Which of the following will be formed when dilute hydrochloric acid is added to a beaker having copper oxide ?
A solution with blue - green colour is formed due to the formation of copper (II) chloride.
The correct answer is option 1 I.e. A solution with blue - green colour is formed due to the formation of copper (II) chloride.
When dilute hydrochloric acid (HCl) is added to a beaker containing copper(II) oxide (CuO), the following reaction takes place:
CuO+2HCl→CuCl2+H2O
- Copper(II) chloride (CuCl₂) – a blue-green solution
-
Water (H₂O)
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Important Questions from Metals & Non-metals
Due to improper/indiscriminate disposal of hold and used computers or their parts, which of the following are released into the environment as e-waste?
1. Beryllium
2. Cadmium
3. Chromium
4. Heptachlor
5. Mercury
6. Lead
7. Plutonium
Select the correct answer using the codes given below:
Recently, there has been a concern over the short supply of a group of elements called 'rare earth metals'. Why?
1. China, which is the largest producer of these elements, has imposed some restrictions on their export.
2. Other than China, Australia, Canada and Chile, these elements are not found in any country.
3. Rare earth metals are essential for the manufacture of various kinds of electronic items and there is a growing demand for these elements.
Which of the statements given above is/are correct?
Which of the following metals CANNOT be cut with a knife?
Which of the following statement is incorrect regarding metals?
Which of the following metals are mixed with iron to get stainless steel?
