Chemical Reaction || Solved Q/A for S.E.E. - Exam || Part-1

By Pravin Keshari -

CHEMICAL REACTION

Part-1 

Very short questions and answers for S.E.E. students


Chemical reaction

Questions and answers to practice for S.E.E. examination

1) What is word equation?
Answer: The chemical reaction expressed by writing full names of reactants and product is called a word equation. 


2) What are products?
Answer: The elements or compounds that are produced during a chemical reaction are called products. Products are written on the right hand side of the arrow.


3) Write any two factors that affect the chemical reaction.
Answer: Any two factors that affect the chemical reaction are:
    (i) Temperature and    
    (ii) Pressure


4) What is meant by precipitate?
Answer: A precipitate is an insoluble solid that emerges from a liquid solution during a chemical change.


5) What is acid-base reaction? Give one example.
Answer: The chemical reaction in which an acid reacts with a base to form salt and water is called acid-base reaction. For example:
    Acid + Base → Salt + Water
    HCl + KOH → KCl + H₂O


6) Define promotor.
Answer: The chemical substance which is used to activate a positive catalyst is called promoter. Example: Molybdenum (Mo).


7) What is a balanced chemical equation?
Answer: The chemical equation written by balancing the number of atoms of elements on both sides of arrow in reactants and products is called a balanced chemical equation.


8) What is a catalyst?
Answer: A catalyst is a chemical substance which increases or decreases the rate of chemical reaction by remaining itself chemically changed.


9) What is Neutralization reaction?
Answer: The chemical reaction in which an acid reacts with a base to form neutral substances, i.e. salt and water is called neutralization reaction.


10) Define positive catalyst with an example.
Answer: The catalyst which increases the rate of chemical reaction is called positive catalyst. For example: Manganese dioxide (MnO₂).

Chemical Reaction

11) What is reversible reaction?
Answer: Reversible reaction is the chemical reaction in which the products can recombine to give back the reactants.


12) Write any two methods to increase the rat of chemical reaction.
Answer: The two methods to increase the rate of chemical reaction are:
    (i) By increasing the concentration of the reactants.
    (ii) BY using a positive catalyst.


13) What is chemical reaction?
Answer: The exchange, synthesis or dissociation that occurs in the molecules during a chemical change is called chemical reaction.


14) What is endothermic reaction?
Answer: The chemical reaction in which heat is absorbed during the reaction is called exothermic reaction.


15) What is exothermic reaction?
Answer: The chemical reaction in which heat is released during the reaction is called exothermic reaction.

___________________________________________________________________________________

Chemical Reaction || Solved Q/A for S.E.E. - Exam || Part-2

Click here for Chemical Reaction-Practice Sheet

Click here for Long form of Periodic Table

       More questions will be given in another blog post.

    ____________________________________________________________________________________

For any kind of query in any chapter of S.E.E. science, mail your question/s on 

pravin.keshari.31@gmail.com

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Location: Siddharthanagar, Nepal

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