UPSC CDS/OTA
Chemical Equations
General Studies
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Chemical Equations

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Questions
30
Time
30 min
Marks
30
Solutions
All inline
Q1Which of the following statements correctly describes a balanced chemical equation? 1. It has an equal number of atoms of each element on both sides of the equation. 2. It implies conservation of mass during a chemical reaction. 3. It is necessary to predict the amount of reactants and products involved. Select the correct answer:MediumSolve →Q2Which one of the following is an example of an unbalanced chemical equation?MediumSolve →Q3Consider the reaction: CaO(s) + H₂O(l) → Ca(OH)₂(aq). What type of reaction is it?MediumSolve →Q4Which of the following reactions is always accompanied by the release of energy?MediumSolve →Q5Which of the following is NOT an example of an exothermic reaction?MediumSolve →Q6Which statement is true about decomposition reactions? 1. They involve the breakdown of a single compound. 2. They are mostly endothermic in nature. 3. Thermal decomposition requires heat.MediumSolve →Q7Electrolysis of water is an example of:MediumSolve →Q8Which of the following is true for displacement reactions?MediumSolve →Q9Identify the double displacement reaction:MediumSolve →Q10Which of the following best describes a redox reaction?MediumSolve →
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