$CATEGORY: Science - Khan Academy/2.Acids, Bases and Salts/2.Acids, Bases and Salts--More About Salts

//Multiple Choice

The chemical name of washing soda is\:
{
~ Sodium hydroxide
~ Sodium bicarbonate
= Sodium carbonate decahydrate
~ Calcium carbonate
}

The chemical formula of washing soda is\:
{
~ NaHCO₃
~ Na₂CO₃
= Na₂CO₃·10H₂O
~ CaCO₃
}

Washing soda is manufactured by\:
{
= Solvay process
~ Haber process
~ Contact process
~ Electrolysis
}

Washing soda is used in softening\:
{
= Hard water
~ Soft water
~ Distilled water
~ Rainwater
}

Which of the following is not a use of washing soda?
{
~ Cleaning purposes
~ Making glass
= Food preparation
~ Softening water
}

//True or False

Washing soda is used in the preparation of glass and detergents. {T}

The chemical name of washing soda is sodium bicarbonate. {F}

Washing soda can be used to remove the hardness of water. {T}

Washing soda is an acidic salt. {F}

The Solvay process is used to manufacture washing soda. {T}

//Fill in the blanks

The common name of sodium carbonate decahydrate is\:
{
~ Baking soda
= Washing soda
~ Drinking soda
}

The chemical formula of washing soda is\:
{
= Na₂CO₃·10H₂O
~ Na₂CO₃·10H
~ Na₂CO₃·1H₂O
}

Washing soda is produced by the\:
{
~ Chemical
~ Physical
= Solvay
}

Washing soda is used to remove permanent\:
{
= Hardness
~ Softness
~ Thickness
} of water.

Washing soda is a compound, meaning it contains water of crystallization\:
{
= Hydrated
~ Non-Hydrated
~ Water
}

//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Chemical formula of washing soda -> Na₂CO₃·10H₂O
=Solvay process -> Method of preparation
=Use in water softening -> Removes hardness
=Use in detergent manufacturing -> Cleaning clothes
=Hydrated salt -> Contains water molecules
}


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