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Chemical Reactions And Equations Mock Tests

29 questions available

Chemical Reactions And Equations Mock Test 1

Questions: 29

नमूना प्रश्न

Class 10 Science
The reaction between hydrogen sulphide gas and chlorine gas is:
A H₂S + Cl₂ → 2HCl + S
B H₂S + Cl₂ → H₂Cl₂ + S
C 2H₂S + 3Cl₂ → 2HCl + 3SO₂
D H₂S + 2Cl₂ → 4HCl + S
Class 10 Science
Which of the following is a decomposition reaction?
A Zn + CuSO₄ → ZnSO₄ + Cu
B 2Na + Cl₂ → 2NaCl
C CaCO₃ → CaO + CO₂
D NaOH + HCl → NaCl + H₂O
Class 10 Science
A chemical equation can be balanced by adjusting the:
A Formulae of the compounds
B Coefficients of the compounds
C Subscripts of the elements
D Positions of the elements
Class 10 Science
Which of the following reactions is an example of a double displacement reaction?
A Mn + CuO → MnO + Cu
B CaO + SiO₂ → CaSiO₃
C Fe + CuSO₄ → FeSO₄ + Cu
D AgNO₃ + NaCl → AgCl + NaNO₃
Class 10 Science
Which of the following processes is endothermic?
A Combustion of methane
B Decomposition of ferrous sulphate crystals
C Reaction of lime water with carbon dioxide
D Reaction of sodium with water
Class 10 Science
Which of the following is a physical change?
A Rusting of iron
B Burning of magnesium
C Dissolving salt in water
D Souring of milk
Class 10 Science
When copper sulphate crystals are heated strongly in a test tube, the blue colour changes to white. On adding a few drops of water to the white residue, the blue colour reappears. The correct explanation is:
A copper sulphate decomposes on heating and reforms on adding water
B copper sulphate loses water of crystallisation on heating and regains it on adding water
C copper sulphate oxidises on heating and reduces on adding water
D copper sulphate undergoes a chemical change that is irreversible
Class 10 Science
Which of the following is a decomposition reaction driven by light energy?
A Decomposition of calcium carbonate
B Decomposition of ferrous sulphate
C Decomposition of silver chloride
D Decomposition of water

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