Important Salts — Set 1
Chemistry · महत्वपूर्ण लवण · Questions 1–10 of 40
Which salt is commonly used in the purification of drinking water to remove suspended impurities?
Correct Answer: C. Potash Alum
Potash Alum is used for purification because it helps in the coagulation of suspended particles. It carries a positive charge that neutralizes the negative charge of clay particles. This salt is also chemically known as Potassium Aluminum Sulfate.
What is the chemical name of the salt used to make bread and cakes soft and spongy?
Correct Answer: A. Sodium Hydrogen Carbonate
Sodium Hydrogen Carbonate releases carbon dioxide gas when heated, which creates bubbles in the dough. This process causes the bread or cake to rise and become light. It is more commonly known in households as baking soda.
Which of the following salts is used as a dehydrating agent in the preservation of meat and fish?
Correct Answer: D. Sodium Chloride
Sodium Chloride preserves food by drawing out moisture through the process of osmosis. By reducing the water content, it prevents the growth of bacteria and microorganisms. This common salt has been used for food preservation since ancient times.
The salt used by doctors to set fractured bones and in making decorative statues is?
Correct Answer: C. Plaster of Paris
Plaster of Paris is the correct choice because it hardens into a solid mass when mixed with water. Chemically, it is Calcium Sulfate Hemihydrate. It must be stored in moisture-proof containers to prevent it from turning into Gypsum.
Which salt is an essential ingredient in the manufacture of glass, soap, and paper?
Correct Answer: A. Sodium Carbonate
Sodium Carbonate is widely used in these industries as a flux and cleaning agent. It is often referred to as washing soda or soda ash in industrial contexts. This salt is mainly produced on a large scale via the Solvay process.
What type of salt is formed when a strong acid reacts with a weak base?
Correct Answer: A. Acidic Salt
An acidic salt is formed because the strong acid dominates the neutralization process. The resulting aqueous solution of this salt will have a pH value less than seven. Ammonium chloride is a typical example of such an acidic salt.
Which salt is used in black and white photography due to its light-sensitive nature?
Correct Answer: D. Silver Bromide
Silver Bromide decomposes into silver metal and bromine gas when exposed to light. This photochemical reaction is the basis for capturing images on photographic film. It is one of the most important halides used in the imaging industry.
Which of the following salts is known as 'Blue Vitriol'?
Correct Answer: A. Copper Sulfate
Copper Sulfate is called Blue Vitriol because of its characteristic bright blue crystalline appearance. It is commonly used as a fungicide in agriculture and in electroplating. The blue color is due to the presence of water of crystallization in the molecule.
Which salt is used as an antacid to neutralize excess acid in the stomach?
Correct Answer: B. Sodium Hydrogen Carbonate
Sodium Hydrogen Carbonate is an alkaline substance that reacts with stomach acid to provide relief. This neutralization reaction produces salt, water, and carbon dioxide. It is a safe and effective remedy for mild indigestion.
The salt present in the hard protective layer of human teeth and bones is?
Correct Answer: B. Calcium Phosphate
Calcium Phosphate provides the structural strength and rigidity required for skeletal health. In teeth, it exists primarily in the form of hydroxyapatite. It is one of the most abundant mineral salts found in the human body.