Consider the following statements about 'Quick Lime': 1. Its chemical name is Calcium Oxide. 2. It is used to treat basic soil. 3. It is a base. Which of the statements given above is/are correct?

Correct Option The correct option is (c). Explanation Quick lime is a chemical compound known as Calcium Oxide (CaO). As a metallic oxide, it exhibits basic properties and is utilized in various industrial and agricultural applications, particularly involving neutralization reactions. Statement-wise Analysis - Statement 1 is Correct: The chemical name of Quick Lime is Calcium Oxide (CaO). It is typically produced by the thermal decomposition of limestone (Calcium Carbonate). - Statement 2 is Incorrect: Quick lime is basic in nature. Therefore, it is used to treat acidic soil to neutralize the excess acidity. To treat basic soil, organic matter is typically added, which releases acids to neutralize the basicity. - Statement 3 is Correct: Calcium Oxide is a metallic oxide. Metallic oxides are inherently basic because they react with water to form bases (hydroxides), such as Calcium Hydroxide (Slaked Lime). Key Takeaway Quick Lime (CaO) is a basic oxide used to neutralize acidic soil; it is distinct from Slaked Lime (Calcium Hydroxide), though both are basic.

Consider the following statements about 'Quick… - NCERT Class 7 Science MCQ

NCERT Class 7 Science — Chapter 1: Acids, bases and salts

mcqmedium

Consider the following statements about 'Quick Lime':

Its chemical name is Calcium Oxide.
It is used to treat basic soil.
It is a base.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 7 · Page 44

Options

A1 and 2 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is (c).

Explanation

Quick lime is a chemical compound known as Calcium Oxide (CaO). As a metallic oxide, it exhibits basic properties and is utilized in various industrial and agricultural applications, particularly involving neutralization reactions.

Statement-wise Analysis

Statement 1 is Correct: The chemical name of Quick Lime is Calcium Oxide (CaO). It is typically produced by the thermal decomposition of limestone (Calcium Carbonate).
Statement 2 is Incorrect: Quick lime is basic in nature. Therefore, it is used to treat acidic soil to neutralize the excess acidity. To treat basic soil, organic matter is typically added, which releases acids to neutralize the basicity.
Statement 3 is Correct: Calcium Oxide is a metallic oxide. Metallic oxides are inherently basic because they react with water to form bases (hydroxides), such as Calcium Hydroxide (Slaked Lime).

Key Takeaway

Quick Lime (CaO) is a basic oxide used to neutralize acidic soil; it is distinct from Slaked Lime (Calcium Hydroxide), though both are basic.

Your note

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