Previous Year Pattern — Chemistry Mix

Grade 10 Science — Previous Year Pattern — Chemistry Mix: 25 practice questions with instant scoring and explanations.

1. In the reaction 2H₂O₂ → 2H₂O + O₂, oxygen acts as:
2. The IUPAC name of CH₃-CH(OH)-CH₂-CH₃ is:
3. How many grams of H₂SO₄ (M=98) are needed to prepare 500 mL of 2M solution?
4. Which acid is the strongest?
5. The oxidation state of Mn in KMnO₄ is:
6. In the periodic table, electronegativity increases in the direction:
7. The molarity of a solution containing 0.5 moles in 250 mL of solution is:
8. Which salt undergoes hydrolysis to give acidic solution?
9. When copper is heated with oxygen, the product is:
10. The equivalent weight of H₂SO₄ in the reaction with KOH is: (M=98)
11. Which element shows variable oxidation state?
12. The combustion of 16g of CH₄ produces CO₂. Mass of CO₂ produced is: (C=12, H=1, O=16)
13. Which is the most electronegative element?
14. The pH of 0.1 M HCl solution is:
15. In the reaction Cl₂ + H₂O → HCl + HClO, chlorine exhibits:
16. The IUPAC name of C₆H₆ is:
17. Which property increases down a group in the periodic table?
18. The normality of 2M H₂SO₄ solution is:
19. When Na₂O reacts with water, the product is:
20. The oxidation state of N in N₂ is:
21. Which element is a metalloid?
22. The mass number of an atom is the sum of:
23. When ammonia gas dissolves in water, the solution is:
24. The molecular weight of Ca(OH)₂ is: (Ca=40, O=16, H=1)
25. Which compound is covalent?