Chemical Reactions and Equations
Subject matter experts of JagranJosh have developed chapter wise practice questions as per the relevancy of the chapter in the CBSE board exam. This practice set contains 10 questions with detailed explanations on “Chapter: Chemical Reactions and Equations” of Science.
Q1.Which of the statements about the reaction below are incorrect?
i. Lead is getting reduced.
ii. Carbon dioxide is getting oxidized.
iii. Carbon is getting oxidized.
iv. Lead oxide is getting reduced.→
Q2.Which of the following is not a balanced equation?
Q3.Aluminum reacts with copper sulphate to produce
Q4.What happens when dilute HCl is added to iron filings? Tick the correct answer.
Q5.Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed?
i. It is an endothermic reaction
ii. It is an exothermic reaction
iii. The pH of the resulting solution will be more than seven
iv. The pH of the resulting solution will be less than seven
Q6.Which among the following are endothermic processes?
i. Reaction of quick lime with water
ii. Dilution acid with water
iii. Evaporation of water
iv. Sublimation of solid ammonium chloride
Q7.Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involve?
i. Displacement reaction
ii. Precipitation reaction
iii. Combination reaction
iv. Double displacement reaction