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प्रश्न
The sticky substance formed when soap is added to hard water is ______.
उत्तर
The sticky substance formed when soap is added to hard water is scum.
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संबंधित प्रश्न
Give one word for the following statement:
A substance which does not contain water .
What are drying or desiccating agents? Give examples.
Name three methods by which hydrous substances can be made anhydrous.
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.
Complete the statement by filling the blank with the correct word from the option.
Hygroscopic substance absorb moisture from the atmosphere & _______their original state.
Explain the following observation:
In the expression anhydrous copper sulphate, what is meant by “anhydrous”?
Select the correct answer from the choice given in the options.
An anhydrous crystal _____.
Give a reason for the following:
Heating a hydrated copper sulphate crystal is deemed a chemical change.
Name or state the following:
A liquid hydroscopic substance.
Define Hydrated salt.
