NEET Chemistry: Some Basic Concepts Of Chemistry — MCQ Test 6

Q6. A mixture of 2.3 g ethanol (\( \ce{C2H5OH} \)) and 4.8 g methanol (\( \ce{CH3OH} \)) is dissolved in water to make 250 mL of solution. What is the total molarity of alcohols? (Molar masses: ethanol = 46 g/mol, methanol = 32 g/mol)

Q7. How many significant figures are present in the result of \( \frac{0.0732 \times 310.15}{0.0821} \)?

Q8. A mixture of 6 g \( \ce{H2} \) and 32 g \( \ce{O2} \) is ignited to form \( \ce{H2O} \). What is the mass of \( \ce{H2O} \) produced? (Atomic masses: H = 1, O = 16)

Q9. A compound contains 52.17% carbon, 13.04% hydrogen, and 34.78% oxygen by mass. What is its empirical formula? (Atomic masses: C = 12, H = 1, O = 16)

Q10. What is the mass of \( \ce{MgO} \) produced when 12 g of \( \ce{Mg} \) reacts with 16 g of \( \ce{O2} \)? (Atomic masses: Mg = 24, O = 16)

NEET Chemistry — Some Basic Concepts Of Chemistry

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How many significant figures are present in the result of \( \frac{0.0567 \times 298.15}{0.101} \)?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Chemistry preparation, focusing specifically on the chapter Some Basic Concepts Of Chemistry. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Significant, Compound, Contains, Hydrogen, Empirical, and Produced.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. How many significant figures are present in the result of \( \frac{0.0567 \times 298.15}{0.101} \)?

  • A. 2
  • B. 4
  • C. 3
  • D. 5

Q2. A compound contains 38.71% carbon, 9.68% hydrogen, and 51.61% oxygen by mass. What is its empirical formula? (Atomic masses: C = 12, H = 1, O = 16)

  • A. \( \ce{CH2O} \)
  • B. \( \ce{CH3O} \)
  • C. \( \ce{C2H6O} \)
  • D. \( \ce{CH4O} \)

Q3. What is the mass of \( \ce{BaCl2} \) produced when 26.1 g of \( \ce{Ba(OH)2} \) reacts with excess \( \ce{HCl} \)? (Molar masses: \( \ce{Ba(OH)2} \) = 171 g/mol, \( \ce{BaCl2} \) = 208 g/mol)

  • A. 15.87 g
  • B. 47.61 g
  • C. 20.8 g
  • D. 31.74 g

Q4. A 0.2 M \( \ce{NaCl} \) solution is diluted by adding 250 mL of water to 150 mL of the original solution. What is the final molarity?

  • A. 0.1 M
  • B. 0.05 M
  • C. 0.15 M
  • D. 0.075 M

Q5. A 0.4 M \( \ce{HCl} \) solution is diluted by adding 200 mL of water to 100 mL of the original solution. What is the final molarity?

  • A. 0.2 M
  • B. 0.1 M
  • C. 0.15 M
  • D. 0.133 M

+ 5 more questions in the actual test

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