इलेक्ट्रोकेमेस्ट्री ELECTROCHEMISTRY

प्रश्न १ -
निकिल के विद्युत लेपन को समझाइए?
उत्तर -- 
निखिल के विद्युत लेपन में निकेल की छड़ को एनोड तथा जिस वस्तु पर परत चढ़ाने होती है, उसे कैथोड बनाते हैं। विद्युत अपघट्य 30 % निखिल सल्फेट , 2 % निखिल क्लोराइड तथा एक 1.2 % बोरिक अम्ल का मिश्रण होता है।
विलियन का पीएच 5.5 से 5.7 होता है पुलिस डॉग इस बात का तापक्रम 35 से 40 डिग्री सेल्सियस तथा विद्युत धारा का घनत्व 1-2.5 एंपियर प्रति सेंटीमीटर स्क्वायर होता है। निकल के विद्युत लेपन को निम्नलिखित अभिक्रिया द्वारा समझाया जा सकता है।

समतल सतह पर निकिल की परत एक समान जमती है परंतु का समतल सतह पर विद्युत लेपन करने के लिए निकिल की दो परतों के मध्य कॉपर की एक परत चढ़ाई जाती है।

The language of science

College student must read books written in English. Most students have difficulty with test book in English, because there are many words in this books, and because the new words are often long and strange. This course will help you to learn the new words you need you in your college work.
when you open a science book, the first thing why you find is that the science book uses many special words in a state of the common words you learn at school. Instead of of top or top., The science book uses the words effects. In the same way, the bottom is the base anything at the side is lateral, anything slanting is oblique you, upright is vertical or perpendicular, flat is horizontal at the age of or wandering is the the periphery.
there is reason for this. Think of the word pad, for example, the word flat sometimes means level, that is horizontal, but we can also say that the face of a wall is flat, that is smooth, science writers do not like using common words which have more than one meaning, they prefer special words with more exam meanings words like horizontal let us take another example, I am a say that something is Hollow and by this I mean one of two things, namely that it is empty or that is shaped like a ball full stop for the second meaning of the scientist will use one of the two exact words concave and convex, that is, the scientist will so how the curved surface is turned towards us if we see the the inside it is concave, and if we see the outside it is convex stops in the world concave you can see e the word cave and you probably no the word q – a hollow place a hole in a hillside. The word hole and have two meanings also a person many have a hole in tooth, a hollow please, can also a hole thoda dear. A scientist would call the first hole cavity and II perforation scientist calls the queen disc and the earth a sphere.
however, you will find that my knees and test have the habit of using special words even when the common words are just as a good. Instead of to get a writer uses to to acquire, instead of another an additional, for an year he writes in proximity to in other words, many science writers use the English language badly, but we have to read their books please use this words, instead of on subsequent occasion if you mean many say many, not numerous.