
257. Who proposed the pH scale in 1909?
- A. Albert Einstein
- B. J. Williard Gibbs
- C. Henri Hess
- D. Soren Sorensen
258. What does the symbol pH stands for?
- A. The power of the hydroxide compound
- B. The power of the hydroxide ion
- C. The power of the hydrogen ion
- D. The power of hydrogen
259. What is the pH of pure water?
- A. 6.1
- B. 6.5
- C. 7
- D. 7.4
260. Which two substances have the same pH, which is 6.5?
- A. Saliva and milk
- B. Orange juice and tomato juice
- C. Vinegar and calamansi juice
- D. Urine and apple juice
261. Which is most acidic?
- A. Vinegar
- B. Calamansi juice
- C. Carbonated drink
- D. Orange juice
262. Which is the best description of strong acids?
- A. They dissociate or ionize completely in water.
- B. They don’t dissociate or ionize completely in water.
- C. They are normally found in vinegars.
- D. They are the acids that do not contain hydrogen.
263. Which is the best description of weak acids?
- A. They dissociate or ionize completely in water.
- B. They don’t dissociate or ionize completely in water.
- C. They are normally found in hydrogen chloride form.
- D. They are the acids that not found in vinegars.
264. What is a measure of the H30+ concentration of a solution?
- A. pH
- B. pOH
- C. indicator
- D. OH-
265. What is a measure of the OH- concentration of a solution?
- A. pH
- B. pOH
- C. Indicator
- D. H30+
266. What is the pH of a neutral solution?
- A. 5
- B. 6
- C. 7
- D. 8
267. Which of the following pH is the most basic?
- A. pH 8
- B. pH 9
- C. pH 11
- D. pH 13
268. What is the substance that changes color at a certain pH range?
- A. Litmus paper
- B. Indicator
- C. Balancer
- D. Lichen
269. What refers to the reaction between an acid and a base forming salt and water?
- A. Neutralization
- B. Titration
- C. Hydrolysis
- D. Buffer
270. What is the process of measuring the concentration of an acid or base in one solution by adding a base or acid solution of known concentration until the acid or base in the solution of unknown concentration is fully neutralized?
- A. Neutralization
- B. Titration
- C. Hydrolysis
- D. Buffer
271. What refers to the point at which the added base or acid solution in titration is enough to fully neutralize the acid or base?
- A. Neutral point
- B. Titrant point
- C. Central point
- D. Equivalence point
272. What refers to the reaction between the ions of a salt and the ions of water?
- A. Salt titration
- B. Salt buffering
- C. Salt neutralization
- D. Salt hydrolysis
273. What is a solution consisting of a weak acid and its conjugate base, or of a weak base and its conjugate aid?
- A. Seawater
- B. Salt
- C. Buffer
- D. Aqueous solution
274. What is the most common chemical reaction, which is the reaction of materials with oxygen accompanied by the giving off of energy in the form of heat?
- A. Combustion
- B. Exothermic reaction
- C. Endothermic reaction
- D. Kinetic reaction
275. What is the area of chemistry that concerns with the rate at which chemical reactions occur?
- A. Chemical collision theory
- B. Chemical dynamics
- C. Chemical kinematics
- D. Chemical kinetics
276. What is the minimum amount of energy need for a chemical reaction to occur called?
- A. Initial energy
- B. Activation energy
- C. Ignition energy
- D. Catalystic energy
277. If the energy is released as the reaction occurs, it is a _____ reaction.
- A. instantaneous
- B. spontaneous
- C. exothermic
- D. endothermic
278. If the energy is absorbed during the reaction, it is a _____ reaction.
- A. instantaneous
- B. spontaneous
- C. exothermic
- D. endothermic
279. What is a substance that, when added to a reaction mixture, increases the rate of the reaction but is itself unchanged after the reaction is done?
- A. Hydroxide ions
- B. Accelerations
- C. Catalyst
- D. Neutral substance
280. What is a substance that slows down a chemical reaction?
- A. Inhibitors
- B. Retardant
- C. Catalyst
- D. Decelerators
281. How are catalysts classified?
- A. Homogeneous and heterogeneous
- B. Slow and fast
- C. Pure and composite
- D. Acidic and basic
282. What type of catalyst exists in the same phase as the reactants in a reaction mixture?
- A. Homogeneous catalyst
- B. Heterogeneous catalyst
- C. Pure catalyst
- D. Composite catalyst
283. What type of catalyst exists in separate phase as the reactants in the reaction mixture?
- A. Homogeneous catalyst
- B. Heterogeneous catalyst
- C. Pure catalyst
- D. Composite catalyst
284. Most heterogeneous catalyst are ________.
- A. liquids
- B. solids
- C. gases
- D. plasma
285. Which one is a factor that affects the rate of chemical reactions?
- A. Temperature
- B. Concentration and surface area of reactants
- C. Presence of a catalyst
- D. All of the above
286. What refers to the state at which the rates of the forward and backward reactions are equal?
- A. Chemical equilibrium
- B. Reversible equilibrium
- C. Reaction equilibrium
- D. Haber equilibrium
287. What is the study of heat formed or required by the chemical reaction?
- A. Stoichemistry
- B. Thermochemistry
- C. Thermodynamics
- D. Enthalpy
288. What is the ratio of the equilibrium concentration of the products to the equilibrium concentration reactants with each species concentration raised to the corresponding stoichemistric coefficient found in the balanced reaction?
- A. Equilibrium constant
- B. Equilibrium concentration
- C. Chemical equilibrium
- D. Reaction quotient
289. What term is used as a qualitative description of the extent of a chemical reaction?
- A. Equilibrium position
- B. Chemical equilibrium
- C. Equilibrium
- D. Reaction equilibrium
290. What quantity is used to determine how far from equilibrium the chemical reaction is?
- A. Reaction index
- B. Chemical quotient
- C. Equilibrium quotient
- D. Reaction quotient
291. What states that if a change in conditions is imposed on a system at equilibrium, the equilibrium position will shift in the direction that tends to reduce the effects of that change?
- A. Hess’ principle
- B. Catalyst effect
- C. Haber process principle
- D. Le Chateller’s principle
292. What refers to the reaction of oxygen with an element or compound?
- A. Reduction
- B. Oxidation
- C. Oxygenation
- D. Oxygenization
293. The loss of electron by a substance is known as ___________.
- A. oxidation
- B. covalent process
- C. reduction
- D. ionic process
294. The gain of electrons by a substance is known as ___________.
- A. oxidation
- B. covalent process
- C. reduction
- D. ionic process
295. What represents the charge that the atom would have if the electrons in each bond belonged entirely to the more electronegative atom?
- A. Oxidation number
- B. Atomic number
- C. Atomic weight
- D. Electron affinity
296. A reduced substance is what type of agent?
- A. Oxidizing agent
- B. Redox agent
- C. Reducing agent
- D. Nonredox agent
297. The oxidized substance is what type agent?
- A. Oxidizing agent
- B. Redox agent
- C. Reducing agent
- D. Nonredox agent
298. What reaction does not involve any change in oxidation number?
- A. Redox reaction
- B. Nonredox reaction
- C. Reducing reaction
- D. Oxidizing reaction
299. What is an apparatus that uses a spontaneous redox reaction to generate electricity?
- A. Voltaic cell
- B. Fuel cell
- C. Lead cell
- D. Nickel cadmium cell
300. What is a branch of chemistry which is the study of carbon-containing molecules known as organic compounds?
- A. Organic chemistry
- B. Inorganic chemistry
- C. Stoichemistry
- D. Biochemistry
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