The question asks to identify the type of forces of attraction and repulsion that exist between interacting particles (atoms and molecules). We need to recall the definitions of the given options and determine which one best fits the description.
C) Intermolecular forces are the forces of attraction and repulsion between interacting particles (atoms and molecules). These forces determine the physical properties of substances.
The question asks to identify the term for attractive intermolecular forces. We need to recall the different types of fundamental forces and interactions in physics and chemistry to determine the correct answer.
Correct Option: A) Van der Waals force — These are weak, short-range attractive forces that occur between molecules. They are responsible for many physical properties of substances, such as boiling points and solubility.
The question asks to identify the type of attractive force that exists between an ion and a dipole. We need to recall the different types of intermolecular forces and their definitions.
The question asks to identify the correct statements regarding the applications of green hydrogen. We need to evaluate each statement based on current technological capabilities and potential uses of green hydrogen.
Hydrogen can indeed be used as a fuel in internal combustion engines. While modifications are often required for existing engines (e.g., to handle hydrogen's different combustion properties and prevent NOx emissions), hydrogen-powered internal combustion engines are a known technology. Companies like BMW have experimented with hydrogen internal combustion engines, and it's considered a potential pathway for decarbonizing transport, especially for heavy-duty vehicles or niche applications where fuel cells might be less suitable.
Blending hydrogen with natural gas (often referred to as 'hydrogen blending' or 'power-to-gas') is a well-researched and increasingly implemented strategy. This blend can be used in existing natural gas infrastructure, including power plants, industrial furnaces, and even domestic heating systems, to reduce the carbon footprint of natural gas consumption. The percentage of hydrogen that can be blended varies depending on the infrastructure's compatibility, but it is a viable application.
This is one of the most prominent and actively developed applications for hydrogen. Hydrogen fuel cells convert hydrogen and oxygen into electricity, with water as the only byproduct. This electricity then powers an electric motor, making fuel cell electric vehicles (FCEVs) a zero-emission alternative to conventional vehicles. Many car manufacturers are investing heavily in FCEV technology for passenger cars, buses, and trucks.
C) All three
All three statements accurately describe current or potential applications of green hydrogen. Green hydrogen, produced via electrolysis using renewable energy, has diverse uses across transportation, power generation, and industrial sectors, making it a crucial component of future decarbonization strategies.
The question asks why atoms and nonpolar molecules are electrically symmetrical and lack a dipole moment. This characteristic is directly related to the distribution of their electronic charge cloud. We need to identify the term that correctly describes this distribution.
Correct Option: D) Symmetrically — Atoms and nonpolar molecules have no dipole moment because their electronic charge cloud is symmetrically distributed. This means the center of positive charge coincides with the center of negative charge, resulting in no net separation of charge.
The question asks about the specific name for the force of attraction between two temporary dipoles. This falls under the category of intermolecular forces, specifically Van der Waals forces. We need to identify the correct terminology for these forces.
Correct Option: C) Both a and b
The force of attraction between two temporary dipoles is known as both London force and Dispersion force. These terms are used interchangeably to describe the weakest type of intermolecular force, which arises from instantaneous fluctuations in electron distribution, creating temporary dipoles that induce dipoles in neighboring molecules.