1. What is a chemical equation? Explain how it can be represented.
2. Explain the evolution of a gas in chemical reactions with the help of examples.
3. Some chemical reactions are characterized by a change in colour. Explain with the help of examples.
4. Some reactions are characterized by the formation of precipitate. Explain with the
help of examples.
5. What are photochemical reactions ? explain with the help of diagram.
6. Write a short note on enzymes as catalysts.
please answer of I will report ur answer
Answers
Answer:
I
1. What is a chemical equation? Explain how it can be represented.
Ans:A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side. ... The first chemical equation was diagrammed by Jean Beguin in 1615.
2. Explain the evolution of a gas in chemical reactions with the help of examples.
Ans:Evolution of gas chemical reaction example
Here, hydrochloric acid oxidizes zinc to produce an aqueous metal salt and hydrogen gas bubbles. ... In the above redox reaction, neutral zinc is oxidized to Zn2+, and the acid, H+, is reduced to H2(g). The oxidation of metals by strong acids is another common example of a gas evolution reaction.
3. Some chemical reactions are characterized by a change in colour. Explain with the help of examples.
Ans:Characteristics of Chemical reaction
1)Evolution of gas. Some chemical reactions are characterised by the evolution of gas. ...
2)Formation of precipitate. Some chemical reactions are characterised by the formation of precipitate. ...
3)Change in colour. Some chemical reactions are characterised by change in colour. ...
Change in temperature. ...
..When copper reacts with the elements (oxygen, water and carbon dioxide), it turns from its element color of reddish-brown to green. This chemical reaction is hydrated copper carbonate, and a famous example of it is the Statue of Liberty.
4. Some reactions are characterized by the formation of precipitate. Explain with the
Ans:Precipitation refers to a chemical reaction that occurs in aqueous solution when two ions bond together to form an insoluble salt, which is known as the precipitate.
Precipitation Example
Mixing silver nitrate and sodium chloride in water will cause silver chloride to precipitate out of solution as a solid. In this example, the precipitate is silver chloride.
5. What are photochemical reactions ? explain with the help of diagram.
Ans: A Photochemical reaction is a reaction which takes place when a chemical process absorbs light energy as its energy source. The example is photosynthesis. ... The photons from the light energy split water and enable ATP production that drives the entire process.
6. Write a short note on enzymes as catalysts.
Ans:An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. ... Without enzymes, many of these reactions would not take place at a perceptible rate. Enzymes catalyze all aspects of cell metabolism.
Explanation:
I hope it will be helpful for you...
Mark my answers brilliant thanks...
