With reference to the burning of paper and cotton, consider the following statements: 1. Both give a similar odour when burnt. 2. This similarity suggests that paper is made from animal proteins. Which of the statements given above is/are correct?

With reference to the burning of paper and… - NCERT Class 6 Science MCQ

NCERT Class 6 Science — Chapter 1: Fibre to fabric

mcqmedium

With reference to the burning of paper and cotton, consider the following statements:

Both give a similar odour when burnt.
This similarity suggests that paper is made from animal proteins.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 6 · Page 25

Options

A1 only
B2 only
CBoth 1 and 2
DNeither 1 nor 2

Did you get this right?

Solution

The correct option is (a).

Explanation

The odour produced during the combustion of a material depends on its chemical composition. Natural fibers are generally classified into plant fibers (cellulosic) and animal fibers (proteinaceous).

Statement 1 is Correct: Both paper and cotton are plant-based materials composed primarily of cellulose (a complex carbohydrate). When burnt, cellulosic materials produce a characteristic odour resembling burning leaves or grass. Since both paper and cotton share this chemical composition, they emit a similar smell upon combustion.

Statement 2 is Incorrect: The similarity in odour suggests that paper is made of cellulose, similar to cotton, and not animal proteins. Materials made of animal proteins (such as wool, silk, or hair) produce a distinct odour of burning hair when burnt. Paper is derived from plant pulp and does not contain animal proteins.

Key Takeaway: Burning cellulose (cotton, paper) smells like burning leaves, whereas burning protein (wool, silk, hair) smells like burning hair.

Your note

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