The IUPAC name of C H_3 C N is

At $298\, K$ standard Gibb's energies of formation for $CH_3OH(l),H_2O(l)$ and $CO_2 (g)$ are $-166.2,-237.2$ and $-394.4\, kJ\,mol^{-1}$ respectively. If standard enthalpy of combustion of methonal is $-726 \,kJ\, mol^{-1},$ efficiency of the fuel cell will be .......... $\%$.

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Select the incorrect graph for velocity of $e^-$ in an orbit vs. $ Z, \frac {1}{n}$ and $n$

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A Daniel Cell is made at $25\,^oC$ by connecting $Zn/Z{n^{ + 2}}\left( {0.1\ M,1\ liter} \right)$ and $Cu/C{u^{ + 2}}\left( {0.9\ M,1\ liter} \right)$ electrode. The cell is discharged till its emf reaches $1.10\ volt$, then it is charged (reversing the discharge process) by passing $0.6\ F$ charge

[Given : ${E^0}_{Zn/Z{n^{ + 2}}} = 0.76\,V,$

${E^0}_{Cu/C{u^{ + 2}}} = - 0.34\,V,\,\frac{{2.303\,RT}}{F} = 0.06,\log 2 = 0.30]$

Select the incorrect option is

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When $7.1\,gm\,N{a_2}S{O_4}$ (molecular mass $142$) dissolves in $100\,ml\,{H_2}O$, the molarity of the solution is ......... $M$

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$DNA$ contains the sugar

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