Rayat Result 5th Scholarship Navodaya Entrance 6th Science My Vocabulary 7th Science 10th Geography

Chemical Reactions and Equations MCQ Practice set

 Chemical Reactions and Equations

Q1. Which of the following is a physical change?

Q2. Which of the following is a chemical change?

Q3. What is the condensed form of a chemical reaction using chemical formulae called?

Q4. In a chemical equation, the reactants are written on the _______.

Q5. How are the reactants and products linked in a chemical equation when there are two or more?

Q6. In balancing the equation NaOH + H2SO4 → Na2SO4 + H2O, which element is selected first for balancing?

Q7. Which law of chemistry is followed when the total mass of each element in the reactants is equal to the total mass of each element in the products?

Q8. A balanced equation has the same number of atoms for each element in the _______.

Q9. Which type of chemical reaction involves the combination of two or more reactants to form a single product?

Q10. How many reactants are involved in a decomposition reaction?

Q11. Which reaction involves the breakdown of a single reactant into two or more products?

Q12.In the reaction between copper sulfate (CuSO4) and iron (Fe), what are the products formed?
CuSO4(aq) + Fe(s) → ?

Q13.What is the color of the precipitate formed when potassium chromate (K2CrO4) is added to a solution of barium sulphate (BaSO4)?

Q14. Which of the following is an exothermic process?

Q15. The rate of a chemical reaction increases when the size of the particles of the reactants:

Q16. What is a catalyst in a chemical reaction?

Q17. Which of the following statements about oxidation reactions is correct?

Q18. In the reaction 2KMnO4 + 10FeSO4 + 8H2SO4 -> K2SO4 + 2MnSO4 + 5Fe2(SO4)3 + 8H2O, which compound is oxidized?

Q19. The net ionic reaction for the oxidation of ferrous ion (Fe2+) to ferric ion (Fe3+) is represented as:

Q20. Which of the following is a correct definition of oxidation?

Q21. When the positive charge on an atom or an ion increases or the negative charge on them decreases, it is called:

Q22. Which enzyme is involved in the transport of electrons during cellular respiration?

Q23. Which of the following reactions represents the formation of rust?

Q24. Corrosion is a process that primarily affects:

Q25. Rancidity in cooking oil or ghee is prevented by:

Your Score:

Post a Comment