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Matter in Our Surroundings

Give a reason for the following observations: (a) Naphthalen

Science

Class 9

NCERT

Chapter 1: Matter in Our Surroundings

9 questions

Convert the following temperatures to the Kelvin scale.

(a)

2 5^{\circ} C

(b)

37 3^{\circ} C

Give a reason for the following observations:

(a)

Naphthalene balls disappear with time without leaving any solid.

(b)

We can get the smell of perfumes sitting several metres away.

Arrange the following substances in increasing order of forces of attraction between the particles :

water, sugar, oxygen.

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Question

Easy

Solving time: 2 mins

Give a reason for the following observations:

$(a)$ Naphthalene balls disappear with time without leaving any solid.
$(b)$ We can get the smell of perfumes sitting several metres away.

Views: 6,879 students

Updated on: Aug 4, 2023

Book:

Science (NCERT)

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Give a reason for the following observations:

(a)

Naphthalene balls disappear with time without leaving any solid.

(b)

We can get the smell of perfumes sitting several metres away.

6 mins ago

Discuss this question LIVE

6 mins ago

Text solutionVerified

(a) Naphthalene balls undergo sublimation due to which it converts directly into vapours and disappear into air without leaving any solid.

(b) The particles of perfume diffuse rapidly into the air and its smell can be felt while sitting several metres away.

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Practice more questions from Science (NCERT)

Convert the following temperatures to the Kelvin scale.

(a)

2 5^{\circ} C

(b)

37 3^{\circ} C

Give a reason for the following observations:

(a)

Naphthalene balls disappear with time without leaving any solid.

(b)

We can get the smell of perfumes sitting several metres away.

Arrange the following substances in increasing order of forces of attraction between the particles :

water, sugar, oxygen.

View all

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Question Text	Give a reason for the following observations: $(a)$ Naphthalene balls disappear with time without leaving any solid. $(b)$ We can get the smell of perfumes sitting several metres away.
Updated On	Aug 4, 2023
Topic	Matter in Our Surroundings
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 12
Upvotes	1166
Avg. Video Duration	4 min

Give a reason for the following observations:

$(a)$ Naphthalene balls disappear with time without leaving any solid.
$(b)$ We can get the smell of perfumes sitting several metres away.

Text solutionVerified

Filo tutor solutions (12)

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Give a reason for the following observations:(a) Naphthalene balls disappear with time without leaving any solid.(b) We can get the smell of perfumes sitting several metres away.

Text solutionVerified

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Give a reason for the following observations:

$(a)$ Naphthalene balls disappear with time without leaving any solid.
$(b)$ We can get the smell of perfumes sitting several metres away.