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Why calcium sulphate hemihydrate is known as Plaster of Paris?

Important Questions on Acids, Bases and Salts

MEDIUM
Science>Chemistry>Acids, Bases and Salts>Salts
Write the molecular formulae and two uses of bleaching powder.
MEDIUM
Science>Chemistry>Acids, Bases and Salts>Salts
A compound that is prepared from gypsum has the property of hardening when mixed with the proper quantity of water. Identify the compound.
EASY
Science>Chemistry>Acids, Bases and Salts>Salts
Write any two uses of plaster of Paris. 
 
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Science>Chemistry>Acids, Bases and Salts>Salts
Which of the following is used to purify drinking water?
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Science>Chemistry>Acids, Bases and Salts>Salts
Baking soda is a mixture of:
HARD
Science>Chemistry>Acids, Bases and Salts>Salts

What is gypsum? What happens when gypsum is heated to 373K?

EASY
Science>Chemistry>Acids, Bases and Salts>Salts
Plaster of Paris hardens by: 
 
EASY
Science>Chemistry>Acids, Bases and Salts>Salts

Write chemical formula of the following-

  • Bleaching Powder
HARD
Science>Chemistry>Acids, Bases and Salts>Salts
How is washing soda prepared from sodium carbonate? Give its chemical equation. State the type of this salt. Name the type of hardness of water which can be removed by it?
MEDIUM
Science>Chemistry>Acids, Bases and Salts>Salts
Write the chemical equation of the preparation method and any two uses of bleaching powder. 
EASY
Science>Chemistry>Acids, Bases and Salts>Salts
What happens when bleaching powder reacts with dil. hydrochloric acid. Write only chemical equation.
HARD
Science>Chemistry>Acids, Bases and Salts>Salts
How is sodium hydroxide manufactured in industries? Name the process. In this process, a gas X is formed as a by-product. This gas reacts with lime water to give a compound Y, which is used as a bleaching agent in the chemical industry. Identify X and Y and write the chemical equation of the reaction involved.
MEDIUM
Science>Chemistry>Acids, Bases and Salts>Salts
Write only chemical equation for the reaction of preparation of bleaching powder. Give its one use also.
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Science>Chemistry>Acids, Bases and Salts>Salts
Write the molecular formulae and two uses of plaster of Paris. 
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Science>Chemistry>Acids, Bases and Salts>Salts

Answer the following:

A calcium compound having odour of chlorine is used to remove yellowish-white clothes in laundries. Name the compound.

EASY
Science>Chemistry>Acids, Bases and Salts>Salts
Why should we store Plaster of Paris in a moisture-proof container? Write its equation.
EASY
Science>Chemistry>Acids, Bases and Salts>Salts
What happens when Gypsum is heated upto 373∘K (Write only chemical equation).
MEDIUM
Science>Chemistry>Acids, Bases and Salts>Salts
A compound that is prepared from gypsum has the property of hardening when mixed with the proper quantity of water. Write the chemical name of the compound. 
EASY
Science>Chemistry>Acids, Bases and Salts>Salts
The chemical formula for plaster of Paris is:
EASY
Science>Chemistry>Acids, Bases and Salts>Salts
The pH of a salt used to make tasty and crispy pakoras is 14. Identify the salt and write a chemical equation for its formation. List its two uses.