Get a free home demo of LearnNext

Available for CBSE, ICSE and State Board syllabus.
Call our LearnNext Expert on 1800 419 1234 (tollfree)
OR submit details below for a call back

clear
Finding exercises tough? Install LearnNext+ app to watch our videos and get a crystal clear understanding of concepts Install Now X
X
learnnextPlus

Install the app to watch our videos and get a crystal clear understanding of concepts

Install Now
searchtune
What people are asking?

Manikanth

May 17, 2014

Why should curd and sour substances not be kept in brass and copper vessels?

Answer.

sour substances are cidic in nature,i.e, they have acids in them. So, when they are kept in brass or copper vessels, they react...

Answer (10)

Adithyan Sanal

May 1, 2015

 List two tests for experimentally distinguishing between an alcohol and a carboxylic acid.

Answer.

Alcohols and carboxylic acids can be distinguished by litmus test and ...

Answer (2)

Rujuta Killedar

Feb 19, 2015

A mixture of oxygen and ethyne is burnt for welding.can you tell why a mixture of ethyne and air is not used?

When ethyne is burnt in air incomplete burning takes place and produce sooty flam...

Answer (1)

Prathik Bannimath

Sep 28, 2014

WHY DO CRYSTALS OF WASHING SODA CHANGE TO WHITE IN COLOUR ON EXPOSURE TO AIR?

When washing soda is exposed to air, it loses its water of crystallisation and becomes Na2CO3 (sodium carbonate) generally we can say when it is left open in the dry air, lose its water of crystallizati...

Answer (4)

Swathi Ambati

Dec 26, 2014

During summer, milkman generally adds a little amount of baking soda to fresh milk. Why? 

Baking soda is a base. It is ad...

Answer (2)

Manikanth

May 17, 2014

What is the common name of the compound CaOCl2?

The most common name of caocl2 is bleaching powder

Answer (5)

Satyanarayana Prasad

Dec 29, 2014

Why ammonia is considered as a base even though it does not contain hydroxyl ion?

Ans: Ammonia when dissolved in water it forms ammonium hydroxide....

Answer (1)

Shine

May 22, 2014

acid bases and salts



does base react with non metal ? if yes.then give some examples         


Reaction of nonmetal oxide with base:
CO2 + 2NaOH → Na2CO3 +H2O

Answer (1)

Adithyan Sanal

Apr 25, 2015

Both soap and detergent are some type of salts. What is the difference between them? Describe in brief the cleansing action of soap. Why do soaps not form lather in hard water? List two problems that arise due to the use of detergents instead of soaps. 

This answer has an image. Please click on the question to read more.

Answer (1)

Girish

Sep 9, 2013

during summer season .a milkman usually adds a very small amount of baking soda to milk . why ?

Answer.

lactobacillus increases which converts into lactic acid decreasing the pH of milk During summers,temperature is high and hence The milkman adds baking soda to the milk to increase the pH ...

Answer (2)

Manikanth

May 17, 2014

Why should curd and sour substances not be kept in brass and copper vessels?

Answer.

sour substances are cidic in nature,i.e, they have acids in them. So, when they are kept in brass or copper vessels, they react...

Answer (10)

Adithyan Sanal

May 1, 2015

 List two tests for experimentally distinguishing between an alcohol and a carboxylic acid.

Answer.

Alcohols and carboxylic acids can be distinguished by litmus test and ...

Answer (2)

Rujuta Killedar

Feb 19, 2015

A mixture of oxygen and ethyne is burnt for welding.can you tell why a mixture of ethyne and air is not used?

When ethyne is burnt in air incomplete burning takes place and produce sooty flam...

Answer (1)

Prathik Bannimath

Sep 28, 2014

WHY DO CRYSTALS OF WASHING SODA CHANGE TO WHITE IN COLOUR ON EXPOSURE TO AIR?

When washing soda is exposed to air, it loses its water of crystallisation and becomes Na2CO3 (sodium carbonate) generally we can say when it is left open in the dry air, lose its water of crystallizati...

Answer (4)

Swathi Ambati

Dec 26, 2014

During summer, milkman generally adds a little amount of baking soda to fresh milk. Why? 

Baking soda is a base. It is ad...

Answer (2)

Manikanth

May 17, 2014

What is the common name of the compound CaOCl2?

The most common name of caocl2 is bleaching powder

Answer (5)

Satyanarayana Prasad

Dec 29, 2014

Why ammonia is considered as a base even though it does not contain hydroxyl ion?

Ans: Ammonia when dissolved in water it forms ammonium hydroxide....

Answer (1)

Shine

May 22, 2014

acid bases and salts



does base react with non metal ? if yes.then give some examples         


Reaction of nonmetal oxide with base:
CO2 + 2NaOH → Na2CO3 +H2O

Answer (1)

Adithyan Sanal

Apr 25, 2015

Both soap and detergent are some type of salts. What is the difference between them? Describe in brief the cleansing action of soap. Why do soaps not form lather in hard water? List two problems that arise due to the use of detergents instead of soaps. 

This answer has an image. Please click on the question to read more.

Answer (1)

Girish

Sep 9, 2013

during summer season .a milkman usually adds a very small amount of baking soda to milk . why ?

Answer.

lactobacillus increases which converts into lactic acid decreasing the pH of milk During summers,temperature is high and hence The milkman adds baking soda to the milk to increase the pH ...

Answer (2)

Filters