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Past Year Paper, Chemistry (Set - 5), 2016, Class 11, Chemistry

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FAQs on Past Year Paper, Chemistry (Set - 5), 2016, Class 11, Chemistry

1. What are some common types of chemical reactions?
Ans. Some common types of chemical reactions include combustion reactions, precipitation reactions, acid-base reactions, and redox reactions.
2. How can you identify if a chemical reaction is a redox reaction?
Ans. A redox reaction involves the transfer of electrons between reactants. To identify if a chemical reaction is a redox reaction, you can check if there is a change in the oxidation state of any element in the reaction. If there is a change in oxidation state, it indicates a redox reaction.
3. What is the difference between an exothermic and endothermic reaction?
Ans. In an exothermic reaction, heat is released to the surroundings, resulting in an increase in temperature. On the other hand, in an endothermic reaction, heat is absorbed from the surroundings, resulting in a decrease in temperature.
4. How can you balance a chemical equation?
Ans. To balance a chemical equation, you need to ensure that the number of atoms of each element is the same on both sides of the equation. You can achieve this by adjusting the coefficients in front of the reactants and products. Start by balancing the elements that appear in the fewest compounds and then proceed to balance the rest.
5. What is stoichiometry and how is it used in chemistry?
Ans. Stoichiometry is the calculation of the quantities of reactants and products involved in a chemical reaction. It is used to determine the amount of reactants needed to produce a certain amount of product or to calculate the amount of product obtained from a given amount of reactant. Stoichiometry is based on the principle of the conservation of mass.
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