The freezing point of benzene decreases by 0.450C when 0.2 g of acetic acid is added to 20g of benzene. If acetic acid associates to form a dimer in benzene, percentage association of acetic acid in benzene will be: (Kf for benzene = 5.12 K kg mol–1)

The following reaction occurs in the Blast Furnace where iron ore is reduced to iron metal : Fe2O3(s) + 3 CO(g) $$\rightleftharpoons$$ 2 Fe(1) + 3 CO2(g) Using the Le Chatelier’s principle, predict which one of the following will not disturb the equilibrium ?

A water sample has ppm level concentration of following anions F- = 10; $$S{O}_4^{2-}$$ = 100; $$N{O}_3^{-}$$ = 50 The anion/anions that make/makes the water sample unsuitable for drinking is/are :

Identify the pollutant gases largely responsible for the discoloured and lustreless nature of marble of the Taj Mahal.

Which of the following is a set of greenhouse gases?

Which of the following compounds will form significant amount of meta product during mono-nitration reaction?

Among the following compounds, the increasing order of their basic strength is :

The major product expected from the following reaction is :

What is the standard reduction potential (Eo) for Fe3+ $$\to$$ Fe ? Given that : Fe2+ + 2e$$-$$ $$\to$$ Fe; $$E_{F{e}^{2+}/Fe}^o$$ = $$-$$0.47 V Fe3+ + e$$-$$ $$\to$$ Fe2+; $$E_{F{e}^{3+}/F{e}^{2+}}^o$$ = +0.77 V

Consider the following standard electrode potentials (Eo in volts) in aqueous solution : .tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;} .tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;border-color:black;} .tg .tg-wv9z{font-size:22px;text-align:center} .tg .tg-de48{font-weight:bold;font-size:22px;text-align:center} Element M3+ /M M+ /M A1 -1.66 + 0.55 T1 +1.26 - 0.34 Based on these data, which of the following statements is correct ?

To find the standard potential of M3+/M electrode,the following cell is constituted : Pt/M/M3+(0.001 mol L−1 )/Ag+(0.01 mol L−1 )/Ag The emf of the cell is found to be 0.421 volt at 298 K. The standard potential of half reaction M3+ + 3e−$$\to$$ M at 298 K will be : (Given $$E_{A{g}^{+}/Ag}^{-}$$ at 298 K = 0.80 Volt)

Given $$E_{C{l}_2/C{l}^{-}}^o$$ = 1.36 V, $$E_{C{r}^{3+}/Cr}^o$$ = - 0.74 V $$E_{C{r}_2{O_7}^{2-}/C{r}^{3+}}^o$$ = 1.33 V, $$E_{Mn{O_4}^{-}/M{n}^{2+}}^o$$ = 1.51 V Among the following, the strongest reducing agent is :

The formation of which of the following polymers involves hydrolysis reaction?

Which of the following is a biodegradable polymer ?

The pair of compounds having metals in their highest oxidation state is :

Which of the following ions does not liberate hydrogen gas on reaction with dilute acids ?

In the following reactions, ZnO is respectively acting as a/an : (a) ZnO + Na2O $$\to$$ Na2ZnO2 (b) ZnO + CO2 $$\to$$ ZnCO3

Which of the following species is not paramagnetic?

The group having triangular planar structures is :

sp3d2 hybridization is not displayed by :