Question

please solve the first 3 questions

Answer 1

no.2- A reaction between an acid and a base , resulting in formation of salt and water is called neutralisation reaction . Two example are 1 . Naoh+ Hcl - Nacl+H2O ; 2koh +H2so4 - k2so4 +2H2O

Answer 2

$\huge\mathfrak\red{Answer :}$

$\textbf{Ans. 1)}$

Plaster of Paris is stored in a moisture proof container because when it reacts with air (moisture) it produces a solid hard substance called Gypsum.

$CaSO_{4}.2H_{2}O$ -----> $CaSO_{4}$$\dfrac{1}{2}$$H_{2}O$ + $1\:\times\:\dfrac{1}{2}H_{2}O$
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$\textbf{Ans. 2)}$

When acid and base both react with each other and produce salt and water is known as Neutralization Reaction.

Ex :-

$HCl\:+\:NaOH$ ----> $NaCl\:+\:H_{2}O$

$H_{2}SO_{4}\:+\:Mg(OH)_{2}$ ----> $NaCl\:+\:H_{2}O$
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$\textbf{Ans. 3)}$

Two uses of Baking soda are :-

* Used in fire extinguishers.

* Used as antacid to remove acidity.

Two uses of Washing soda are :-

* Used in paper and textile industry.

* Used in manufacturing of soap, borax etc.
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