JEE CHEMISTRY UNIT 1: SOME BASIC CONCEPTS IN CHEMISTRY QUIZ NO 1 TOTAL QUESTIONS = 20 Mock Test Quiz Free MCQ pyqonline.com

JEE CHEMISTRY UNIT 1: SOME BASIC CONCEPTS IN CHEMISTRY
QUIZ NO 1
TOTAL QUESTIONS = 20

1. Which one of the following is an extensive property?

A. Temperature B. Pressure C. Density D. Mass

2. The density of a 3 M solution of NaCl (molar mass = 58.5 g/mol) is 1.2 g/mL. The molality of the solution is

A. 2.5 m B. 4.0 m C. 3.0 m D. 3.5 m

3. Which of the following is a state function?

A. Work B. Enthalpy C. Heat D. Pressure

4. Which of the following has the maximum number of atoms?

A. 1 g of Mg B. 1 g of O₂ C. 1 g of Li D. 1 g of Ag

5. 25.3 g of sodium carbonate (Na₂CO₃) is dissolved in enough water to make 250 mL of solution. The molar concentration of sodium ions (Na⁺) is

A. 0.477 M B. 1.910 M C. 0.955 M D. 0.238 M

6. Which law states that the properties of gases are additive?

A. Dalton's Law B. Charles's Law C. Avogadro's Law D. Boyle's Law

7. How many moles of lead(II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?

A. 0.011 B. 0.022 C. 0.033 D. 0.044

8. Excess of carbon dioxide is passed through 50 mL of 0.5 M calcium hydroxide solution. The volume of CO₂ required is

A. 11.2 L B. 5.6 L C. 22.4 L D. 2.24 L

9. Which gas law states that equal volumes of gases contain an equal number of molecules at the same temperature and pressure?

A. Avogadro's law B. Boyle's law C. Ideal gas law D. Charles's law

10. How much time (in hours) would it take to distribute one Avogadro number of wheat grains if 10²⁰ grains are distributed each second?

A. 167.3 hours B. 16.73 hours C. 1673 hours D. 1.673 hours

11. What is the density of a gas with molar mass 44 g/mol at STP?

A. 22.4 g/L B. 44 g/L C. 1.96 g/L D. 2.00 g/L

12. In the reaction 2H2 + O2 → 2H2O, how many grams of water are formed by the complete reaction of 4 g of hydrogen?

A. 9 g B. 36 g C. 18 g D. 72 g

13. A sample of pure compound contains 9 g of aluminum and 35.5 g of chlorine. The empirical formula of the compound is

A. AlCl₃ B. AlCl₂ C. AlCl D. Al₂Cl₃

14. The SI unit of amount of substance is

A. mole B. liter C. kilogram D. gram

15. Which of the following has the smallest mass?

A. 1 atom of oxygen B. 1 atom of nitrogen C. 1 atom of helium D. 1 atom of carbon

16. The SI unit of molar mass is

A. g B. kg C. g/mol D. kg/mol

17. The molarity of a solution is defined as

A. moles of solute per kg of solvent B. grams of solute per liter of solvent C. grams of solute per liter of solution D. moles of solute per liter of solution

18. Which of the following is an example of a compound?

A. Water B. Iron C. Oxygen D. Helium

19. The empirical formula of glucose is

A. C₆H₁₂O₆ B. C₂H₄O₂ C. CHO D. CH₂O

20. The number of atoms in 0.1 mole of a triatomic gas is

A. 1.204 × 10²³ B. 1.806 × 10²³ C. 6.022 × 10²² D. 3.6 × 10²²

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