CBSE Class 10 Science 2019 · Paper 31/5/2 · Question 5(b)
List the changes that are observed when dil. is added to a small amount of copper oxide in a beaker. Write balanced chemical equation for the reaction.
Answer
Black copper oxide dissolves and the solution turns blue-green as copper(II) chloride forms, with no gas given off.
Changes observed: the black copper oxide dissolves on stirring, and the colourless solution becomes blue-green, because copper(II) chloride is formed. No gas is given off.
Balanced equation:
🔒 Step-by-step solution
Sign up free to see every step of how it is worked out.
From the board paper
More questions from Acids, Bases and Salts
Class 10 Science — every question with an expert-verified, step-by-step solution.
- Q1 A solution turns red litmus blue, its pH is likely to be
- Q1 You have been provided with three test tubes. One of them contains…
- Q2 A solution reacts with crushed egg-shells to give a gas that tu…
- Q3 10 mL of a solution of NaOH is found to be completely neutralised b…
- Q4 Which one of the following types of medicines is used for trea…
- Q5 Write word equations and then balanced equations for the reaction t…
- Q6 Compounds such as alcohols and glucose also contain hydrogen bu…
- Q7 Why does distilled water not conduct electricity, whereas rain wat…
- Q8 Why does dry HCL gas not show acidic behaviour in the absence of…
- Q9 Five solutions A, B, C, D and E when tested with universal indicato…
- Q10 Equal lengths of magnesium ribbons are taken in test tubes A and B.…
- Q11 Fresh milk has a pH of 6. How do you think the pH will change as i…
All 352 questions on Acids, Bases and Salts → Browse all Science chapters →