The present is a time of panic. You have been under house arrest for eight long months. Your school system is temporarily closed. Although online based classes are often taken, not all students in all parts of the country get the benefit of that class.
But students are being given and receiving assignments every week to pass the next class. But due to the education of the students, they are not able to prepare the assignments in full. So I have brought the assignments among you to help the students. If you want, you can download different subjects from our website. Below are the assignments of ninth and tenth class chemistry.
Class 9 Chemistry Assignment
Natural science is a branch of science. It is the job of the natural sciences to understand or make predictions about natural phenomena by reasoning, observing or experimenting. Chemistry is a branch of natural science.
Where the structure of matter, the nature of matter and the change of matter are discussed. Around 3500 BC, solid metals were melted down into liquids and the two liquids were mixed together and then the mixture was cooled to form hard alloys. The name of this alloy is Bronze.
In ancient times, philosophers thought a lot about the structure of matter. Around 360 BC, the Greek philosopher Democritus declared that in order to break down every substance, a tiny particle could be found at the last stage that could not be broken. He named it Atom.
Other scientists oppose this idea. At that time, other philosophers, including Aristotle, thought that all matter was made up of earth, fire, water, and air. Medieval Muslim philosophers tried to create these cheap ideas of cotton, tin, and lead. They tried a little bit to create something great that would increase the life of the people.
They certainly did not succeed in that. Other scientists, including Anthony Lavoisier, Robert Boyle, Sir Francis Bacon and John Dalton, were the first to discover the true mystery of chemistry. Anthony Lavoisier is said to be the father of modern chemistry.
Class 9 Chemistry 4th Week Assignment Answer 2020 Download
Where there is matter, there is chemistry. The atmosphere contains substances of different gases. Some chemical changes are constantly taking place in the atmosphere. Different animals and plants, including humans, are made up of different types of chemicals, whether they are small microorganisms or large plants and animals.
One is the relationship of other branches of science with chemistry, a large chemical factory, in a very strange way. Just as chemistry has a relationship with biology, so does chemistry have a relationship with physics, mathematics.
Just as chemistry is discovering many necessary and valuable things, so its irrational, irrational use is causing serious damage to the environment. It is possible to take the world further through knowledge of chemistry. So we all have to take chemistry lessons.
চতুর্থ সপ্তাহের অ্যাসাইনমেন্ট প্রশ্নের সমাধান
(ক) কাপড় কাঁচার সােডার জলীয় দ্রবণ + লেবুর রস =?
(খ) ডিমের খােসা + লেবুর রস =?
উপরের দুটি বিক্রিয়া হাতে কলমে সম্পন্ন কর এবং নিচের প্রশ্নগুলাের উত্তর দাও:
১। রাসায়নিক সমীকরণের সাহায্যে বিক্রিয়া দুটি সম্পন্ন কর।
২। বিক্রিয়া দুটির ধরণ ব্যাখ্যা কর।
4th Week Chemistry Assignment Solution of Class 9 Download HD Image Computer Type
এখান থেকে দেখে নিন নবম শ্রেণীর চতুর্থ সপ্তাহের কেমিস্ট্রি/রসায়ন অ্যাসাইনমেন্ট প্রশ্নের সমাধান কম্পিউটারের লেখা একদম পরিষ্কার ছবি।