Which of the following oxidation reactions are carried out by both ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ and ${\mathrm{KMnO}}_4$ in acidic medium? A. ${\Gamma }^{-}\to {\mathrm{I}}_2$ B. ${\mathrm{S}}^{2-}\to \mathrm{S}$ C. ${\mathrm{Fe}}^{2+}\to {\mathrm{Fe}}^{3+}$ D. ${\mathrm{I}}^{-}\to {\mathrm{IO}}_3^{-}$ E. ${\mathrm{S}}_2{\mathrm{O}}_3{}^{2-}\to {\mathrm{SO}}_4^{2-}$ Choose the correct answer from the options given below :

The maximum covalency of a non-metallic group 15 element ' E ' with weakest $\mathrm{E}-\mathrm{E}$ bond is :

The incorrect statement among the following is

The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of

The nature of oxide $\left({\mathrm{TeO}}_2\right)$ and hydride $\left({\mathrm{TeH}}_2\right)$ formed by Te , respectively are :

Given below are two statements : Statement I : The N - N single bond is weaker and longer than that of P - P single bond. Statement II : Compounds of group 15 elements in +3 oxidation states readily undergo disproportionation reactions. In the light of the above statements, choose the correct answer from the options given below

The correct statements from the following are :(A) Tl3+ is a powerful oxidising agent(B) Al3+ does not get reduced easily(C) Both Al3+ and Tl3+ are very stable in solution(D) Tl1+ is more stable than Tl3+(E) Al3+ and Tl1+ are highly stableChoose the correct answer from the options given below :

Given below are two statements : Statement (I) : The first ionisation enthalpy of group 14 elements is higher than the corresponding elements of group 13. Statement (II) : Melting points and boiling points of group 13 elements are in general much higher than those of corresponding elements of group 14. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements: Statement I: Nitrogen forms oxides with +1 to +5 oxidation states due to the formation of $\mathrm{p}\pi -\mathrm{p}\pi$ bond with oxygen. Statement II: Nitrogen does not form halides with +5 oxidation state due to the absence of d-orbital in it. In the light of given statements, choose the correct answer from the options given below.

Given below are the pairs of group 13 elements showing their relation in terms of atomic radius. $(\mathrm{B}

Given below are two statements : Statement (I): On nitration of m-xylene with ${\mathrm{HNO}}_3,{\mathrm{H}}_2{\mathrm{SO}}_4$ followed by oxidation, 4-nitrobenzene-1,3-dicarboxylic acid is obtained as the major product. Statement (II) : $-{\mathrm{CH}}_3$ group is o/p-directing while $-{\mathrm{NO}}_2$ group is m-directing group. In the light of the above statements, choose the correct answer from the options given below :

Given below are two statements : Statement (I): In partition chromatography, stationary phase is thin film of liquid present in the inert support. Statement (II): In paper chromatography, the material of paper acts as a stationary phase. In the light of the above statements, choose the correct answer from the options given below :

Match List - I with List - II. List - I (Structure) List - II (IUPAC Name) (A) (I) 4-Methylpent-1-ene (B) (CH3)2C(C3H7)2 (II) 3-Ethyl-5-methylheptane (C) (III) 4,4-Dimethylheptane (D) (IV) 2-Methyl-1,3-pentadiene Choose the correct answer from the options given below :

Total number of nucleophiles from the following is :

How many different stereoisomers are possible for the given molecule?

The incorrect statements regarding geometrical isomerism are : (A) Propene shows geometrical isomerism. (B) Trans isomer has identical atoms/groups on the opposite sides of the double bond. (C) Cis-but-2-ene has higher dipole moment than trans-but-2-ene. (D) 2-methylbut-2-ene shows two geometrical isomers. (E) Trans-isomer has lower melting point than cis isomer. Choose the correct answer from the options given below :

The IUPAC name of the following compound is :

The most stable carbocation from the following is :

Given below are two statements:Statement I: and are isomeric compounds.Statement II: and are functional group isomers.In the light of the above statements, choose the correct answer from the options given below:

The correct stability order of the following species/molecules is :