Ozone is an allotropic form of oxygen. It acts as a powerful oxidizing agent.
During the oxidation of mercury (Hg) by ozone, the sub oxide `(Hg_2O)` formed dissolves in mercury causing it to lose its meniscus and starts sticking to the sides of glass. What is this phenomenon called?
Ozone is an allotropic form of oxygen. It acts as a powerful oxidizing agent.
During the oxidation of mercury (Hg) by ozone, the sub oxide `(Hg_2O)` formed dissolves in mercury causing it to lose its meniscus and starts sticking to the sides of glass. What is this phenomenon called?
During the oxidation of mercury (Hg) by ozone, the sub oxide `(Hg_2O)` formed dissolves in mercury causing it to lose its meniscus and starts sticking to the sides of glass. What is this phenomenon called?
A
Branching of mercury
B
Tailing of mercury
C
Breaking of meniscus
D
Distorted meniscus
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A : Tailing of Hg caused by ozone is due to formation of HgO . R : In the presence of O_(3) , Hg does not loses its meniscus .
Ozone is triatomic allotropic form of oxygen.It is an unstable , dark blue diamagnetic gas, O_3 is thermodyanamically unstable and decomposes to O_2(O_3toO_2+O) . Due to the ease with which it liberates atoms of nascent oxygen, it acts as a powerful oxidising agent second only to F_2 is oxidising power. A binary compound of oxygen with another element is called oxide.The oxides vary widely in their nature and properties. KOH+O_3 to[X]+O_2+H_2O [X] is :
M is a metal above hydrogen in the activity series and its oxide has the formula M_(2)O . This oxide when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity. In the above context answer the following: Name the product at the anode.
In the activity series of metals-M is a metal above hydrogen in the activity series & its oxide has the formula M_(2)O when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity What kind of combination exists between M & O
A tetravalent element forms monoxide and dioxide with oxygen. When air is passed over heated element (1273 K), producer gas is obtained. Monoxide of the element is a powerful reducing agent and reduces ferric oxide to iron Identify the element and write formulae of its monoxide and dioxide. Write chemical equations for the formation of producer gas and reduction of ferric oxide with the monoxide.
In the activity series of metals-M is a metal above hydrogen in the activity series & its oxide has the formula M_(2)O when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity State the no. of electrons in the outermost shell of M.
For a sponaneous reaction, the free energy change must be negative, Delta G=Delta H-T Delta S, Delta H is the enthalpy change during the reaction. T is the absolute temperature, and Delta S is the change in entropy during the reaction. Consider a reaction such as the formation of an oxide M+O_(2) to MO Dioxygen is used up in the course of this reaction. Gases have a more random structure (less ordered) than liquid or solids. Consequently gases have a higher entropy than liquids and solids. In this reaction S (entropy or randomness) decreases, hence Delta S is negative. Thus, if the temperature is raised then T Delta S becomes more negative,Since, TDelta S is substracted in the equation, then Delta G becomes less negative. Thus, the free energy change increases with the increase in temperature. The free energy changes that occur when one mole of common reactant (in this case dioxygen) is used may be plotted graphically aginst temperature for a number of reactions of metals to their oxides. The following plot is called an Ellingham diagram for metal oxide. Understanding of Ellingham diagram is extremely important for the efficient extraction of metals. Free energy change of Hg and Mg for the convertion to oxides the slpe of Delta G vsT has been changed above the boiling points of the given metal because :
If an element can exist in several oxidation states, it is convernient to display the reduction potentials correspondingg to the various half reactions in diagrammatic form, know as latimer diagram the latimer diagram for chlorine in acid solutio is CIO_(4)^(-)overset(+1.20V)toCiO_(3)^(-)overset(+1.18V)toHClO_(2)overset(+1.60V)toHClOoverset(1.67V)toCl_(2)overset(1.36V)toCl^(-) in basic solution. ClO_(4)^(-)overset(0.37V)toClO_(3)^(-)overset(0.30V)toClO_(2)^(-)overset(0.68V)toClO^(-)overset(0.42V)toCl_(2)overset(1.36V)toCl^(-) The standard potentials for two nonadjacent species can also be calculateed by using the concept that triangleG^(@) as an additive property but potential is not an additive property and triangleG^(@)=-nFx^(0) . if a given oxidation stateis a stronger oxidising agent than the next higher oxidation state, disproportionation can occur. The reverse of disproportionation is called comproportionation. The relative stabilities of the oxidation state can also be understood by drawing a graph of triangleG^(@)//F against oxidation state, known as frost diagram, choosing the stability of zero oxidation state arbitrarily as zero. The most stable oxidation state of a species lies lowest in the diagram, disproportionation is spontaneous if the species lies above a straight line joining its two product species. Q. What is the potential couple (ClO^(-))/(Cl^(-)) at pH=14 ?
Ozone reacts with dry iodine to form an oxide having ____oxygen atoms in its molecules.
M is a metal above hydrogen in the activity series and its oxide has the formula M_(2)O . This oxide when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity. In the above context answer the following: What kind of combination exists between M and O?