Important Salts — Set 3
Chemistry · महत्वपूर्ण लवण · Questions 21–30 of 40
What is the primary chemical component of common salt?
Correct Answer: C. Sodium Chloride
Sodium Chloride is the chemical name for common salt used in daily cooking. It is a neutral salt formed from a strong acid and a strong base. This salt is essential for maintaining the fluid balance in the human body.
Which salt is used as a chemical name for 'Baking Soda'?
Correct Answer: B. Sodium Hydrogen Carbonate
Sodium Hydrogen Carbonate is the scientific name for the common kitchen ingredient baking soda. It is a mild non-corrosive basic salt used in cooking and cleaning. It is produced industrially using the Solvay process.
Which salt is used as a disinfectant to kill germs in drinking water?
Correct Answer: D. Bleaching Powder
Bleaching Powder releases chlorine gas which acts as a powerful disinfecting agent. This process makes the water safe for human consumption by eliminating harmful bacteria. It is also known chemically as calcium oxychloride.
What is the chemical formula for 'Washing Soda'?
Correct Answer: B. $Na_2CO_3 \cdot 10H_2O$
The correct answer is '$Na_2CO_3 \cdot 10H_2O$'. Washing Soda is sodium carbonate decahydrate, meaning it contains ten molecules of water. It is a basic salt used for removing stubborn stains and softening hard water. Without the water of crystallization, it is simply called anhydrous sodium carbonate.
Gypsum is a salt of which metal?
Correct Answer: C. Calcium
Gypsum is a naturally occurring mineral salt of calcium, specifically calcium sulfate dihydrate. When it is heated to a specific temperature, it loses water to form Plaster of Paris. It is widely used in the construction industry for making cement.
Which salt is used to make 'Glaubers Salt'?
Correct Answer: D. Sodium Sulfate
Glauber's salt is the common name for sodium sulfate decahydrate. It was discovered by the chemist Johann Rudolf Glauber in the 17th century. It is used in various industrial processes, including the manufacture of detergents.
Which salt is used in the manufacture of gunpowder?
Correct Answer: D. Potassium Nitrate
Potassium Nitrate acts as an oxidizing agent in the traditional mixture of gunpowder. It provides the oxygen necessary for the rapid combustion of sulfur and charcoal. It is also known in older texts as saltpeter.
What is the chemical name of 'Chile Saltpeter'?
Correct Answer: A. Sodium Nitrate
Sodium Nitrate is called Chile Saltpeter because large natural deposits of it were found in Chile. It is an important salt used in the fertilizer industry to provide nitrogen to soil. It differs from ordinary saltpeter, which is potassium-based.
Which salt is known as 'Lunar Caustic'?
Correct Answer: C. Silver Nitrate
Silver Nitrate is called Lunar Caustic because of its ability to burn organic tissue and its historical link to the moon. It is used in laboratory testing for halides and in medical cauterization. It should be handled with care as it can cause dark stains on skin.
Which salt is commonly found in 'Smelling Salts' used to revive fainting people?
Correct Answer: D. Ammonium Carbonate
Ammonium Carbonate releases ammonia gas which irritates the nose and lungs to trigger a breathing reflex. This stimulation helps a person regain consciousness after fainting. It is one of the oldest known medicinal applications of salts.