Chemistry - MOST IMPORTANT Bihar Police Constable Previous Year Questions
Practice real questions from previous year exams of Bihar Police Constable.
📘 Chemical Reactions📚 Combination Reaction
Q1
When metals react with air, what will be the name of the product formed?
🎯 Bihar Police Constable Exam-2025 (Exam 03.08.2025)
📘 Phase Changing Processes and Their Factors📚 Sublimation
Q2
Which of the following, when in solid form, is also known as dry ice?
🎯 Bihar Police Constable Exam-2025 (Exam 03.08.2025)
📘 Phase Changing Processes and Their Factors📚 Sublimation
Q3
In which of the following phenomena does the solid state change directly into the gaseous state without changing into the liquid state?
🎯 Bihar Police Constable Exam-2025 (Exam 03.08.2025)
📘 Chemical Reactions📚 Exothermic Reaction
Q4
Which of the following reactions is not an exothermic reaction?
🎯 Bihar Police Constable Exam-2025 (Exam 03.08.2025)
📘 Organic Chemistry📚 Aldehyde, Ketone and Carboxylic Acid
Q5
During sudden physical activity, the accumulation of which substance in our muscles causes cramps?
🎯 Bihar Police Constable Exam-2025 (Exam 03.08.2025)
📘 Important Chemical Compounds📚 Bleaching Powder
Q6
In chemical industries, how is bleaching powder used?
🎯 Bihar Police Constable Exam-2025 (Exam 03.08.2025)
📘 Corrosion📚 Rancidity
Q7
What happens when food items containing fats and oils are kept out for a long time?
🎯 Bihar Police Constable Exam-2025 (Exam 03.08.2025)
📘 Oxidation and Reduction📚 Oxidation
Q8
Which of the following is not an example of an oxidation reaction?
🎯 Bihar Police Constable Exam-2025 (Exam 03.08.2025)
📘 Mole Concept📚 Molecular Mass
Q9
What is the molecular weight of heavy water?
🎯 Bihar Police Constable Exam-2025 (Exam 23.07.2025)
📘 Acids, Bases and Salts📚 Neutralization Reaction
Q10
In a neutralization reaction, a new substance is formed, which is called ______.
🎯 Bihar Police Constable Exam-2025 (Exam 23.07.2025)
📘 Important Chemical Compounds📚 Baking Soda
Q11
The common name of Sodium Bicarbonate is ______.
🎯 Bihar Police Constable Exam-2025 (Exam 23.07.2025)
📘 Acids, Bases and Salts📚 Neutralization Reaction
Q12
What do farmers add to neutralize the effect of acidity on the soil?
🎯 Bihar Police Constable Exam-2025 (Exam 23.07.2025)
📘 Acids, Bases and Salts📚 Name of Acid present in compounds
Q13
Which of the following chemicals is known as Vitamin C?
🎯 Bihar Police Constable Exam-2025 (Exam 23.07.2025)
📘 Environmental Chemistry📚 Greenhouse Effect
Q14
Which gas contributes the most to the greenhouse effect?
🎯 Bihar Police Constable Exam-2025 (Exam 23.07.2025)
📘 Separation of Mixtures📚 Centrifugation
Q15
How is butter separated from milk?
🎯 Bihar Police Constable Exam-2025 (Exam 23.07.2025)
📘 Organic Chemistry📚 Hydrocarbons
Q16
Carbon-containing compounds with carbon-carbon double bonds are known as ______.
🎯 Bihar Police Constable Exam-2025 (Exam 23.07.2025)
📘 Electrochemistry📚 Electrolysis
Q17
Which of the following is a chemical effect of electric current?
🎯 Bihar Police Constable Exam-2025 (Exam 23.07.2025)
📘 Chemical Reactions📚 Single Displacement Reaction
Q18
Which of the following metals does not react with dilute hydrochloric acid?
🎯 Bihar Police Constable Exam-2025 (Exam 23.07.2025)
📘 Acids, Bases and Salts📚 pH Scale
Q19
What is the pH value of water?
🎯 Bihar Police Constable Exam-2025 (Exam 20.07.2025)
📘 Radioactivity📚 Applications of Radioactivity
Q20
What is 'Kalpakkam' in Tamil Nadu famous for?
🎯 Bihar Police Constable Exam-2025 (Exam 20.07.2025)