First Law of Thermodynamics
The first law of thermodynamics is one of the three fundamental laws of thermodynamics. It is derived from energy conservation but stated in a different and more useful manner for … Read more
Jyoti Bashyal
Sulfur (S) Element- History, Properties, Uses, Reactions, Safety
Sulfur is multivalent non-metal, abundant, and odorless. Pure sulfur is a tasteless, odorless, brittle, pale yellow solid that is a poor conductor of electricity and insoluble in water. It can … Read more
Atom- Definition, History, Structure, and Subatomic Particles
Atom is the smallest unit of matter that can be divided without releasing electrically charged particles. It is also the smallest unit of matter with the properties of a chemical … Read more
Atoms and Atomic Structure- Multiple Choice Questions (MCQ)
a) Which of the following models does not correspond to the Thomson Model of Atom? plum pudding model watermelon model raisin pudding model nuclear model b) Rutherford in his atomic … Read more
Ammonia- Definition, Properties, Preparation, Uses
Nitrogen is a nonmetal in Periodic Table Group V. It exists in the atmosphere as a gaseous element composed of diatomic molecules. Nitrogen makes up approximately 78 percent of the … Read more
Nitrogen Element- Definition, Occurrence, Properties, Uses, Effects
The element Nitrogen belongs to Periodic Table Group 15. It is a nonmetallic element that accounts for approximately 78 percent of the Earth’s atmosphere. It exists in the form of … Read more
Chlorine Element- Definition, Properties, Reactions, Uses, Effects
The element Chlorine is the halogen located in group 17 in the periodic table. Chlorine is the chemical element that constitutes about 0.017 percent of the earth’s crust. Chlorine is … Read more
Chemical Properties of Halogen Elements and Hydrogen Halides
Group 17 of the periodic table is named Halogens as they all produce sodium salts with similar properties. The chemical properties of halogens [ fluorine (F), chlorine (Cl), bromine (Br), … Read more
Reactions of Halide Ions (with sulphuric acid, silver nitrate, ammonia)
A halide ions is a negatively charged anion formed by a halogen atom. They have a (-1 ) charge. A halide is also a compound composed of a halogen atom … Read more