Download App

Metals and Non-Metals — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals1 Mark
Question
If copper is kept exposed to damp air for a considerable time, it gets a green coating on its surface. This is due to the formation of:
  1. Hydrated copper sulphate.
  2. Copper oxide.
  3. Basic copper carbonate.
  4. Copper nitrate.
✓

Answer

  1. Basic copper carbonate.

Explanation:

Copper reacts slowly with water and carbon dioxide in the atmosphere to form copper carbonate. This gives a green colour coating to its surface.

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 "M.C.Q-[Che-1M]" from Metals and Non-Metals→Metals and Non-Metals — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

The salt which will give a neutral solution on dissolving in water will be:
  1. CH3COONa
  2. NH4Cl
  3. KCl
  4. Na2CO3
→
The three imaginary elements X, Y and Z represent a Dobernener's triad. If the atomic mass of element X is 14 and that of element Y is 46, then the atomic mass of element Z will be:
  1. 28.
  2. 60.
  3. 78.
  4. 72.
→
Which of the following statements is correct about an aqueous solution of an acid and of a base?
  1. Higher the pH, stronger the acid.
  2. Higher the pH, weaker the acid.
  3. Lower the pH, stronger the base.
  4. Lower the pH, weaker the base.
  1. 1 and 3
  2. 2 and 3
  3. 1 and 4
  4. 2 and 4
→
How many Mn atoms are found in the following compound?
2MnO4
→
One of the following does not happen during a chemical reaction. This is:
→
Which among the following alloys contain mercury as one of its constituents?
→
Bee stings can be treated with:
  1. Vinegar.
  2. Sodium hydrogencarbonate.
  3. Potassium hydroxide.
  4. Lemon juice.
→
On adding dilute sulphuric acid to a test tube containing a metal ' $X$ ', a colourless gas is produced when a burning match stick is brought near it. Which of the following correctly represents metal ' $X$ '?
→
The hydrocarbon 2-methylbutane is an isomer of:
  1. n-pentane.
  2. n-butane.
  3. Propane.
  4. Iso-butane.
→
Which of the following gases can be used for storage of fresh sample of an oil for a long time?
→