Q. What is the molarity of a solution prepared by dissolving 5 grams of NaCl in enough water to make 250 mL of solution? (Molar mass of NaCl = 58.5 g/mol) (2023)
A.
0.34 M
B.
0.42 M
C.
0.25 M
D.
0.50 M
Solution
Molarity (M) = moles of solute / liters of solution. Moles of NaCl = 5 g / 58.5 g/mol = 0.0855 moles. Volume of solution = 250 mL = 0.250 L. M = 0.0855 moles / 0.250 L = 0.342 M, approximately 0.34 M.
Understanding "Solutions" is crucial for students aiming to excel in their exams. Practicing MCQs and objective questions not only enhances your grasp of the subject but also boosts your confidence during exam preparation. By focusing on important questions and practice questions, you can significantly improve your performance in both school and competitive exams.
What You Will Practise Here
Concept of solubility and factors affecting it
Types of solutions: saturated, unsaturated, and supersaturated
Concentration calculations: molarity, molality, and percentage
Colligative properties of solutions
Important definitions and formulas related to solutions
Diagrams illustrating solution concepts
Real-life applications of solutions in various fields
Exam Relevance
The topic of "Solutions" is frequently tested in CBSE, State Boards, NEET, and JEE exams. Students can expect questions that assess their understanding of solution properties, calculations of concentration, and applications of colligative properties. Common question patterns include multiple-choice questions that require conceptual clarity and problem-solving skills.
Common Mistakes Students Make
Confusing different types of solutions and their characteristics
Miscalculating concentrations due to incorrect formula application
Overlooking the significance of temperature in solubility
Neglecting to interpret graphs and diagrams correctly
Failing to relate theoretical concepts to practical scenarios
FAQs
Question: What are the key types of solutions I should know for exams? Answer: You should be familiar with saturated, unsaturated, and supersaturated solutions, as well as their definitions and characteristics.
Question: How can I improve my understanding of solution concentrations? Answer: Practice calculating molarity, molality, and percentage concentration through various practice questions to strengthen your grasp.
Now is the time to take charge of your exam preparation! Dive into our practice MCQs on Solutions and test your understanding. The more you practice, the better you will score. Start solving today!
Soulshift Feedback×
On a scale of 0–10, how likely are you to recommend
The Soulshift Academy?
