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FAQs on Past Year Paper, Chemistry (Set - 1), Outside Delhi, 2014, Class 12, Chemistry - Additional Study Material for Class 12

1. What are some common types of chemical reactions studied in Class 12 Chemistry?
Ans. Some common types of chemical reactions studied in Class 12 Chemistry include combination reactions, decomposition reactions, displacement reactions, redox reactions, and acid-base reactions.
2. What is the difference between an exothermic and endothermic reaction?
Ans. In an exothermic reaction, heat is released to the surroundings, resulting in a rise in temperature. On the other hand, in an endothermic reaction, heat is absorbed from the surroundings, causing a decrease in temperature.
3. How is the rate of a chemical reaction determined?
Ans. The rate of a chemical reaction is determined by factors such as concentration of reactants, temperature, surface area, presence of a catalyst, and nature of reactants. Increasing the concentration of reactants, raising the temperature, and using a catalyst can increase the rate of a reaction.
4. What is stoichiometry and why is it important in chemistry?
Ans. Stoichiometry is the study of the quantitative relationships between reactants and products in a chemical reaction. It helps in determining the amount of reactants needed, predicting the amount of products formed, and understanding the balanced equation for a reaction.
5. What is the concept of equilibrium in a chemical reaction?
Ans. Equilibrium in a chemical reaction refers to a state where the rate of the forward reaction is equal to the rate of the reverse reaction. It is characterized by the presence of both reactants and products in constant concentrations. The concept of equilibrium is important in understanding reversible reactions and the conditions required to attain a state of dynamic balance.
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