Chemistry - Acids and Bases
MCQS
A. 7
B. 0
C. 14
D. 1
The pH of a neutral solution is 7.
A. 7
B. 0
C. 14
D. 1
The pH of a neutral solution is 7.
A. 7
B. 0
C. 14
D. 1
The pH of pure water at 25°C is 7.
A. HCl
B. H₂SO₄
C. HNO₃
D. H₃PO₄
The chemical formula of hydrochloric acid is HCl.
A. HCl
B. CH₃COOH
C. H₂CO₃
D. HNO₂
Hydrochloric acid (HCl) is a strong acid.
A. H⁺ (Hydrogen ion)
B. OH⁻ (Hydroxide ion)
C. Cl⁻ (Chloride ion)
D. Na⁺ (Sodium ion)
The presence of H⁺ ions makes a solution acidic.
A. Sulfuric acid
B. Nitric acid
C. Hydrochloric acid
D. Acetic acid
The compound with the formula H2SO4 is sulfuric acid.
A. Basic
B. Neutral
C. Acidic
D. Alkaline
A solution with a pH of 10 is considered basic.
A. NH₃ (Ammonia)
B. KOH (Potassium hydroxide)
C. NaOH (Sodium hydroxide)
D. Ca(OH)₂ (Calcium hydroxide)
Ammonia (NH₃) is a weak base.
A. 0 to 6
B. 7 to 14
C. 0 to 14
D. 8 to 14
The pH range of acidic solutions is 0 to 6.
A. Citric acid
B. Acetic acid
C. Sulfuric acid
D. Hydrochloric acid
Citric acid is found in citrus fruits like lemons and oranges.
A. Neutralization
B. Oxidation
C. Reduction
D. Ionization
The reaction between an acid and a base is known as neutralization.
A. Lye
B. Baking soda
C. Vinegar
D. Milk of magnesia
Aqueous sodium hydroxide is commonly known as lye.
A. NaOH (Sodium hydroxide)
B. NH₄OH (Ammonium hydroxide)
C. KOH (Potassium hydroxide)
D. CH₃COOH (Acetic acid)
Sodium hydroxide (NaOH) is a strong base.
A. Hydrogen ions (H⁺)
B. Hydroxide ions (OH⁻)
C. Sodium ions (Na⁺)
D. Chloride ions (Cl⁻)
The pH scale is a measure of the concentration of hydrogen ions (H⁺).
A. Decreases
B. Increases
C. Remains constant
D. Becomes neutral
The pH of a solution decreases when it becomes more acidic.
A. Hydrochloric acid (HCl)
B. Sulfuric acid (H₂SO₄)
C. Nitric acid (HNO₃)
D. Phosphoric acid (H₃PO₄)
Hydrochloric acid is produced in the stomach to aid digestion.
A. Red
B. Blue
C. Green
D. Yellow
Litmus paper turns red in the presence of an acid.
A. Bitter taste
B. Turns blue litmus paper red
C. Releases H⁺ ions
D. Low pH
Bases often have a bitter taste.
A. Acetic acid (CH₃COOH)
B. Hydrochloric acid (HCl)
C. Sulfuric acid (H₂SO₄)
D. Nitric acid (HNO₃)
Acetic acid (CH₃COOH) is a weak acid.
A. Acidic
B. Neutral
C. Basic
D. Alkaline
A solution with a pH of 3 is considered acidic.
A. Hydrochloric acid
B. Muriatic acid
C. Nitric acid
D. Sulfuric acid
The common name for hydrochloric acid (HCl) gas dissolved in water is muriatic acid.
A. 8 to 14
B. 0 to 6
C. 0 to 14
D. 7 to 14
The pH range of basic solutions is 8 to 14.
A. Sour taste
B. Sweet taste
C. Slimy feel
D. None of the above
A common property of acids is a sour taste.
A. Hydrogen gas
B. Oxygen gas
C. Carbon dioxide
D. Nitrogen gas
The reaction between an acid and a metal produces hydrogen gas.
A. 7
B. 0 to 6
C. 8 to 14
D. 1 to 7
The pH range of neutral solutions is 7.
A. Hydrochloric acid (HCl)
B. Acetic acid (CH₃COOH)
C. Citric acid
D. Carbonic acid (H₂CO₃)
Hydrochloric acid (HCl) is a strong acid used in laboratories.
A. Baking soda
B. Bleaching powder
C. Table salt
D. Borax
Sodium bicarbonate (NaHCO₃) is commonly known as baking soda.
A. Sodium hydroxide (NaOH)
B. Ammonium hydroxide (NH₄OH)
C. Potassium hydroxide (KOH)
D. Acetic acid (CH₃COOH)
Sodium hydroxide (NaOH) is a strong base used in household products.
