Question

Позначте хімічні явища «+». 3. утворення хмар горіння сірника плавлення скла розшарування суміші води та оли бродіння сливового соку скисання молока вибух природного газу скисання виноградного соку почорніння срібної ложечки затвердіння розплавленого парафіну гниття опалого листя кування заліза конденсація парів води кипіння води Усно поясніть свій вибір кипіння підсолодженої води підгоряння їжі на сковорідці горіння спирту плавлення шматочка олова танення льоду подрібнення шматочка крейди притягання заліза до магапу плавлення сірки тасіння вапна вицвітання» тканини на сонці​

Answer 1

Ответ:

поставила плюси перед словами

Объяснение:

утворення хмар горіння сірника плавлення скла +розшарування суміші води та оли +бродіння сливового соку +скисання молока +вибух природного газу +скисання виноградного соку +почорніння срібної ложечки затвердіння розплавленого парафіну +гниття опалого листя кування заліза конденсація парів води кипіння води кипіння підсолодженої води підгоряння їжі на сковорідці +горіння спирту плавлення шматочка олова танення льоду подрібнення шматочка крейди притягання заліза до магапу плавлення сірки +тасіння вапна вицвітання» тканини на сонці​

Answer 2

Formation of Clouds

Cloud formation is a chemical phenomenon that occurs when water vapor in the air condenses into visible water droplets or ice crystals. This process is influenced by factors such as temperature, humidity, and the presence of condensation nuclei. When warm, moist air rises and cools, it reaches its dew point, causing water vapor to condense and form clouds [[1]].

Ignition of a Matchstick

The ignition of a matchstick involves a chemical reaction between the sulfur on the match head and the potassium chlorate in the matchstick's striking surface. When the matchstick is struck against the surface, friction generates enough heat to initiate the reaction, resulting in the production of heat, light, and flame [[2]].

Melting of Glass

The melting of glass is a physical process rather than a chemical one. Glass is made by heating a mixture of silica, soda ash, and limestone to high temperatures until it becomes molten. The molten glass can then be shaped and cooled to form solid glass objects [[3]].

Separation of Water and Oil

The separation of a mixture of water and oil is a physical process known as phase separation. Water and oil are immiscible, meaning they do not mix together. When a mixture of water and oil is left undisturbed, the two liquids will separate into distinct layers due to differences in density. Water, being denser, will settle at the bottom, while oil will float on top [[4]].

Fermentation of Plum Juice

The fermentation of plum juice is a chemical process that occurs when the natural sugars in the juice are converted into alcohol and carbon dioxide by yeast or bacteria. This process is commonly used to produce alcoholic beverages such as plum wine or plum brandy [[5]].

Souring of Milk

The souring of milk is a chemical process called lactic acid fermentation. It occurs when bacteria, such as Lactobacillus, convert lactose (the sugar in milk) into lactic acid. This acidification causes the milk to taste sour and changes its texture [[6]].

Explosion of Natural Gas

The explosion of natural gas occurs when a mixture of natural gas and air is ignited in the presence of an ignition source. Natural gas is primarily composed of methane, which is highly flammable. When ignited, methane reacts with oxygen in the air, releasing a large amount of heat and expanding rapidly, causing an explosion [[7]].

Fermentation of Grape Juice

The fermentation of grape juice is a chemical process that occurs when yeast converts the sugars in the juice into alcohol and carbon dioxide. This process is used to produce wine and other alcoholic beverages. The fermentation process can be controlled to produce different types of wines with varying levels of sweetness and alcohol content [[8]].

Tarnishing of a Silver Spoon

The tarnishing of a silver spoon is a chemical reaction that occurs when silver reacts with sulfur compounds in the air, forming a layer of silver sulfide on the surface of the spoon. This reaction is accelerated in the presence of moisture and certain pollutants in the air [[9]].

Solidification of Molten Paraffin

The solidification of molten paraffin is a physical process known as freezing or solidification. Paraffin wax, which is a mixture of hydrocarbons, melts at a relatively low temperature and solidifies when cooled. The cooling process causes the molecules in the molten paraffin to arrange themselves into a solid structure, resulting in the solidification of the wax [[10]].

