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प्रश्न
Define the following term:
Hygroscopy
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उत्तर
It is the phenomenon by which substances absorb moisture from air, but only sufficiently so as to become wet.
संबंधित प्रश्न
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.
Write a balanced chemical equation for Action of dilute hydrochloric acid on magnesium sulphite.
Name the major salt present in sea-water.
Name the raw material used for the production of caustic soda.
Complete and balance the following chemical equations:
`NaCI (aq) + H_2O (l) `
Explain how anhydrous copper sulphate can be used to detect the presence of moisture (water) in a liquid
What happens when copper sulphate crystals are heated strongly? Explain with the help of an equation.
The products of chlor-alkali process are:
(a) NaCl, Cl2 and H2
(b) H2, Cl2 and NaOH
(c) Cl2, Na2CO3 and H2O
(d) NaOH, Cl2 and HCl
The number of molecules of water of crystallisation present in washing soda crystals is:
(a) five
(b) two
(c) ten
(d) seven
The aqueous solution of one of the following salts will turn red litmus to blue. This salt is:
(a) potassium sulphate
(b) sodium sulphate
(c) sodium chloride
(d) potassium carbonate
P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn:
red litmus blue?
Give one example of a salt which gives an aqueous solution having:
pH more than 7
What is a ‘salt’?
Give four substances which contain water of crystallization and write their common name.
Sodium carbonate is a basic salt because it is a salt of a ____________.
Many salts absorb water from the atmosphere. This property is called:
One of the constituents of baking powder is sodium hydrogencarbonate. The other constituent is :
You are provided with the list of chemicals mentioned below in the box:
| Sodium hydroxide solution, copper carbonate, zinc, hydrochloric acid, copper, dilute sulphuric acid, chlorine, iron |
Using suitable chemicals from the list given, write a balanced chemical equation for the preparation of the salt mentioned below:
Sodium zincate
Select the correct answer from A, B, C, D and E.
A compound which in the aqueous solution state, is neutral in nature.
