Question
Which of the following is erythro form and optically active ?
✓
Answer
a
Both the $-OH$ groups are on same side No $POS$ i.e. why optically active
Both the $-OH$ groups are on same side No $POS$ i.e. why optically active
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The product of the following reaction is
For ${N_2} + 3{H_2}$ $\rightleftharpoons$ $2N{H_3} + $ heat
→The standard reduction potentials at $298\,K$ for the following half reactions are given against each
→$Z{n^{2 + }}\,(aq)\, + \,2e\, \rightleftharpoons \,Zn\,(s)\,;\, - \,0.762\,V$
$C{r^{3 + }}\,(aq)\, + \,3e\, \rightleftharpoons \,Cr(s)\,;\, - \,0.740\,\,V$
$2{H^ + }\,(aq)\, + \,2e\, \rightleftharpoons \,{H_2}(g)\,;\,\,\,0.00\,\,\,V$
$F{e^{3 + }}\,(aq)\, + \,e\, \rightleftharpoons \,F{e^{2 + }}(aq)\,;\,\,\,0.770\,\,\,V$
Which is the strongest reducing agent ?
Match the list - I with list - II
Choose the correct answer from the option given below :
| LIST-I Name reaction | LIST-II Product obtainable | ||
| A. | Swarts reaction | I. | Ethyl benzene |
| B. | Sandmeyer's reaction | II. | Ethyl iodide |
| C. | Wurtz Fittig reaction | III. | Cyanobenzene |
| D. | Finkelstein reaction | IV. | Ethyl fluoride |
For the reaction ${N_{2(g)}} + {O_{2(g)}}$ $\rightleftharpoons$ $2N{O_{(g)}}$, the value of ${K_c}$ at ${800\,^o}C$ is $0.1$. When the equilibrium concentrations of both the reactants is $0.5\, mol,$ what is the value of ${K_p}$ at the same temperature
→In which of the following species is the interatomic bond angle is ${109^o}28'$
→The oxidation potentials of following half-cell reactions are given
→$Zn \to Z{n^{2 + }} + 2{e^ - };{E^o} = 0.76\,\,V$,$Fe \to F{e^{2 + }} + 2{e^ - };{E^o} = 0.44\,\,V$ what will be the emf of cell, whose cell-reaction is ............ $\mathrm{V}$
$F{e^{2 + }}(aq) + Zn \to Z{n^{2 + }}(aq) + Fe$
Point out the wrong statement in relation to the structure of benzene
Given below are two statements.
→Statement $I:$ According to Bohr's model of an atom, qualitatively the magnitude of velocity of electron increases with decrease in positive charges on the nucleus as there is no strong hold on the electron by the nucleus.
Statement $II:$ According to Bohr's model of an atom, qualitatively the magnitude of velocity of electron increases with decrease in principal quantum number.
In the light of the above statements, choose the most appropriate answer from the options given below:
If uncertainty in position and momentum are equal, then uncertainty in velocity is