Allergies are an immune system reaction to substances called allergens. The cause a range of symptoms from a stuffy nose to itchy eyes to difficulty breathing. How long allergies last varies based on ...

"This reaction should be observed in the upper atmosphere of Mars." Scientists have discovered a new way oxygen can form in carbon-dioxide-rich atmospheres of worlds beyond our own ...

If energy is released by a reaction, the reaction is exothermic. If energy is absorbed by a reaction, the reaction is endothermic. When petrol burns via a combustion reaction, energy released can be ...

Check here the JEE Mains 2025 Chemistry study strategy PDF. Get notes, important chapters for Class 11 and 12, easy and ...

A RECENT letter by Godsave 1 described experiments on the combustion-rates of single liquid-fuel droplets. The general case of the combustion of liquid fuel in gas streams is being studied at this ...

Reactions to a recent immunization (vaccine) Most are reactions at the shot site (such as pain, swelling, redness) General reactions (such as a fever or being fussy) may also occur ...

Sarah Vine and Andrew Pierce bring their own no-holds-barred opinions, insights and reaction (clue is in the title) to the biggest stories of the week. New episodes every Wednesday, wherever you ...

Dynamic equilibrium is a big idea in chemistry that allows chemists to increase the yield of chemical reactions through factors such as temperature, pressure, and concentration. An important principle ...

When a substance takes fire in the atmosphere without being exposed to intense or high heat, the action is called " spontaneous combustion." Phosphorus is the only common substance which is ...

When metals react with oxygen, metal oxides are formed. The speed of the reaction depends on the reactivity of the metal. Watch this video for a practical demonstration of reacting metals with oyxgen.

Example: The alkane series (CnH2n+2 ... showing similar chemical behaviour like combustion. Reaction with Sodium Reacts to form sodium ethoxide and hydrogen gas Reacts to form sodium ethanoate ...