1. Effect of temperature on reaction rate: ⇒ As the temperature increases, the average energy of the reaction increases, hence rate of reaction increases. ⇒ As a common rule, for every 10° rise of temperature, the rate of reaction will increase by 2 (or) 3 times of initial value. ⇒ According to Arrhenius concept: η Read more about Temperature dependence of the rate of a reaction[…]
Puzzle 1: Replace one letter in each step to change the word COLD to its opposite. Each step has to be a legitimate word. COLD ? ? ? ? Puzzle 2: Fill in the sequence: ND, JF, MA, ?, ?, SO Puzzle 3: Fill in the blanks in the following sentence with an anagram: Almost a ________ started Read more about Brain Teaser 8[…]
Michael Faraday (1791-1867) introduced the concept of lines of force for visualizing electric (and magnetic) fields. An electric line of force is an imaginary curve drawn in such a way that the tangent at any point gives the direction of the electric field at that point. Lines of force are imaginary, but the field they Read more about Electric Lines of Force[…]
Pairs of tangents: From a given point two tangents can be drawn to a circle which are real and distinct, coincident or imaginary according as the given point lies outside on or inside the circle.The combined equation of the pair of tangents drawn from point P(x₁, y₁) to the circle x² + y² = a² Read more about Tangents[…]
These are governed by the Faraday’s laws of electrolysis First law of Electrolysis: The amount of chemical change produced is proportional to the quantity of electric charge passing through an electrolytic cell. Greater the number of moles of electrons transferred, the greater the mass of the products. W α Q (charge) Charge = (current) ✕ time W Read more about Quantitative Aspects of Electrolysis[…]
This apparent change in frequency of the wave it due to motion of the source or the observer is called Doppler Effect d. Observer Stationary and Source Moving: Now suppose the observer is at rest with respect to the medium and the source moves towards the observer at a speed u which is less than Read more about Doppler Effect[…]
Intersection of straight line and a circle: Let the equation of circle be x² + y² = a² and the equation of the line be y = mx + c then When points of intersection are real and distinct: Then length of perpendicular from centre should be less the radius. ∴ . When points of Read more about Tangent Equation of Circle & Point of Contact[…]
1. Zero order reactions: ⇒ Order of the reaction is zero. ⇒ The reaction in which the rate of reaction is independent of concentration of the reactants. ⇒ Rate of reaction remains constant during the course of reaction. ⇒ No concentration term in the rate law. A → Products Initially t = 0 a 0 Read more about Integrated Rate Equations[…]
First let us consider a uniform field, for which the lines of force are parallel and equidistance from each other. Let A and B be two points in a uniform electric field of intensity E.Let WAB, be the work done to carry a test charge q0 from A to B. Let the potential at A Read more about Relation between Electric Intensity and Potential[…]
Square Roots of a Complex Number: Let a + ib be a complex number such that √(a + ib) = x + iy, where x and y are real numbers.If b is positive . If b is negative . Geometrical representation of Conjugate of a Complex Number: Let z = x + iy be a Read more about Square Roots & Geometrical representation of Conjugate of a Complex Number[…]