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Basic Principles in Chemistry, States of Matter and Atomic Structure (Old NCERT) Video Lecture | Crash Course for NEET
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FAQs on Basic Principles in Chemistry, States of Matter and Atomic Structure (Old NCERT) Video Lecture - Crash Course for NEET
| 1. What are the basic principles in chemistry? |  |
Ans. The basic principles in chemistry include the law of conservation of mass, the law of definite proportions, the law of multiple proportions, and the law of combining volumes. These principles help us understand the behavior and interactions of different substances and form the foundation of chemical reactions and equations.
| 2. What are the different states of matter? | |
Ans. The different states of matter are solid, liquid, and gas. Solids have a fixed shape and volume, liquids have a definite volume but can change shape, and gases have neither a fixed shape nor volume and can expand to fill their container. Additionally, there is a fourth state of matter called plasma, which occurs at extremely high temperatures and consists of ionized particles.
| 3. What is atomic structure? | |
Ans. Atomic structure refers to the arrangement and composition of atoms, which are the basic building blocks of matter. Atoms consist of a central nucleus containing protons and neutrons, surrounded by orbiting electrons. The protons carry a positive charge, neutrons are neutral, and electrons carry a negative charge. The number of protons in an atom determines its atomic number and defines its chemical properties.
| 4. What is the law of conservation of mass? | |
Ans. The law of conservation of mass states that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products. This means that matter is neither created nor destroyed during a chemical reaction, but rather rearranged into new substances. This principle is a fundamental concept in chemistry and helps us balance chemical equations.
| 5. What is the law of definite proportions? | |
Ans. The law of definite proportions states that a chemical compound always contains the same elements in the same fixed ratio by mass. This means that the composition of a compound is constant, regardless of the source or method of preparation. For example, water (H2O) will always have a 2:1 ratio of hydrogen to oxygen by mass, regardless of its source. This law provides insight into the composition and stoichiometry of chemical compounds.
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Nov 13, 2024 Last updated |
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