Your Ultimate Chemistry Learning Destination
Your Ultimate Chemistry Learning Destination
Correct answer : (3) It can be solved as in the two following ways.. according to the of Faraday’s first law, the amount of substance deposited at an electrode or gas evolved or solute desolute is directly proportional to the quantity of electricity is passing through it. Passing of […]
Correct answer: (2) CaCN₂ + Graphite. Here is some information regarding Nitrolim, Nitrolim (also known as nitrolime or lime nitrogen) is a nitrogenous fertilizer prepared by the cyanamide process. It is produced by passing nitrogen gas over heated calcium carbide (CaC₂) at high temperature (around 1000–1100°C). The reaction is: CaC₂ […]
Answer (2) Sol. F > Cl : Fluorine has higher first ionisation energy than chlorine due to its smaller atomic size, leading to greater effective nuclear charge and tighter hold on the valence electron despite higher electron-electron repulsion in F. The given order Cl > F is incorrect. tThe actual order is […]
Chemistry in everyday life Chemistry plays a significant role in our everyday life, from the food we eat and the medicines we use to the materials and products that surround us. Many concepts in chemistry, especially in topics like polymers, drugs, soaps, detergents, […]
ARRHENIUS THEORY OF ACIDS AND BASES It was proposed by Arrhenius to explain the behaviour of acids and bases in aqueous solutions. Arrhenius acid:— A substance that produces hydrogenions (H⁺) when dissolved in water. ex:(i) HCl (aq) → H⁺ (aq) + Cl⁻ (aq)(ii) H₂SO₄ (aq) → 2H⁺ (aq) + SO₄²⁻ (aq)(iii) HNO₃ (aq) → H⁺ […]
Solution :- Correct option : (1) In a free expansion, P_ext = 0 — (1) then,W = PΔV= 0 (ΔV) W = 0 — (2) Since, it is an adiabatic process, Heat is constant – q = 0 — (3) acc. to first law of thermodynamics, ΔU […]
Lanthanide contraction : ” the steady decrease in the atomic and ionic radii of lanthanides with increasing the atomic number is called Lanthanide contraction”. Atomic radii do show some irregularities but ionic radii decrease steadily from La to Lu. Causes : When we proceed from one element to the next element in Lanthanide series, the […]
Q 1: Nitrogen exhibits a maximum covalency of four. Explain. Since nitrogen is present in second period, it has no vacant ‘d’ orbital (ie. 1s² 2s² 2p³). Hence, the excitation of 2s electron into 3s is not possible. Q 2 : What are the products obtained […]
Rate constant for the first order reaction: The reaction in which the rate of reaction depends only on the concentration of one reactant is called first order reaction. The rate constant for the first order reaction can be determined in the following way, A […]
Most of the students are confusing to understand the key differences between orbit and orbital. Orbit: Orbit is a circular path in which electron is revolving around the nucleus. It represents 2-D motion of an electron. It has no directional properties. Maximum number of electrons can be accommodated in an orbit is 2n². According […]