EASY
10th CBSE
IMPORTANT
Earn 100

Give a suitable reason for the following statement:
The crystals of washing soda change to white powder on exposure to air.
 

Important Questions on Acids, Bases and Salts

EASY
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 2 - Acids, Bases and Salts>PRACTICE QUESTIONS SET>Q 17
Give a suitable reason for the following statement:
An aqueous solution of sodium chloride is neutral.
 
MEDIUM
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 2 - Acids, Bases and Salts>PRACTICE QUESTIONS SET>Q 18

Baking soda is used in small amount in baking bread and cake. It helps to make these soft and spongy. An aqueous solution of baking soda turns red litmus blue. It is also used in soda-acid fire extinguisher. Use the information to answer the following question:
How does baking soda help to make cakes and bread soft and spongy?

MEDIUM
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 2 - Acids, Bases and Salts>PRACTICE QUESTIONS SET>Q 18
Baking soda is used in small amount in baking bread and cake. It helps to make these soft and spongy. An aqueous solution of baking soda turns red litmus blue. It is also used in soda-acid fire extinguisher. Use the information to answer the following question:
How does it help in extinguishing fire?
 
EASY
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 2 - Acids, Bases and Salts>PRACTICE QUESTIONS SET>Q 18
Baking soda is used in small amount in baking bread and cake. It helps to make these soft and spongy. An aqueous solution of baking soda turns red litmus blue. It is also used in soda-acid fire extinguisher. Use the information to answer the following question:
Is pH value of baking soda solution less than or greater than 7?
 
HARD
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 2 - Acids, Bases and Salts>PRACTICE QUESTIONS SET>Q 18
State the chemical name and formula of washing soda. Write two chemical equations involved in the preparation of washing soda from baking soda. 
MEDIUM
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 2 - Acids, Bases and Salts>SELF-EVALUATION TEST>Q 1
Four solutions A, B, C and D when tested with universal indicator showed pH as 2, 1, 12 and 9 respectively. Which solution is
(a) strongly acidic ?
(b) Weakly acidic?
(c) Strongly basic?
(d) Weakly basic?
 
HARD
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 2 - Acids, Bases and Salts>SELF-EVALUATION TEST>Q 2
What happens when crystals of washing soda are left open in dry air? What is this change named as? Name two industries based on washing soda.
HARD
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 2 - Acids, Bases and Salts>SELF-EVALUATION TEST>Q 3
The term 'available chlorine' is used in case of the bleaching powder. What is meant by the term 'available chlorine’? Which gas is released when this compound is left exposed to air? Give reaction also.