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 (Test) LIST II (Observation) A. $$\mathrm{B}{\mathrm{r}}_2$$ water test I. Yellow orange or orange red precipitate formed B. Ceric ammonium nitrate test II. Reddish orange colour disappears C. Ferric chloride test III. Red colour appears D. 2, 4 - DNP test IV. Blue, Green, Violet or Red colour appear Choose the correct answer from the options given below:

Identify the incorrect statements regarding primary standard of titrimetric analysis. (A) It should be purely available in dry form. (B) It should not undergo chemical change in air. (C) It should be hygroscopic and should react with another chemical instantaneously and stoichiometrically. (D) It should be readily soluble in water. (E) $${\mathrm{KMnO}}_4$$ & $$\mathrm{NaOH}$$ can be used as primary standard. Choose the correct answer from the options given below :

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 (Test) LIST II (Identification) A. Bayer's test I. Phenol B. Ceric ammonium nitrate test II. Aldehyde C. Phthalein dye test III. Alcoholic-OH group D. Schiff's test IV. Unsaturation Choose the correct answer from the options given below :

The correct statement among the following, for a "chromatography" purification method is :

Which of the following statements are correct? A. Glycerol is purified by vacuum distillation because it decomposes at its normal boiling point. B. Aniline can be purified by steam distillation as aniline is miscible in water. C. Ethanol can be separated from ethanol water mixture by azeotropic distillation because it forms azeotrope. D. An organic compound is pure, if mixed M.P. is remained same. Choose the most appropriate answer from the options given below :

Which of the following reactions are disproportionation reactions? (A) ${\mathrm{Cu}}^{+}\to {\mathrm{Cu}}^{2+}+\mathrm{Cu}$ (B) $3{\mathrm{MnO}}_4^{2-}+4{\mathrm{H}}^{+}⟶2{\mathrm{MnO}}_4^{-}+{\mathrm{MnO}}_2+2{\mathrm{H}}_2\mathrm{O}$ (C) $2{\mathrm{KMnO}}_4⟶{\mathrm{K}}_2{\mathrm{MnO}}_4+{\mathrm{MnO}}_2+{\mathrm{O}}_2$ (D) $2{\mathrm{MnO}}_4^{-}+3{\mathrm{Mn}}^{2+}+2{\mathrm{H}}_2\mathrm{O}⟶5{\mathrm{MnO}}_2+4{\mathrm{H}}^{+}$ Choose the correct answer from the options given below :

In acidic medium, ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ shows oxidising action as represented in the half reaction: $${\mathrm{Cr}}_2{\mathrm{O}}_7{}^{2-}+{\mathrm{XH}}^{+}+{\mathrm{Ye}}^{\ominus }\to 2\mathrm{A}+{\mathrm{ZH}}_2\mathrm{O}$$ $\mathrm{X},\mathrm{Y},\mathrm{Z}$ and $\mathrm{A}$ are respectively are :

Which of the following cannot function as an oxidising agent?

Chlorine undergoes disproportionation in alkaline medium as shown below : $${\mathrm{aCl}}_{2(\mathrm{g})}+\mathrm{b}{\mathrm{OH}}_{(\mathrm{aq})}^{-}\to \mathrm{c}{\mathrm{ClO}}_{(\mathrm{aq})}^{-}+\mathrm{d}{\mathrm{Cl}}_{(\mathrm{aq})}^{-}+\mathrm{e}{\mathrm{H}}_2{\mathrm{O}}_{(\mathrm{l})}$$ The values of $$a,b,c$$ and $$d$$ in a balanced redox reaction are respectively :

In alkaline medium, $${\mathrm{MnO}}_4^{-}$$ oxidises $${\mathrm{I}}^{-}$$ to

When $${\mathrm{MnO}}_2$$ and $${\mathrm{H}}_2{\mathrm{SO}}_4$$ is added to a salt $$(\mathrm{A})$$, the greenish yellow gas liberated as salt (A) is :

Thiosulphate reacts differently with iodine and bromine in the reactions given below: $$\begin{array}{rl}& 2{\mathrm{S}}_2{\mathrm{O}}_3^{2-}+{\mathrm{I}}_2\to {\mathrm{S}}_4{\mathrm{O}}_6^{2-}+2{\mathrm{I}}^{-}\\ & {\mathrm{S}}_2{\mathrm{O}}_3^{2-}+5{\mathrm{Br}}_2+5{\mathrm{H}}_2\mathrm{O}\to 2{\mathrm{SO}}_4^{2-}+4{\mathrm{Br}}^{-}+10{\mathrm{H}}^{+}\end{array}$$ Which of the following statement justifies the above dual behaviour of thiosulphate?

The number of ions from the following that are expected to behave as oxidising agent is : $${\mathrm{Sn}}^{4+},{\mathrm{Sn}}^{2+},{\mathrm{Pb}}^{2+},{\mathrm{Tl}}^{3+},{\mathrm{Pb}}^{4+},{\mathrm{Tl}}^{+}$$

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 Reaction LIST II Type of redox reaction A. $${\mathrm{N}}_{2(\mathrm{g})}+{\mathrm{O}}_{2(\mathrm{g})}\to 2{\mathrm{NO}}_{(\mathrm{g})}$$ I. Decomposition B. $$2\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_{2(\mathrm{s})}\to 2{\mathrm{PbO}}_{(\mathrm{s})}+4{\mathrm{NO}}_{2(\mathrm{g})}+{\mathrm{O}}_{2(\mathrm{g})}$$ II. Displacement C. $$2{\mathrm{Na}}_{(\mathrm{s})}+2{\mathrm{H}}_2{\mathrm{O}}_{(\mathrm{l})}\to 2{\mathrm{NaOH}}_{(\mathrm{aq}.)}+{\mathrm{H}}_{2(\mathrm{g})}$$ III. Disproportionation D. $$2{\mathrm{NO}}_{2(\mathrm{g})}+2^{-}\mathrm{OH}(\text{ aq. })\to {\mathrm{NO}}_{2(\mathrm{aq}.)}^{-}+{\mathrm{NO}}_{3(\text{ aq. })}^{-}+{\mathrm{H}}_2{\mathrm{O}}_{(\mathrm{l})}$$ IV. Combination Choose the correct answer from the options given below :

Given below are two statements : Statement (I) : ${\mathrm{SiO}}_2$ and ${\mathrm{GeO}}_2$ are acidic while $\mathrm{SnO}$ and $\mathrm{PbO}$ are amphoteric in nature. Statement (II) : Allotropic forms of carbon are due to property of catenation and $\mathrm{p}\pi -\mathrm{d}\pi$ bond formation. In the light of the above statements, choose the most appropriate answer from the options given below :

The strongest reducing agent among the following is :

Element not showing variable oxidation state is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Melting point of Boron (2453 K) is unusually high in group 13 elements. Reason (R) : Solid Boron has very strong crystalline lattice. In the light of the above statements, choose the most appropriate answer from the options given below ;

Given below are two statements : Statement (I) : Oxygen being the first member of group 16 exhibits only -2 oxidation state. Statement (II) : Down the group 16 stability of +4 oxidation state decreases and +6 oxidation state increases. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements: Statement I : Group 13 trivalent halides get easily hydrolyzed by water due to their covalent nature. Statement II : $${\mathrm{AlCl}}_3$$ upon hydrolysis in acidified aqueous solution forms octahedral $${\left[\mathrm{Al}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$$ ion. In the light of the above statements, choose the correct answer from the options given below :