Chemical Change And Physical Change solution

Chemical Change And Physical Change solution:

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes occur when objects or substances undergo a change that does not change their chemicalcomposition. This contrasts with the concept of chemical change in which the composition of a substance changes orone or more substances combine or break up to form new substances. In general a physical change is reversibleusing physical means. For example salt dissolved in water can be recovered by allowing the water to evaporate. Reactants must be moving fast enough and hit each other hard enough for a chemical reaction to take place.Increasing the temperature increases the average speed of the reactant molecules.As more molecules move faster,the number of molecules moving fast enough to react increases, which results in faster formation of products.

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Key Lessons from the Movie- ‘3 Idiots

Key Lesson from 3Idiot Movie Key Lessons from the Movie- ‘3 Idiots’: Every movie has a meaning, carrying a message. However, it depends upon the viewer to grab the message and apply the same in life. The bollywood blockbuster ‘3 Idiots’ is an inspiring story of three students Rancho, Farhan Qureshi and Raju Rastogi who have joined the Imperial College of Engineering. In brief, the five key lessons that we can draw from the movie can well be described below. Chase excellence, instead of success, and success will follow and run after you: Rancho, who is an orphaned boy, had got interest in engineering since his early childhood. He, right from the very beginning till the end, sticks to his conviction that it is not success in life but excellence that must be pursued with passion. His words, ‘make your passion, your profession’ sets the tone around which the plot of the movie is woven. Rancho pursues his goal with passion and hence emerges as the student of the...

Benefits of Social Media for Students

Benefits of Social Media for Students Benefits of Social Media for Students Though it has been blamed that social media platforms have become distracting tools for students as they are not able to pay full attention and do justice to their studies once they get addicted to these technological platforms. Instead of becoming repository of information they get through school education they are more occupied with superfluous knowledge offered by social media. However on close observation it is revealed that these perceptions about social media is erroneous and misplaced. Social media platforms like facebook, twitter and instagram and others are interactive tools which give us including students wonderful opportunities to interact with one another. Look at the system of remote digital classroom system which help the educating institutes to impart education to the students through digital mediums from remote locatio...

Element तत्त्व

Element An element is a material that consists of a single type of atom, while a compound consists of two or more types ofatoms.The nucleus is the very dense region consisting of protons and neutrons at the center of an atom. It was discoveredin 1911 as a result of Ernest Rutherford's interpretation of the 1909 Geiger–Marsden gold foil experiment. Theproton–neutron model of the nucleus was proposed by Dmitry Ivanenko in 1932. Almost all of the mass of anatom is located in the nucleus, with a very small contribution from the electron cloud. तत्त्व एक तत्व एक ऐसी सामग्री है जिसमें एक ही प्रकार का परमाणु होता है, जबकि एक यौगिक में दो या दो से अधिक प्रकार के परमाणु होते हैं। नाभिक एक परमाणु के केंद्र में प्रोटॉन और न्यूट्रॉन से मिलकर बहुत घना क्षेत्र है। 1909 की अर्नेस्ट रदरफोर्ड की व्याख्या के परिणामस्वरूप इसे 1911 में खोजा गया था। द न्यूट्रीस के न्यूट्रॉन-न्यूट्रॉन मॉडल को दिमित्री इवानेंको द्वारा 1932 में प्रस्तावित किया गया था। एनाटोम के लगभग सभी द्रव्यमान नाभिक में स्...

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