Login
Login
Sign up
Start
Mathmania
Teacher tutorials
TOP
Subjects
Bridge Course
Testworks
Subject updates
Ya+
News
Send feedback
See more
Contacts
About Us
Terms and Conditions
Privacy Policy
PDF chapter test
TRY NOW
Subjects
Science State Board
Class 9
Acids, bases and salts
Textbook questions
7.
Answer in brief V
Exercise condition:
4
m.
1
.
Correct the mistakes:
a
.
Washing soda is used for making cakes and bread soft, spongy.
b
.
Calcium sulphate hemihydrate is used in textile industry.
a
.
Bleaching powder is used for making cakes and bread soft, spongy.
Plaster of Paris is used for making cakes and bread soft, spongy.
Baking soda is used for making cakes and bread soft, spongy.
b
.
Calcium sulphate hemihydrate is used in textile industry.
Calcium oxychloride is used in textile industry.
Calcium nitrate hemihydrate is used in textile industry.
2
.
What is neutralization reaction? Give an example.
Acids and bases react with one another to produce
salt and water
salt and hydrogen gas
salt and carbon dioxide
.
Example:
\(CaOH + HCl ➝ CaCl + H_2\)
\(NaOH + HF ➝ NaH + H_2O+CO_2\)
\(KOH + HCl ➝ KCl + H_2O\)
Login
or
Fast registration
Previous exercise
Exit to the topic
Next exercise
Send feedback
Did you find an error?
Send it to us!