MEDIUM
8th CBSE
IMPORTANT
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Why are dense white fumes formed when hydrogen chloride is dissolved in moist air? 

Important Questions on Some Important Elements and their Compounds

MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 7 - Some Important Elements and their Compounds>PRACTICE QUESTIONS (CLASSROOM WING)>Q 27

Write the equation for the following: 

Addition of concentrated HNO3 to copper. 

MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 7 - Some Important Elements and their Compounds>PRACTICE QUESTIONS (CLASSROOM WING)>Q 27

Write the equation for the following: 

Addition of dilute HNO3 to zinc.

MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 7 - Some Important Elements and their Compounds>PRACTICE QUESTIONS (CLASSROOM WING)>Q 28
Write a note on safety matches. 
HARD
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 7 - Some Important Elements and their Compounds>PRACTICE QUESTIONS (CLASSROOM WING)>Q 29
Describe how sulphur is extracted using the Sicilian process. 
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 7 - Some Important Elements and their Compounds>PRACTICE QUESTIONS (CLASSROOM WING)>Q 30
Differentiate between rhombic and monoclinic sulphur. 
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 7 - Some Important Elements and their Compounds>PRACTICE QUESTIONS (CLASSROOM WING)>Q 30
The most significant part of the manufacture of glass is the cooling of molten glass. Mention the desirable conditions for cooling and give reasons. 
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 7 - Some Important Elements and their Compounds>PRACTICE QUESTIONS (CLASSROOM WING)>Q 31

How is H2S used as an analytical reagent? 

EASY
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 7 - Some Important Elements and their Compounds>PRACTICE QUESTIONS (CLASSROOM WING)>Q 32
Mention the uses of chlorine.