NCERT Solutions for Class 7 Science Chapter 5
Important NCERT Questions
7th Chapter 5 Acids, Bases and Salts
NCERT Books for Session 2022-2023
CBSE Board and State Board
Questions No: 2
Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?
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Bases turn red litmus blue, so nature of ammonia is basic.
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Ammonia, commonly found in household items like window cleaners, demonstrates basic or alkaline properties. Its ability to turn red litmus paper blue indicates its alkaline nature.
Key points about ammonia’s basic nature:
1. Alkalinity: When dissolved in water, ammonia produces hydroxide ions (OH⁻). This property allows it to turn red litmus paper blue, confirming its alkaline nature.
2. pH Value: Ammonia solutions typically have a pH greater than 7, indicating their basicity. A higher pH signifies a higher concentration of hydroxide ions compared to hydrogen ions.
3. Household Use: Due to its alkaline properties, ammonia is effective in household cleaning products, like window cleaners, for its ability to dissolve dirt and grime.
4. Caution: Concentrated ammonia can be irritating to the skin, eyes, and respiratory system. Hence, proper handling and ventilation are necessary when using products containing ammonia.
In conclusion, ammonia’s capacity to turn red litmus paper blue confirms its basic or alkaline nature, making it a valuable component in various household cleaning solutions.