BPSC CCE Prelims
Organic Chemistry Basics Previous Year Questions (PYQs)
Practice solved questions for Organic Chemistry Basics with detailed step-by-step solutions, key insights, and trend analysis for BPSC CCE PRELIMS.
Solved Previous Year Questions
Filter & practice questions topic-wise
The odour of acetic acid resembles that of
Detailed Explanation:
Acetic acid is the main component of vinegar, giving it its characteristic pungent, sour smell.
Vinegar typically contains 4-8% acetic acid by volume, which is why the odour of pure acetic acid closely resembles that of vinegar.
Which among the following is known as quicklime?
Detailed Explanation:
Quicklime is the common name for calcium oxide (CaO), produced by heating limestone (CaCO₃) to drive off carbon dioxide.
Ca(OH)₂ is slaked lime (formed when quicklime reacts with water), CaCl₂ is calcium chloride, and CaCO₂ is not a valid chemical formula.
Therefore, CaO is quicklime, making Option 4 the correct answer.
Which among the following would cause the bright red colour due to bursting of crackers?
Detailed Explanation:
Strontium compounds (like strontium carbonate) emit a bright red colour when heated in fireworks. The heat excites electrons in strontium atoms, which release energy as red light when returning to ground state.
Sodium produces yellow, sulphur burns but doesn't produce metal flame colours, and magnesium gives white light.
Therefore, strontium is responsible for bright red colour in crackers, making Option 4 the correct answer.
🧐 Not Sure What to Study Next?
Get a personalised study plan based on your goals, time and revision needs.
Related Topics in General Science
Frequently Asked Questions
Common questions about Organic Chemistry Basics in BPSC CCE PRELIMS