Question

❤️❤️ Give lovely answer...

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✌️✌️ QUESTION ✌️✌️
Class 10...​

Answer 1

$\huge \boxed{ \underline{ \underline{ \bf{Answer}}}}$

⏭️ a) When we rake food, some food particles remain in the mouth after eating. Bacteria present in the mouth produce acid by the degradation of sugar and food particles remaining in the mouth after eating. This lowers the pH in mouth and results in the tooth decay. Tooth decay starts when pH of the mouth becomes lower than 5.5. Therefore, to prevent tooth decay, we use tooth pastes which are generally basic in nature. Thus this prevent tooth decay.

⏭️ b) Baking powder contains sodium hydrogen carbonate and mild edible acids like tartaric acid or citric acid. When baking powder is added to dough and heated, sodium hydrogen carbonate decomposes to give carbon dioxide and sodium gas of acid. Carbon dioxide bubbles out causing the bread and cakes to rise. This makes them soft and spongy.

$\sf{NaHC{O}_{3} + {H}^{+} \rightarrow\: {CO}_{2}\: + \:{H}_{2}O + Sodium\: salt\: of\: acid.}$

Answer 2

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➽a) When we rake food, some food particles remain in the mouth after eating. Bacteria present in the mouth produce acid by the degradation of sugar and food particles remaining in the mouth after eating. This lowers the pH in mouth and results in the tooth decay. Tooth decay starts when pH of the mouth becomes lower than 5.5. Therefore, to prevent tooth decay, we use tooth pastes which are generally basic in nature. Thus this prevent tooth decay.

➽b) Baking powder contains sodium hydrogen carbonate and mild edible acids like tartaric acid or citric acid. When baking powder is added to dough and heated, sodium hydrogen carbonate decomposes to give carbon dioxide and sodium gas of acid. Carbon dioxide bubbles out causing the bread and cakes to rise. This makes them soft and spongy.

$\sf{NaHC{O}_{3} + {H}^{+} \rightarrow\: {CO}_{2}\: + \:{H}_{2}O + Sodium\: salt\: of\: acid.}$