NCERTCOURSE.COM- Find here the NCERT/CBSE chapter-wise Multiple Choice Questions from Class 10 Science book Chapter 1 Chemical Reactions and Equations with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Chemical Reactions and Equations. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.
MCQ Questions for Class 10 Science with Answers Chemistry
Q1. MnO2 + 4HCl → 2 + 2H2O + Cl2 Identify the substance oxidized in the above . equation.
(i) MnCl2
(ii) HCl
(iii) H2O
(iv) MnO2
(iv)
Q2. In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature?
(i) 2H2(l) + O2(l) → 2H2O(g)
(ii) 2H2(g) + O2(l) → 2H2O(l)
(iii) 2H2(g) + O2(g) → 2H2O(l)
(iv) 2H2(g) + O2(g) → 2H2O(g)
(iv)
Q3. When Ag is exposed to air it gets a black coating of
(i) AgNO3
(ii) Ag2S
(iii) Ag2O
(iv) Ag2CO3
(ii)
Q4. Which of the following reactions is not correct:
(i) Zn+ CuSO4 → ZnSO4 + Cu
(ii) 2Ag + Cu(NO3)2 → 2AgNO3 + Cu
(iii) Fe+CuSO4 → FeSO4 + Cu
(iv) Mg + 2HCl → MgCl2 + H2
(ii)
Q5. Which of the following is a thermal decomposition reaction?
(i) 2H2O → 2H2 + O2
(ii) 2AgCl → 2Ag + Cl2
(iii) H2(g) + Cl2(g) → 2HCl(g)
(iv) ZnCO3 → ZnO + CO2
(iv)
Q6. When Ag is exposed to air it gets a black coating of
(i) AgNO3
(ii) Ag2S
(iii) Ag2O
(iv) Ag2CO3
(ii)
Q7. Select the oxidising agent for the following reaction: H2S + I2 > 2HI + S
(i) I2
(ii) H2S
(iii) HI
(iv) S
(i)
Q8. Copper displaces which of the following metals from its salt solution:
(i) ZnSO4
(ii) FeSO4
(iii) AgNO3
(iv) NiSO4
(iii)
Q9. Which of the following involves combination of two elements?
(i) N2(g) + 3H2(g) + 2NH3(g)
(ii) Cao(s) + CO2(g) → CaCO3(g)
(iii) 2SO2(g) + O2(g) → 2SO3f(g)
(iv) NH3(g) + HCl(g) – NH4CI(S)
(i)
Q10. The reaction between lead nitrate and potassium iodide present in aqueous solutions is an example of
(i) Decomposition Reaction
(ii) Displacement Reaction
(iii) Double Displacement Reaction
(iv) Neutralisation Reaction
(iii) Double Displacement Reaction
Q11. Give the ratio in which hydrogen and oxygen are present in water by volume.
(i) 1:2
(ii) 1:1
(iii) 2:1
(iv) 1:8
(i) 1:2
Q12. Which of the following is not physical change?
(i) Boiling of water to give water vapour
(ii) Melting of ice to give water
(iii) Dissolution of salt in water
(iv) Combustion of Liquefied Petroleum Gas (LPG)
(iv) Combustion of Liquefied Petroleum Gas (LPG)
Q13. The process of reduction involves
(i) addition of oxygen
(ii) addition of hydrogen
(iii) removal of oxygen
(iv) removal of hydrogen
(ii) addition of hydrogen
Q14. What type of chemical reactions take place when electricity is passed through water?
(i) Displacement
(ii) Combination
(iii) Decomposition
(iv) Double displacement
(iii) Decomposition
Q15. Oxidation is a process which involves
(i) addition of oxygen
(ii) addition of hydrogen
(iii) removal of oxygen
(iv) removal of hydrogen
(i) addition of oxygen
Q16. Color of magnesium oxide is
(i) White
(ii) Blue
(iii) Grey
(iv) Pink
(i) White
Q17. Oxidation is a process which involves
(i) addition of oxygen
(ii) addition of hydrogen
(iii) removal of oxygen
(iv) removal of hydrogen
(i) addition of oxygen
Q18. The process of reduction involves
(i) addition of oxygen
(ii) addition of hydrogen
(iii) removal of oxygen
(iv) removal of hydrogen
(ii) addition of hydrogen
Q19. Which of the following gases can be used for storage
(i) Carbon dioxide or Oxygen
(ii) Nitrogen or Oxygen
(iii) Carbon dioxide or Helium
(iv) Helium or Nitrogen
(iv) Helium or Nitrogen
Q20. Which of the following is true for an unbalanced chemical equation?
(i) Number of atoms is equal on both sides of the equation
(ii) Number of atoms is less on the left side of the equation
(iii) Number of atoms is more on the right side of the equation
(iv) Both (ii) and (iii).
(iv) Both (ii) and (iii).
Q21. Magnesium ribbon is rubbed before burning because it has a coating of
(i) basic magnesium carbonate
(ii) basic magnesium oxide
(iii) basic magnesium sulphide
(iv) basic magnesium chloride
(i) basic magnesium carbonate
Q22. Which of the following is an endothermic process?
(i) Dilution of sulphuric acid
(ii) Sublimation of dry ice
(iii) Condensation of water vapours
(iv) Respiration in human beings
(ii) Sublimation of dry ice
Q23. What type of chemical reactions take place when electricity is passed through water?
(i) Displacement
(ii) Combination
(iii) Decomposition
(iv) Double displacement
(iii) Decomposition
Q24. Dissolving suger is an example of-
(i) Physical change
(ii) Chemical change
(iii) Redox Reaction
(iv) None of these.
(i) Physical change
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