A Review Quiz On Acids And Bases! Test

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A Review Quiz On Acids And Bases! Test - Quiz

Acids have a sour taste. Citric acid is what makes the sour taste of lemons, oranges, and other citrus fruits, while acetic acid gives vinegar its sour taste. An acid will turn litmus paper red. Litmus is a vegetable dye that turns red to indicate an acid and blue to indicate a base. Acids also contain combined hydrogen. Take this review quiz now!


Questions and Answers
  • 1. 

    What color is methyl orange in alkali conditions?

    • A.

      Blue

    • B.

      Orange

    • C.

      Yellow

    • D.

      Red

    Correct Answer
    C. Yellow
    Explanation
    Methyl orange is a pH indicator that changes color depending on the acidity or alkalinity of a solution. In alkali conditions, which are basic or high in pH, methyl orange turns yellow. This is because the dye molecule in methyl orange is in its basic form, which reflects yellow light. Therefore, the correct answer is yellow.

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  • 2. 

    If I react magnesium with hydrochloric acid, what gas is produced?

    • A.

      Hydrogen

    • B.

      Oxygen

    • C.

      Carbon Dioxide

    • D.

      No gas is produced

    Correct Answer
    A. Hydrogen
    Explanation
    When magnesium reacts with hydrochloric acid, it undergoes a single displacement reaction, where magnesium displaces hydrogen from the hydrochloric acid. This results in the formation of magnesium chloride and hydrogen gas. Therefore, the correct answer is hydrogen.

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  • 3. 

    Practically a household name today, this base finds utility in medical science as an antacid for curing heartburn and acid indigestion. This compound is used in fire extinguishers for controlling minor fires sparked by electricity and for removing paint and corrosion from the surfaces of metallic items. Its use in the bakery for the leavening of bread lends it, among others, the name "bread soda." What is the compound in question?

    • A.

      Sodium hydroxide

    • B.

      Sodium carbonate

    • C.

      Sodium hydrogen carbonate

    • D.

      Monosodium glutamate

    Correct Answer
    C. Sodium hydrogen carbonate
    Explanation
    Sodium hydrogen carbonate, also known as baking soda, is the compound in question. It is commonly used as an antacid to treat heartburn and acid indigestion in medical science. It is also used in fire extinguishers to control minor fires caused by electricity and for removing paint and corrosion from metallic surfaces. Its use in baking for leavening bread gives it the nickname "bread soda."

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  • 4. 

    Sulphuric acid, the 'Oil of Vitriol', is prepared industrially by the Contact Process. The amphoteric compound catalyzes the high-temperature oxidation of sulfur dioxide to sulfur trioxide in this process. The most industrially important oxide of its parent metal, it is also useful as a catalyst in the preparation of oxalic acid, adipic acid, and acrylic acid. What is this sparingly soluble, (generally) yellow solid?

    • A.

      Vanadium pentoxide

    • B.

      Ferric oxide

    • C.

      Aluminium oxide

    • D.

      Manganese dioxide

    Correct Answer
    A. Vanadium pentoxide
    Explanation
    Vanadium pentoxide is the correct answer because it is a sparingly soluble, yellow solid. It is also known as an amphoteric compound, which means it can act as both an acid and a base. In the Contact Process for the industrial preparation of sulphuric acid, vanadium pentoxide acts as a catalyst for the high-temperature oxidation of sulfur dioxide to sulfur trioxide. Additionally, vanadium pentoxide is industrially important and can be used as a catalyst in the preparation of various acids, including oxalic acid, adipic acid, and acrylic acid.

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  • 5. 

    Which acid has the formula HCNO?

    • A.

      Cyanic Acid

    • B.

      Hydrofluoric Acid

    • C.

      Hydrocyanic Acid

    • D.

      Formic Acid

    Correct Answer
    A. Cyanic Acid
    Explanation
    Cyanic Acid has the formula HCNO. The other options, Hydrofluoric Acid, Hydrocyanic Acid, and Formic Acid, have different chemical formulas and do not match the given formula HCNO. Therefore, the correct answer is Cyanic Acid.

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  • 6. 

    The 'fizz' in soft drinks is produced by adding which acid?

    • A.

      Citric acid

    • B.

      Hydrochloric acid

    • C.

      Carbonic acid

    • D.

      Nitric acid

    Correct Answer
    C. Carbonic acid
    Explanation
    The fizz in soft drinks is produced by adding carbonic acid. When carbon dioxide gas is dissolved in water, it forms carbonic acid, which gives the drink its characteristic fizziness. This acid is responsible for the bubbles and the refreshing sensation when consuming carbonated beverages. Citric acid, hydrochloric acid, and nitric acid are not typically used in soft drinks production and do not contribute to the fizziness.

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  • 7. 

    Which of the following substances contain an alkali?

    • A.

      Baking powder

    • B.

      Coca-cola

    • C.

      Distilled water

    • D.

      Vinegar

    Correct Answer
    A. Baking powder
    Explanation
    Baking powder contains an alkali because it is a mixture of a weak acid (such as cream of tartar) and a carbonate or bicarbonate (such as baking soda). When combined with liquid, the acid and alkali react to produce carbon dioxide gas, causing the dough or batter to rise. This reaction is known as the alkaline reaction and is characteristic of alkalis. Therefore, baking powder is the correct answer as it contains an alkali.

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  • 8. 

    Strong acids and strong alkalis are.......

    • A.

      Able to turn blue litmus paper red

    • B.

      Corrosive and/or caustic

    • C.

      Sour

    • D.

      Sweet

    Correct Answer
    B. Corrosive and/or caustic
    Explanation
    Strong acids and strong alkalis are corrosive and/or caustic because they have the ability to cause damage or destroy materials they come into contact with. Corrosion refers to the gradual deterioration of a substance due to a chemical reaction, while caustic substances are capable of burning or destroying organic tissue. Strong acids and strong alkalis have high levels of reactivity and can cause severe burns or damage to surfaces, making them corrosive and/or caustic.

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  • 9. 

    The chemical name for Vitamin C is __________ acid.

    • A.

      Ascorbic

    • B.

      Acetic

    • C.

      Lactic

    • D.

      Oxyric

    Correct Answer
    A. Ascorbic
    Explanation
    The chemical name for Vitamin C is ascorbic acid.

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  • 10. 

    Aqua regia is a very powerful acid and its name in Latin means 'Royal Water'. Why was it given this name?

    • A.

      The ancient Greek kings used it as a weapon.

    • B.

       The Roman Emperor used it for cleaning his bathrooms

    • C.

      It can dissolve gold

    • D.

      It was often found in nature along with silver deposits

    Correct Answer
    C. It can dissolve gold
    Explanation
    Aqua regia is named "Royal Water" because it has the unique ability to dissolve gold. This characteristic made it highly valuable and sought after, hence the association with royalty.

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • May 14, 2019
    Quiz Created by
    Devrv
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