Identify the product A in the following reaction.

Given below are two statements : Statement I : Piciric acid is 2,4,6 - trinitrotoluene. Statement II : Phenol - 2,4 - disulphonic acid is treated with Conc. $${\mathrm{HNO}}_3$$ to get picric acid. In the light of the above statements, choose the most appropriate answer from the options given below :

Which of the following statements is not correct about rusting of iron?

Identify the factor from the following that does not affect electrolytic conductance of a solution.

Alkaline oxidative fusion of $${\mathrm{MnO}}_2$$ gives "A" which on electrolytic oxidation in alkaline solution produces B. A and B respectively are

Reduction potential of ions are given below: $$\begin{array}{ccc}{\mathrm{ClO}}_4^{-}& {\mathrm{IO}}_4^{-}& {\mathrm{BrO}}_4^{-}\\ {\mathrm{E}}^{\circ }=1.19\mathrm{V}& {\mathrm{E}}^{\circ }=1.65\mathrm{V}& {\mathrm{E}}^{\circ }=1.74\mathrm{V}\end{array}$$ The correct order of their oxidising power is :

Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top} .tg .tg-7btt{border-color:inherit;font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top} LIST I (Cell) LIST II (Use/Property/Reaction) A. Leclanche cell I. Converts energy of combustion into electrical energy B. Ni - Cd cell II. Does not involve any ion in solution and is used in hearing aids C. Fuel cell III. Rechargeable D. Mercury cell IV. Reaction at anode $$\mathrm{Zn}\to {\mathrm{Zn}}^{2+}+2{\mathrm{e}}^{-}$$ Choose the correct answer from the options given below :

Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usual meaning :

The molar conductivity for electrolytes $$A$$ and $$B$$ are plotted against $$C^{3/2}$$ as shown below. Electrolytes $$A$$ and $$B$$ respectively are:

One of the commonly used electrode is calomel electrode. Under which of the following categories, calomel electrode comes?

What pressure (bar) of $${\mathrm{H}}_2$$ would be required to make emf of hydrogen electrode zero in pure water at $$25^{\circ }\mathrm{C}$$ ?

Fuel cell, using hydrogen and oxygen as fuels, A. has been used in spaceship B. has as efficiency of $$40\%$$ to produce electricity C. uses aluminum as catalysts D. is eco-friendly E. is actually a type of Galvanic cell only Choose the correct answer from the options given below:

For a strong electrolyte, a plot of molar conductivity against (concentration) $${}^{1/2}$$ is a straight line, with a negative slope, the correct unit for the slope is

The emf of cell $$\mathrm{Tl}\left|\underset{(0.001\mathrm{M})}{{\mathrm{Tl}}^{+}}\right|\underset{(0.01\mathrm{M})}{{\mathrm{Cu}}^{2+}}\mid \mathrm{Cu}$$ is $$0.83\mathrm{V}$$ at $$298\mathrm{K}$$. It could be increased by :

The reaction; $$\frac{1}{2}{\mathrm{H}}_{2(\mathrm{g})}+{\mathrm{AgCl}}_{(\mathrm{s})}\to {\mathrm{H}}_{(\mathrm{aq})}^{+}+{\mathrm{Cl}}_{(\mathrm{aq})}^{-}+{\mathrm{Ag}}_{(\mathrm{s})}$$ occurs in which of the following galvanic cell :

Given below are two statements : Statement (I) : Fusion of $${\mathrm{MnO}}_2$$ with $$\mathrm{KOH}$$ and an oxidising agent gives dark green $${\mathrm{K}}_2{\mathrm{MnO}}_4$$. Statement (II) : Manganate ion on electrolytic oxidation in alkaline medium gives permanganate ion. In the light of the above statements, choose the correct answer from the options given below :

Molar ionic conductivities of divalent cation and anion are $$57{\mathrm{S}\mathrm{cm}}^2{\mathrm{mol}}^{-1}$$ and $$73{\mathrm{S}\mathrm{cm}}^2{\mathrm{mol}}^{-1}$$ respectively. The molar conductivity of solution of an electrolyte with the above cation and anion will be:

The reaction at cathode in the cells commonly used in clocks involves.

The quantity of silver deposited when one coulomb charge is passed through $${\mathrm{AgNO}}_3$$ solution :

For the electro chemical cell $$\mathrm{M}\left|{\mathrm{M}}^{2+}\right||\mathrm{X}|{\mathrm{X}}^{2-}$$ If $${\mathrm{E}}_{\left({\mathrm{M}}^{2+}/\mathrm{M}\right)}^0=0.46\mathrm{V}$$ and $${\mathrm{E}}_{\left(\mathrm{x}/{\mathrm{x}}^{2-}\right)}^0=0.34\mathrm{V}$$. Which of the following is correct?