Which of the following factors affects the resistance of a conductor? (A) Length of the conductor(B) Cross-sectional area of the conductor(C) Temperature of the conductor(D) All of the above Answer: (D) All of the above Explanation: Resistance (R) is given by the formula: R = ρ L / A Where: L = Length of the … Read more
In 1893, Swiss chemist Alfred Werner put up a novel theory to describe the bonding and structure of coordination molecules. He received the 1913 Nobel Prize in Chemistry for his groundbreaking breakthrough. Prior to Werner’s research, scientists struggled to understand how metal ions formed complex compounds by bonding with other molecules. His idea established the … Read more
The interesting device known as a heat engine holds the solution. Much of the modern world is silently powered by heat engines, which are ubiquitous. However, what are they and how do they operate? Engine What is a Heat Engine? Heat engine is device in which a system is made to undergo a cyclic process … Read more
1.Coulomb’s law is applicable for which type of charges? (A) Moving charges(B) Stationary charges(C) Both moving and stationary charges(D) None of these Answer: (B) Stationary charges Explanation: Coulomb’s law gives the force between two point charges that are stationary. It states that the electrostatic force between two charges is directly proportional to the product of … Read more
When a thermodynamic system transits from one state to another, it goes through a number of changes, which are called as thermodynamic processes. Variables are pressure, volume, temperature, and internal energy are frequently altered during these operations. In physics, engineering, and chemistry, thermodynamic processes are vital because they help us to understand how energy is … Read more
1.Which of the following is not a d-block element? (a) Zn(b) Sc(c) Cu(d) Pb Answer: (d) Pb Explanation: Lead (Pb) is a p-block element, whereas Zn, Sc, and Cu belong to the d-block. 2. Which transition metal has the highest melting point? (a) Fe(b) W(c) Ti(d) Zn Answer: (b) W (Tungsten) Explanation: Tungsten has the highest melting … Read more
The studies of heat, energy and work is called thermodynamics. It is essential to know how energy moves between systems and affects the state of matter. Heat, internal energy and work are the three core ideas of thermodynamics. Heat A difference in temperature causes heat, a type of energy, to move from one body to … Read more
The actinoids are also known as actinides and a group of 15 metallic elements with atomic numbers 89–103 that range from actinium (Ac) to lawrencium (Lr) in the periodic table. These elements are recognized for their radioactive characteristics and are found in the periodic table’s f-block. Metallic elements Position in the Periodic Table Like lanthanoids, … Read more
Zeroth Law of Thermodynamics is essential to understand thermal equilibrium and measuring temperature. It is known as the “Zeroth Law” because it introduces the fundamental idea of temperature and constitutes the basis of thermodynamics, although having been developed after the first and second principles of thermodynamics. Zeroth Law The Zeroth Law of Thermodynamics states: “If … Read more
Lanthanoids are also called as lanthanides and are a group of 15 elements in the periodic table, ranging from Lanthanum (La, atomic number 57) to Lutetium (Lu, atomic number 71). These elements belong to the f-block of the periodic table and are also known as rare earth metals. Periodic table The name “lanthanoids” comes from … Read more