CBSE |Class 10th Science| Chapter 1 |Chemical Reactions and EquationsBy KeyIndia Education Free Test Portal / 06/11/2024 0% 2 votes, 5 avg 9 CBSE CLASS 10TH SCIENCE Class 10th Science Chapter 1 Chemical Reaction Online Test NameEmailPhone Number 1 / 20 1. Which of the following reaction can also be termed as a thermal decomposition reaction? A) Decomposition reaction B) Double displacement reaction C) Combination reaction D) Displacement reaction 2 / 20 2. What happens when dilute hydrochloric acid is added to iron filings ? A) Hydrogen gas and iron chloride are produced. B) No reaction takes place. C) Iron salt and water are produced. D) Chlorine gas and iron hydroxide are produced. 3 / 20 3. Which of the statements about the reaction below are incorrect ?2 PbO(s) + C(s) → 2Pb (s) + CO2(g)(a) Lead is getting reduced.(b) Carbon dioxide is getting oxidised.(c) Carbon is getting oxidised.(d) Lead oxide is getting reduced. A) (a), (b) and (c) B) (a) and (c) C) (a) and (b) D) All 4 / 20 4. A student wrote a chemical equation of the reaction between carbon monoxide and hydrogen as,CO2 + 2H2 → CH3OH.How can the reaction be classified? A) The reaction is an example of a decomposition reaction as a compound dissociates into two compounds. B) The reaction is an example of a combination reaction as two compounds react to form a single compound. C) The reaction is an example of a decomposition reaction as two compounds react to form a single compound. D) The reaction is an example of a combination reaction as a compound separates into two compounds. 5 / 20 5. What is a balanced chemical equation ? Why should chemical equations be balanced ? Check 6 / 20 6. Which reaction is an example of a combination reaction and a decomposition reaction? A) Both reactions are examples of a decomposition reaction B) Both reactions are examples of combination reaction C) Reaction P is an example of a combination reaction, while reaction Q is an example of a decomposition reaction D) Reaction P is an example of a decomposition reaction, while reaction Q is an example of a combination reaction 7 / 20 7. Give the ratio in which hydrogen and oxygen are present in water by volume. A) 1:1 B) 1:2 C) 2:1 D) 1:8 8 / 20 8. Which of the following reactions is used in black and white photography? A) Combination Reaction B) Decomposition Reaction C) Oxidation reaction D) Displacement reaction 9 / 20 9. Sodium and chlorine are reacted, and as a result, sodium chloride is formed, which is also called table salt. What option gives the reactants and products of the reaction? A) Reactants – sodium and chlorine; products – sodium chloride B) Reactants – sodium; products – chlorine C) Reactants – tables salt; products – sodium and chlorine D) Reactants – sodium and table salt; products – chlorine 10 / 20 10. A student performs an experiment to form aluminium chloride from aluminium and chlorine. Which of the following option gives the chemical equation of the reaction? A) 2Al + Cl2 → 2AlCl B) 3Al + 3Cl2 → 3AlCl3 C) 2Al + 3Cl2 → 2AlCl3 D) Al + Cl2 → AlCl2 11 / 20 11. Which of the following shows an oxidation reaction? A) Gain of oxygen B) None of the above C) Gain of hydrogen D) Loss of oxygen 12 / 20 12. What happens when lead nitrate reacts with potassium iodide? A) They will not react B) A large amount of hydrogen will be released C) Evolution of gas will occur D) Yellow ppt of lead iodide and potassium nitrate will be produced 13 / 20 13. Fe2O3 + 2Al → Al2O3 + 2FeThe above reaction is an example of a A) double displacement reaction B) decomposition reaction C) combination reaction D) displacement reaction 14 / 20 14. From the following, which one is an example of a chemical reaction? A) Grapes get fermented B) All of the above C) Breakdown of food D) Formation of curd 15 / 20 15. The chemical reaction between potassium chloride and silver nitrate is given by the chemical equation,AgNO3 + KCl → AgCl + KNO3.What can be inferred from the chemical equation? A) Silver nitrate and potassium undergo a combination reaction to form silver chloride and potassium nitrate B) Silver nitrate and potassium undergo a double displacement reaction to form silver chloride and potassium nitrate C) Silver nitrate and potassium undergo a decomposition reaction to form silver chloride and potassium nitrate D) Silver nitrate and potassium undergo a displacement reaction to form silver chloride and potassium nitrate 16 / 20 16. A student adds lead and silver to two different test tubes containing an equal amount of copper sulphate solution. The student observes that the colour of the solution in the test tube with lead changes. What explains the change in the colour of the solution? A) A decomposition reaction takes place as copper dissociates from sulphate in the solution. B) A displacement reaction takes place as lead replaces copper from the solution. C) A double displacement reaction takes place as copper dissociates from sulphate and lead combines with sulphate in the solution. D) A combination reaction takes place as lead combines with sulphate in the solution. 17 / 20 17. A student performs an experiment to form aluminium chloride from aluminium and chlorine. Which of the following option gives the chemical equation of the reaction? A) 2Al + Cl2 → 2AlCl B) 2Al + 3Cl2 → 2AlCl3 C) Al + Cl2 → AlCl2 D) 3Al + 3Cl2 → 3AlCl3 18 / 20 18. The chemical formula of magnesium oxide is ______. A) MgO B) Mg2O C) MgO2 D) Mg(OH)2 19 / 20 19. One of the following processes does not involve a chemical reaction, that is: A) Digestion of food in your stomach B) Ripening of banana C) Burning of candle wax when heated D) Melting of candle wax when heated 20 / 20 20. What happens when dilute hydrochloric acid is added to iron fillings? Tick the correct answer. A) Chlorine gas and Iron hydroxide are produced. B) Iron salt and water are produced. C) No reaction takes place. D) Hydrogen gas and Iron chloride are produced. The Chlorine from Hydrogen chloride is displaced by the Iron fillings to undergo the following reaction.2HCl + Fe → FeCl2 + H2 Your score isThe average score is 21% LinkedIn Facebook 0% Restart quiz Please rate this quiz Send feedback
