Helium: The Lightest Noble Gas Introduction Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Helium is the second-lightest element and the second-most abundant element in the universe, after hydrogen. Physical…
Hydrogen: The Lightest and Most Abundant Element Hydrogen is the chemical element with the atomic number 1 and is represented by the symbol H. It is the lightest and most abundant chemical element in the universe, making up about 75% of its elemental mass. Properties of Hydrogen Physical Properties Chemical Properties Occurrence and Production Hydrogen…
The metal whose oxide can be reduced by common reducing agents: (a) Copper(b) Sodium(c) Aluminium(d) Potassium Ans: (a) Copper Understanding Metal Oxide Reduction Metal oxides are compounds formed when metals react with oxygen. To extract the pure metal, the oxygen must be removed, a process known as reduction. This is achieved using a reducing agent,…
Which formula represents a saturated hydrocarbon? (a) C4H8(b) C5H12(c) C4H6(d) C5H10 Ans: (b) C5H12 Understanding Saturated Hydrocarbons Saturated hydrocarbons, also known as alkanes, are characterized by having only single bonds between their carbon atoms. This means that each carbon atom is bonded to the maximum possible number of hydrogen atoms. Let’s examine why the other…
Welcome to your best guide to excel in the ICSE Chemistry curriculum for the 2025 examination! Are you a student aiming for high marks, a teacher looking for overall support, or a parent committed to your ward’s academic superiority? You’re at the right place. Our carefully crafted ICSE Chemistry 2025 Answer Keys offer unmatched guidance…
Stuck on periodic properties, chemical bonding, or the nuances of organic chemistry? Battling the daunting realm of electrolysis and metallurgy? Worry not, ICSE 2025 chemistry candidates! This in-depth guide is your go-to last-minute study aid, created to reinforce your knowledge and give you that confidence boost in the exam. We will tackle the fundamentals, from…
The release of the ISC Chemistry 2025 answer key is a highly anticipated event for students who have appeared for the examination. 1 This document serves as a crucial tool for self-evaluation, allowing candidates to gauge their performance and estimate their potential scores. Typically, several reputable educational websites and coaching institutes publish unofficial answer keys…
Welcome, ICSE Chemistry aspirants! As you embark on your journey to conquer the 2025 board exam, meticulous preparation is your greatest ally. This comprehensive collection of 200 pivotal questions is meticulously crafted to align with the latest ICSE syllabus and exam pattern. It’s your ultimate toolkit to not just familiarize yourself with the types of…
Organic Chemistry is one of the most important and scoring subjects in the ISC Class 12 curriculum. However, many students find it challenging due to its complex reactions, mechanisms, and vast amount of theory. In the last days leading up to the exams, it’s important to focus on key concepts, strategies, and efficient revision techniques…
One mole ammonium dichromate when heated decompose to form one mole of chromic oxide, one mole of nitrogen and four moles of water. (NH4)2Cr2O7 → Cr2O3 + N2 + 4H2O
