CBSE NEET Chemistry Practice MCQs 3 ( Chapter- Basic Concepts of Chemistry) of 11th Class

These are MCQs 3 of Chapter 1 (Basic Concepts of Chemistry) for 11th Class. Practic MCQs to check your knowledge for Entracne examination like CBSE NEET etc

1. The number of significant figures in 0.5000 are

• One
• Three
• Two
• Four

2. The percentage of oxygen in NaOH is

• 40
• 60
• 8
• 10

3. 12g of Mg (at. mass 24) will react completely with acid to give

• One mol of H₂
• 1/2 mol of H₂
• 2/3 mol of O₂
• both 1/2 mol of H₂ and 1/2 mol of O₂

4. Vapour density o fa gas is 22. What is its molecular mass ?

• 33
• 22
• 44
• 11

5. The number of moles of sodium oxide in 620 g of it is

• 1 mol
• 10 moles
• 18 moles
• 100 moles

6. which of the following directly explains the law of conservation of mass ?

• Dalton's law
• Avogadro's law
• Beizlius law
• Hund's rule

7. A mixture of sand and iodine can be separated by

• Crystallisation
• Sublimation
• distillation
• Fractionation

8. Balancing of chemical equations is based upon

• Law of combining volumes
• Law of multiple proportions
• Law of conservation of mass
• Law of definite proportions

9. A balanced chemical equation should follow all axcept

• Law of conservation of atoms
• Conservation of electrons
• Gay Lussac's law
• Law of conservation of mass

10. The correct relationship between mol. mass (M) and vapour density (V.D.) is

• VD = 2M
• VD = M²
• VD = M/2
• M = (VD) ^1/2

CBSE NEET Chemistry Practice MCQs =>

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