A. 12
B. 2
C. 4
D. 6
The pH of a solution with a hydrogen ion concentration of 1 x 10⁻¹² M is 12.
A. Bitter taste
B. Sour taste
C. Red litmus turns blue
D. Releases H⁺ ions
A property of bases is that they turn red litmus paper blue.
A. 7.4
B. 6.5
C. 8.2
D. 5
The pH of human blood is typically around 7.4.
A. 6
B. 8
C. 10
D. 12
The pH of a solution with a hydroxide ion concentration of 1 x 10⁻⁸ M is 8.
A. Amphoteric
B. Neutral
C. Amphipathic
D. Amorphous
A substance that can act as both an acid and a base is called amphoteric.
A. Vinegar acid
B. Citrus acid
C. Tartaric acid
D. Lactic acid
Acetic acid (CH₃COOH) is commonly known as vinegar acid.
A. Acidity or alkalinity
B. Temperature
C. Density
D. Volume
The pH of a solution is a measure of its acidity or alkalinity.
A. Hydrochloric acid (HCl)
B. Acetic acid (CH₃COOH)
C. Sulfuric acid (H₂SO₄)
D. Nitric acid (HNO₃)
Hydrochloric acid (HCl) is a strong acid found in the human stomach.
A. 10-fold
B. 5-fold
C. 2-fold
D. 3-fold
The pH scale is logarithmic, meaning each unit represents a 10-fold change in acidity or alkalinity.
A. Ammonium hydroxide (NH₄OH)
B. Sodium hydroxide (NaOH)
C. Potassium hydroxide (KOH)
D. Calcium hydroxide (Ca(OH)₂)
Ammonium hydroxide (NH₄OH) is a weak base found in household cleaning products.
A. Acid
B. Base
C. Salt
D. Indicator
A substance that can donate a proton (H⁺) is known as an acid.
A. Pink to colorless
B. Colorless to pink
C. Yellow to blue
D. Blue to yellow
Phenolphthalein turns from pink to colorless in a basic solution.
A. Citric acid
B. Ascorbic acid
C. Tartaric acid
D. Malic acid
Citric acid is responsible for the tangy taste in lemons and limes.
A. Base
B. Acid
C. Salt
D. Indicator
A substance that can accept a proton (H⁺) is known as a base.
A. Turn blue litmus paper red
B. Feel slippery
C. Taste bitter
D. Release OH⁻ ions
Acidic solutions turn blue litmus paper red.
A. HNO₃
B. HCl
C. H₂SO₄
D. H₃PO₄
The chemical formula of nitric acid is HNO₃.
A. Titration
B. Neutralization
C. Precipitation
D. Oxidation
The process of adding an acid or a base to a solution to adjust its pH is known as titration.
A. Bitter taste
B. Sour taste
C. Slimy feel
D. Brown color
A common property of bases is a slimy or soapy feel.
A. 3
B. 6
C. 9
D. 12
The pH of a solution with a hydrogen ion concentration of 1 x 10⁻³ M is 3.
A. Acid-base reaction
B. Neutralization reaction
C. Precipitation reaction
D. Effervescence reaction
The reaction between an acid and a carbonate, producing carbon dioxide gas, is called an effervescence reaction.
A. pH of 7
B. Red litmus turns blue
C. Releases H⁺ ions
D. Bitter taste
Neutral solutions have a pH of 7.
A. Caustic soda
B. Baking soda
C. Washing soda
D. Epsom salt
Sodium hydroxide (NaOH) is commonly known as caustic soda.
A. Litmus paper
B. Thermometer
C. Barometer
D. pH meter
Litmus paper is commonly used to test for the presence of acids and bases.
A. 3
B. 7
C. 11
D. 14
The pH of a solution with a hydroxide ion concentration of 1 x 10⁻¹¹ M is 3.
A. Lactic acid
B. Citric acid
C. Acetic acid
D. Tartaric acid
Lactic acid is found in yogurt and contributes to its sour taste.
A. 0 to 14
B. 0 to 7
C. 7 to 14
D. -7 to 7
The pH scale ranges from 0 to 14.
A. Completely ionize in water
B. Partially ionize in water
C. Form a weak electrolyte
D. Have a pH above 7
Strong acids completely ionize in water.
A. H₂SO₄
B. HCl
C. HNO₃
D. H₃PO₄
The chemical formula of sulfuric acid is H₂SO₄.
A. 2
B. 6
C. 10
D. 14
The pH of a solution with a hydrogen ion concentration of 1 x 10⁻¹⁰ M is 6.
A. Conduct electricity
B. Taste sour
C. Turn litmus paper green
D. Have a pH of 7
Both acids and bases can conduct electricity.
A. 5
B. 7
C. 9
D. 11
The pH of a solution with a hydroxide ion concentration of 1 x 10⁻⁷ M is 7.