EASY
9th CBSE
IMPORTANT
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What do you understand by the term symbol of an element?

Important Questions on Is Matter Around Us Pure?

EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2D>Q 4
Write the names and symbols of two elements, which are represented by the first letter of English name.
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2D>Q 4
Write the names and symbols of two elements, which are represented by the two letters of the English name.
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2D>Q 4
Write the names and symbols of two elements, which are represented by the two letters of Latin name in the English alphabet.
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>EXERCISE 2D>Q 4
Name two elements which exist in the liquid state at room temperature.
HARD
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q 1

You are given a mixture of ammonium chloride, sand and common salt for separation. A student first dissolved the mixture in water then filtered to remove sand. 
(i) Will the student be able to separate ammonium chloride from sodium chloride?

(ii) Give a reason for your answer in (i).

(iii) Suggest an alternative procedure to separate the constituents of the mixture.

HARD
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q 2
On a cold morning, Abhay noticed that the smoke coming out of the chimney of a mill is bluish in colour.
(i) Is the smoke really blue in colour? 
(ii) Which phenomenon makes the smoke blue? 
(iii) Who discovered the phenomenon in (ii)? 
 
MEDIUM
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q 3

Which is the dispersed phase and dispersing medium in the following in terms of solid, liquid and gas?

(i) Mist (ii) Smoke (iii) shaving cream (iv) mud (v) rubber (vi) butter (vii) gemstone.

EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 2 - Is Matter Around Us Pure?>ASSIGNMENTS FOR FORMATIVE ASSESSMENT>Q 4
Example of foam is _____. (froth/ cheese)