Download App

Acids, Bases and Salts — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts3 Marks
Question
On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green.
  1. Predict the new compound formed which imparts a blue-green colour to solution.
  2. Write a balanced chemical equation of the reaction which takes place.
  3. On the basis of the above reaction, what can you say about the nature of copper oxide?
✓

Answer

  1. Copper (II) chloride CuCl2
  2. CuO(s) + 2HCl(aq) → CuCl2(aq) + H2O(l)
  3. Copper oxide is basic in nature

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the questions.[Che-3M]" from Acids, Bases and Salts→Acids, Bases and Salts — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

Write the name and the structural formula of the compound formed when ethanol is heated at 443 K with excess of conc. $\text{H}_{2}\text{SO}_{4}$ State the role of conc. $\text{H}_{2}\text{SO}_{4}$ in this reaction. Write chemical equation for the reaction.
→
Name the compound formed when ethanol is heated in excess of conc. sulphuric acid at 443 K. Also write the chemical equation of the reaction stating the role of conc. sulphuric acid in it. What would happen if hydrogen is added to the product of this reaction in the presence of catalysts such as palladium or nickel?
→
  1. Give the names and formulae of one metal chloride and one non-metal chloride.
  2. State an important property in which these metal chloride and non-metal chloride differ.
  3. Why do they differ in this property?
→
Name the reaction which is usually used in the conversion of vegetable oils to fats. Explain the reaction involved in detail. Write a chemical equation to illustrate your answer.
→
Identify the acid and the base from which sodium chloride is obtained. Which type of salt is it? When is it called rock salt? How is rock salt formed?
→
State the meaning of the functional group in an organic compound. Write the formula of the functional group present in alcohols, aldehydes, ketones and carboxylic acids.
→
An organic acid X is a liquid, which often freezes during winter time in cold countries, having the molecular formula C2H4O2. On warming it with methanol in the presence of a few drops of concentrated sulphuric acid, a compound Y with a sweet smell is formed.
  1. Identify X and Y. Also write their formulae showing the functional group present in them.
  2. Write a chemical equation for the reaction involved.
→
What is a homologous series? Find the difference in molecular mass between the two consecutive members of a homologous series. State how in a homologous series of carbon compounds the following properties vary with increase in molecular mass:
a. Melting and boiling points
b. Chemical properties
→
What are homologous series of carbon compounds? Write the molecular formula of two consecutive members of homologous series of aldehydes. State which part of these compounds determines their (i) physical and (ii) chemical properties.
→
What is a thermite reaction? Explain with the help of an equation. State one use of this reaction.
→