Advertisements
Advertisements
प्रश्न
Name or state the following:
A liquid hydroscopic substance.
Advertisements
उत्तर
A liquid hygroscopic substance - concentrated sulphuric acid (cone. H2SO4)
APPEARS IN
संबंधित प्रश्न
Give two examples of Crystalline anhydrous substances.
Give one word for the following statement:
A substance which does not contain water .
Give the names and formulae of two substances.
Hydrated substance
The substance that can remove hydrogen and oxygen atoms in the ratio of 2:1(in the form of water) from the compound.
The process of separation or deposition of crystals from a hot saturated solution on gentle cooling of the solution is called ‘crystallization’. With reference to the statement explain what is meant by ‘water of crystallization. State which physical properties of a crystal are correlated with the water of crystallization.
Differentiate between ‘hydrated’ & ‘anhydrous’ crystals. Give the chemical formula of – the following hydrated crystals -
(a) Washing soda
(b) Gypsum
(c) Blue vitriol
(d) Epsom salt
(e) Glauber’s salt.
State which crystal from (a) to (e) is a pentahydrate.
Differentiate between an efflorescent, deliquescent & ‘ hygroscopic substance with suitable examples.
Differentiate between the following:
Deliquescent salt and hygroscopic salt
Define Hydrated salt.
'A' is a blue coloured crystalline salt. On heating, it loses blue colour and to give 'B'. When water is added, 'B' gives back to 'A'. Identify A and B, write the equation.
