Home
Class 12
CHEMISTRY
When copper is exposed to atmosphere for...

When copper is exposed to atmosphere for a longer time, a green mass deposits on its surface. Discuss the chemical reaction involved.

Text Solution

AI Generated Solution

To understand the formation of the green mass on copper when it is exposed to the atmosphere for a long time, we can break down the process into several steps: ### Step 1: Oxidation of Copper When copper is exposed to moist air, it undergoes oxidation. The reaction involves copper (Cu) reacting with oxygen (O₂) present in the air. **Chemical Reaction:** \[ 2 \text{Cu} + \text{O}_2 \rightarrow 2 \text{CuO} \] This reaction forms copper(II) oxide (CuO), which is a black solid. ...
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • D AND F BLOCK ELEMENTS

    CENGAGE CHEMISTRY ENGLISH|Exercise Ex 6.2 Subjective (Compound Of Zn:)|1 Videos

  • D AND F BLOCK ELEMENTS

    CENGAGE CHEMISTRY ENGLISH|Exercise Ex 6.2 Subjective (Compound Of Ag:)|2 Videos

  • D AND F BLOCK ELEMENTS

    CENGAGE CHEMISTRY ENGLISH|Exercise Ex 6.2 Subjective (Compound Of Fe :)|7 Videos

  • COORDINATION COMPOUNDS

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives Subjective|18 Videos

  • ELECTROCHEMISTRY

    CENGAGE CHEMISTRY ENGLISH|Exercise Archieves Subjective|35 Videos

Similar Questions

Explore conceptually related problems

When copper is placed in the atmosphere for sufficient time, a green crust is formed on its surface. The composition of the green crust is:

What is observed when a solution of sodium sulphate is added to a solution of barium chloride taken in a test tube? Write equation for the chemical reaction involved and name the type of reaction in this case.

A solution of potassium chloride when mixed with silver nitrate solution, an insoluble white substance is formed. Write the chemical reaction involved and also mention the type of the chemical reaction.

What is the product obtained when glycine hydrochloride reacts with two equivalents of NaOH ? Write the chemical reactions involved.

Give suitable chemical terms for the following: Certain water soluble substances, when exposed to the atmosphere at ordinary temperatures, absorb moisture from the atmospheric air becomes moist and dissolve in the absorbed water.

Only the surface atoms in an adsorbent play an active role in adsorption. These atoms possess some residual force such as van der Waals forces and chemical forces. In the process of adsorption. Weak adsorbate is substituting by strong adsorbete. Activated charcoal used in the gas mask is already exposed to the atmospheric air, so gases and water vapours in air are adsorbed on its surface. When the mask is exposed to chlorine atmosphere, the gases are displaced by chlorine. In general, easily liquefiable gases such as CO_(2),NH_(3),Cl_(2), and SO_(2) are adsorbed to a greater extent than the elemental gases, e.g., H_(2),N_(2),O_(2), He, etc. Gas mask works on the principle of

Only the surface atoms in an adsorbent play an active role in adsorption. These atoms possess some residual force such as van der Waals forces and chemical forces. In the process of adsorption. Weak adsorbate is substituting by strong adsorbete. Activated charcoal used in the gas mask is already exposed to the atmospheric air, so gases and water vapours in air are adsorbed on its surface. When the mask is exposed to chlorine atmosphere, the gases are displaced by chlorine. In general, easily liquefiable gases such as CO_(2),NH_(3),Cl_(2), and SO_(2) are adsorbed to a greater extent than the elemental gases, e.g., H_(2),N_(2),O_(2), He, etc. In physical adsorption, the forces associated are

Only the surface atoms in an adsorbent play an active role in adsorption. These atoms possess some residual force such as van der Waals forces and chemical forces. In the process of adsorption. Weak adsorbate is substituting by strong adsorbete. Activated charcoal used in the gas mask is already exposed to the atmospheric air, so gases and water vapours in air are adsorbed on its surface. When the mask is exposed to chlorine atmosphere, the gases are displaced by chlorine. In general, easily liquefiable gases such as CO_(2),NH_(3),Cl_(2), and SO_(2) are adsorbed to a greater extent than the elemental gases, e.g., H_(2),N_(2),O_(2), He, etc. Which of the following gases will substitute O_(2) from adsorbed charcoal?

Give reason for the following: (i). Silver ornament gets tarnished when exposed to atmosphere for a long time. (ii) Silver nitrate solution is kept in dark coloured bottles. (iii). Why does AgNO_3 produce a black stain on the skin.

When CI_(2) gas bubbled through aqueous KOH, a firework explosive (A) is formed along with KCI and H_(2)O . Write down the balanced along chemical reaction involved.

Home
Profile