Change Direct To Indirect Tense

Chemical Reactions & Equations – मॉक टेस्ट (20 प्रश्न)

1. कौन‑सी प्रतिक्रिया ऊष्माक्षेपी है?

CH₄ + 2O₂ → CO₂ + 2H₂O
CaCO₃ → CaO + CO₂
Photosynthesis
Evaporation

2. CaO + H₂O → Ca(OH)₂ + heat यह किस प्रकार?

Exothermic & Combination
Endothermic
Decomposition
Displacement

3. H₂ + Cl₂ → 2HCl यह किस प्रकार?

Combination
Decomposition
Redox
Double displacement

4. Zn + CuSO₄ → ZnSO₄ + Cu यह?

Single displacement
Double displacement
Combination
Decomposition

5. 2H₂O₂ → 2H₂O + O₂ यह?

Decomposition
Combination
Redox
Neutralisation

6. Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl यह?

Double displacement / Precipitation
Single displacement
Decomposition
Redox

7. Mg रिबन हवा में जलने पर?

Chemical change (oxidation)
Physical change
Nuclear reaction
No change

8. CuO + H₂ → Cu + H₂O यह किस प्रकार?

Redox
Combination
Decomposition
Neutralisation

9. CaCO₃ → CaO + CO₂ यह?

Decomposition
Combination
Redox
Exothermic

10. Fe + O₂ → Fe₂O₃ यह?

Combination (Redox)
Decomposition
Displacement
Neutralisation

11. Photosynthesis किस प्रकार?

Endothermic & Combination
Exothermic
Redox
Decomposition

12. HCl + NaOH → NaCl + H₂O यह?

Neutralisation (Double displacement)
Combination
Redox
Decomposition

13. KNO₃ → KNO₂ + O₂ यह?

Decomposition
Combination
Redox
Neutralisation

14. 2AgNO₃ + Cu → Cu(NO₃)₂ + 2Ag यह?

Displacement (Redox)
Double displacement
Combination
Neutralisation

15. CaO + CO₂ → CaCO₃ यह?

Combination (Exothermic)
Decomposition
Redox
Neutralisation

16. Electrolysis of water यह?

Endothermic decomposition
Exothermic
Combination
Displacement

17. Rusting of iron यह?

Redox & Decomposition
Combustion
Neutralisation
Physical change

18. Baking soda + vinegar प्रतिक्रिया?

Acid‑base neutralisation (CO₂ evolved)
Exothermic
Decomposition
Redox

19. Photosynthesis में O₂ निकलता है यह?

Endothermic decomposition
Exothermic
Redox
Neutralisation

20. 2PbO₂ → 2PbO + O₂ यह?

Decomposition (Redox)
Combination
Exothermic
Neutralisation