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Test: Acids, Bases and Salts - SSC CGL MCQ


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15 Questions MCQ Test General Awareness for SSC CGL - Test: Acids, Bases and Salts

Test: Acids, Bases and Salts for SSC CGL 2024 is part of General Awareness for SSC CGL preparation. The Test: Acids, Bases and Salts questions and answers have been prepared according to the SSC CGL exam syllabus.The Test: Acids, Bases and Salts MCQs are made for SSC CGL 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Acids, Bases and Salts below.
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Test: Acids, Bases and Salts - Question 1

What is the characteristic taste associated with bases?

Detailed Solution for Test: Acids, Bases and Salts - Question 1

Bases are typically characterized by a bitter taste. This taste distinction, along with their slippery feel when in solution, helps differentiate bases from acids. For instance, substances like baking soda are classified as bases due to their bitter taste.

Test: Acids, Bases and Salts - Question 2

According to the Arrhenius concept, what defines a base?

Detailed Solution for Test: Acids, Bases and Salts - Question 2

In the Arrhenius concept, a base is defined as a substance that can release OH- ions in water. Examples of bases based on this definition include sodium hydroxide (NaOH) and ammonium hydroxide (NH4OH), which can both release hydroxide ions in aqueous solutions.

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Test: Acids, Bases and Salts - Question 3

Which concept of acids and bases involves the ability to donate or accept a proton?

Detailed Solution for Test: Acids, Bases and Salts - Question 3

The Bronsted-Lowry concept of acids and bases revolves around the idea that an acid is a substance capable of donating a proton, while a base is a substance capable of accepting a proton. This concept expands the definition of acids and bases beyond the simple release of ions in solution.

Test: Acids, Bases and Salts - Question 4

What role do acid-base indicators play in differentiating between acids and bases in a solution?

Detailed Solution for Test: Acids, Bases and Salts - Question 4

Acid-base indicators are crucial in distinguishing between acids and bases in a solution primarily through a color change. When an indicator is added to a solution with an acid or base, it changes color based on the pH of the solution. This color change helps in identifying whether the solution is acidic or basic, providing a visual cue for the nature of the substance in question.

Test: Acids, Bases and Salts - Question 5

Why are phenolphthalein and methyl orange not ideal choices for certain types of substances?

Detailed Solution for Test: Acids, Bases and Salts - Question 5

Phenolphthalein is not recommended for weak bases like ammonium hydroxide, and methyl orange is unsuitable for weak acids such as acetic acid. This limitation arises because these indicators do not provide distinct color changes in the presence of weak acids or bases, making them less effective in such scenarios.

Test: Acids, Bases and Salts - Question 6

What purpose does the pH scale serve in evaluating the strength of acidic or basic solutions?

Detailed Solution for Test: Acids, Bases and Salts - Question 6

The pH scale is instrumental in quantifying the acidity or basicity of solutions. It provides a numerical value that indicates the concentration of hydrogen ions in a solution, which in turn signifies the strength of the acid or base. Lower pH values denote acidic solutions, while higher pH values indicate basic solutions.

Test: Acids, Bases and Salts - Question 7

What does the pH value indicate about a liquid?

Detailed Solution for Test: Acids, Bases and Salts - Question 7

The pH value of a liquid indicates its acidity or basicity level. This value is a measure of how acidic or basic a substance is on a scale from 0 to 14. Substances with a pH less than 7 are considered acidic, while those with a pH greater than 7 are basic. A pH of 7 is neutral. pH plays a critical role in various biological and chemical processes and is crucial for the survival of plants, animals, and even humans.

Test: Acids, Bases and Salts - Question 8

What range of pH is typically required for the survival of plants and animals?

Detailed Solution for Test: Acids, Bases and Salts - Question 8

Plants and animals usually require a specific pH level to survive, which typically falls within the range of 7.0 to 7.8. This range provides the optimal conditions for various biochemical processes within organisms. Any significant deviation from this range can have detrimental effects on the health and well-being of plants and animals.

Test: Acids, Bases and Salts - Question 9

What is the formula used to calculate the pH of a liquid?

Detailed Solution for Test: Acids, Bases and Salts - Question 9

The formula to calculate the pH of a liquid is pH = -log [H+]. This formula represents the negative logarithm (base 10) of the hydrogen ion concentration in moles per liter. By calculating the pH value using this formula, one can determine whether a substance is acidic, basic, or neutral based on its pH value.

Test: Acids, Bases and Salts - Question 10

What is the process called when the right amounts of an acid solution and a base solution are mixed, resulting in the formation of salt and water, releasing heat in the process?

Detailed Solution for Test: Acids, Bases and Salts - Question 10

Neutralization is the chemical reaction that occurs when an acid and a base are mixed in the right proportions. This reaction results in the formation of salt and water, along with the release of heat. It is an essential concept in chemistry, demonstrating the balance of acidic and basic properties to create a neutralized solution.

Test: Acids, Bases and Salts - Question 11

Which type of salts do not have a hydrogen or a hydroxyl group that can be replaced?

Detailed Solution for Test: Acids, Bases and Salts - Question 11

Normal salts like sodium chloride and sodium nitrate do not contain replaceable hydrogen or hydroxyl groups. They are formed from the reaction of a base with an acid where both hydrogen and hydroxyl groups are not involved in the reaction, resulting in a simple salt compound.

Test: Acids, Bases and Salts - Question 12

What type of solution is created when salts derived from a weak acid and a weak base undergo hydrolysis in water?

Detailed Solution for Test: Acids, Bases and Salts - Question 12

When salts resulting from a weak acid and a weak base undergo hydrolysis in water, they produce a neutral solution. An example of this is ammonium acetate, which originates from acetic acid and ammonium hydroxide, leading to a solution that is neither acidic nor basic but neutral.

Test: Acids, Bases and Salts - Question 13

What distinguishes Lewis acids from Lewis bases?

Detailed Solution for Test: Acids, Bases and Salts - Question 13

In the Lewis concept, acids are substances that can accept an electron pair, while bases are substances that can donate an electron pair. This distinguishes Lewis acids like boron fluoride (BF3) and aluminium chloride (AlCl3) from Lewis bases like fluoride ions (F−) and water.

Test: Acids, Bases and Salts - Question 14

How do natural indicators differ from synthetic acid-base indicators in testing for acidity or basicity?

Detailed Solution for Test: Acids, Bases and Salts - Question 14

Natural indicators like turmeric, litmus (from lichens), and China rose petals are derived from plant sources, making them organic and environmentally friendly. In contrast, synthetic indicators such as methyl orange and phenolphthalein are artificially created in laboratories to exhibit specific color changes in the presence of acids or bases. The choice between natural and synthetic indicators often depends on the specific requirements of the experiment or test being conducted.

Test: Acids, Bases and Salts - Question 15

What are buffer solutions known for?

Detailed Solution for Test: Acids, Bases and Salts - Question 15

Buffer solutions are special solutions that are known for their ability to resist significant changes in pH when small amounts of acids or bases are added to them. These solutions have specific pH values and are crucial in maintaining the stability of pH in various biological and chemical systems. Buffer solutions play a vital role in regulating pH levels and preventing drastic shifts in acidity or basicity, ensuring that processes can function optimally.

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