Which one among the following chemicals is used as washing soda ?

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Q: 69 (NDA-II/2017)

Which one among the following chemicals is used as washing soda ?

question_subject: 

Science

question_exam: 

NDA-II

stats: 

0,30,44,14,12,30,18

keywords: 

{'washing soda': [0, 0, 0, 1], 'sodium carbonate': [0, 0, 0, 1], 'calcium carbonate': [0, 0, 1, 4], 'chemicals': [0, 0, 1, 1], 'calcium bicarbonate': [0, 0, 1, 3], 'sodium bicarbonate': [0, 0, 2, 1]}

The correct answer is option 3: Sodium carbonate. Sodium carbonate is commonly known as washing soda. It is a chemical compound that has the formula Na2CO3.

Option 1: Calcium carbonate is not used as washing soda. It is a different compound that is commonly found in rocks and minerals, such as limestone and marble. It is used in various industries, including the manufacturing of cement and as a dietary supplement.

Option 2: Calcium bicarbonate is not used as washing soda either. It is a compound that forms when calcium carbonate reacts with carbonic acid. It is commonly found in natural spring waters and is responsible for the "hardness" of water.

Option 4: Sodium bicarbonate is different from sodium carbonate and is commonly known as baking soda. It is used in baking, as a household cleaner, and as an antacid.

In summary, sodium carbonate, or option 3, is the correct chemical compound used as washing soda.