Acids Bases And Salts

To solve this question, we need to identify which of the following compounds is a strong acid.

1. Understanding the Acids:
- CH₃COOH (Acetic Acid): A weak acid, commonly found in vinegar. It partially dissociates in water.
- HCl (Hydrochloric Acid): A strong acid, fully dissociates in water, commonly used in laboratories and industries.
- H₂O (Water): Neutral, neither an acid nor a base.
- NH₄OH (Ammonium Hydroxide): A weak base, not an acid.

2. Identifying the Strong Acid:
Among the options, HCl is a strong acid as it completely dissociates in water, releasing hydrogen ions (H⁺) without any equilibrium.

Final Answer:
Option (B) HCl is the strong acid.

To solve this question, we need to identify which of the given oxides is acidic in nature.

1. Understanding Acidic Oxides:
Acidic oxides are generally formed by non-metals and react with water to form acids. For example, carbon dioxide ( ) reacts with water to form carbonic acid.

2. Evaluating the Options:

• (A) – Magnesium oxide is a basic oxide, as it reacts with water to form magnesium hydroxide, a base.
• (B) – Sodium oxide is also a basic oxide, reacting with water to form sodium hydroxide, a base.
• (C) – Calcium oxide is a basic oxide, reacting with water to form calcium hydroxide, a base.
• (D) – Carbon dioxide is an acidic oxide, as it reacts with water to form carbonic acid, , which is acidic. ✔

Final Answer:
The correct answer is (D) , as it is an acidic oxide.

To solve this problem, we need to understand the nature of metallic oxides.

1. Nature of Metallic Oxides:
Metallic oxides are generally basic in nature. This means that when they dissolve in water, they form alkaline solutions. For example, sodium oxide (Na₂O) and calcium oxide (CaO) are basic oxides that react with water to form hydroxides such as NaOH and Ca(OH)₂.

2. Evaluating the Options:
(1) Acidic – Incorrect (Acidic oxides are generally non-metallic, like CO₂ or SO₂.)
(2) Neutral – Incorrect (Metallic oxides are typically not neutral.)
(3) Amphoteric – Incorrect (Amphoteric oxides can act both as acids and bases, like Al₂O₃, but this is not the general case for metallic oxides.)
(4) Basic – Correct ✅ (Most metallic oxides are basic in nature.)

Final Answer:
The correct option is (D) basic.

To solve the problem, we need to identify the salt in the given options.

1. What is a Salt?
A salt is a compound formed when an acid reacts with a base, resulting in the replacement of hydrogen ions by metal or ammonium ions. The general formula for a salt is , where is the metal ion and is the anion.

2. Analyzing the Given Options:
- is a salt formed by the neutralization of hydrochloric acid (HCl) with sodium hydroxide (NaOH). It is a typical example of a salt.
- is sodium hydroxide, which is a base, not a salt.
- is hydrochloric acid, not a salt.
- is hydrogen cyanide, which is a compound, but not a salt.

Final Answer:
The salt in the given options is .

To solve the problem, we need to identify the ion produced by bases in water.

1. Understanding the Behavior of Bases:
Bases are substances that release hydroxide ions ( ) when dissolved in water. For example, sodium hydroxide (NaOH) dissociates in water to form ions.

2. Identifying the Ion Released by Bases:
When a base dissolves in water, it gives ions, which are responsible for its basic nature.

Final Answer:
Bases can give ions in water.