Decomposition of Fallen Leaves

The decomposition of fallen leaves is a biological process rather than a chemical one. When leaves fall to the ground, they are broken down by microorganisms such as bacteria and fungi. These microorganisms feed on the organic matter in the leaves, breaking it down into simpler compounds and releasing nutrients back into the soil [[11]].

Boiling of Iron

The boiling of iron is not a common occurrence under normal conditions. Iron has a high melting point of 1538 degrees Celsius and a boiling point of 2862 degrees Celsius. However, at extremely high temperatures, iron can vaporize and boil, similar to other metals [[12]].

Condensation of Water Vapor

The condensation of water vapor is a physical process that occurs when water vapor cools and changes from a gaseous state to a liquid state. This process is commonly observed when warm, moist air comes into contact with a cool surface, such as a mirror or a glass of cold water. The cooling causes the water vapor to lose energy and condense into water droplets [[13]].

Boiling of Water

The boiling of water is a physical process that occurs when water is heated to its boiling point, which is 100 degrees Celsius at sea level. At this temperature, the energy supplied to the water causes the water molecules to gain enough energy to overcome the forces holding them together, resulting in the formation of water vapor bubbles and the conversion of liquid water into steam [[14]].

Boiling of Sweetened Water

The boiling of sweetened water is similar to the boiling of plain water. The addition of sugar to water does not significantly affect the boiling point of the mixture. However, the presence of sugar can affect the boiling process by increasing the viscosity of the liquid and potentially causing foaming or caramelization if the heat is too high [[15]].

Frying Food in a Pan

The process of frying food in a pan involves both chemical and physical changes. When food is heated in a pan, the heat causes chemical reactions such as the Maillard reaction, which gives the food its characteristic browned and flavorful crust. Additionally, the heat causes physical changes such as the evaporation of moisture from the food and the absorption of oil, resulting in changes in texture and flavor [[16]].

Combustion of Alcohol

The combustion of alcohol, such as ethanol, involves a chemical reaction with oxygen in the air. When alcohol vapor or a liquid alcohol is ignited, it reacts with oxygen to produce carbon dioxide, water, and heat. This process is exothermic, meaning it releases energy in the form of heat and light [[17]].

Melting of Lead

The melting of lead is a physical process that occurs when solid lead is heated to its melting point, which is 327.5 degrees Celsius. At this temperature, the energy supplied to the lead causes the metal to transition from a solid state to a liquid state [[18]].

Crushing a Piece of Chalk

The crushing of a piece of chalk is a physical process that involves breaking the solid chalk into smaller pieces. This process does not involve any chemical changes in the composition of the chalk. The resulting smaller pieces of chalk retain the same chemical properties as the original piece [[19]].

Attraction of Iron to a Magnet

The attraction of iron to a magnet is a physical phenomenon known as magnetism. Iron is a ferromagnetic material, which means it can be magnetized and attracted to a magnetic field. The magnetic field of the magnet aligns the magnetic domains within the iron, causing it to be attracted to the magnet [[20]].

Melting of Sulfur

The melting of sulfur is a physical process that occurs when solid sulfur is heated to its melting point, which is 115 degrees Celsius. At this temperature, the energy supplied to the sulfur causes the solid to transition into a liquid state [[21]].

Slaking of Lime

The slaking of lime is a chemical reaction that occurs when quicklime (calcium oxide) reacts with water to produce slaked lime (calcium hydroxide). This reaction is highly exothermic and is often used in construction and other industries to produce hydrated lime for various applications [[22]].

Discoloration of Fabric in the Sun

The discoloration of fabric in the sun is a physical process caused by the interaction of sunlight with the dyes or pigments in the fabric. Ultraviolet (UV) radiation from the sun can break down the chemical bonds in the dyes or pigments, leading to fading or discoloration of the fabric over time [[23]].

Note: The information provided is based on general knowledge and may vary depending on specific circumstances or materials involved.