Which of the following will be most stable diazonium salt \(RN_2^+X^-\) ?

The order of stability of the following tautomeric compounds is \(\mathop {\begin{array}{*{20}{c}}
  {OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\ 
  {C{H_2} = C - C{H_2} - C - C{H_3}} 
\end{array}}\limits_{(I)}  \rightleftharpoons \) \(\mathop {\begin{array}{*{20}{c}}
  {OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\ 
  {C{H_3} - C - C{H_2} - C - C{H_3}} 
\end{array}}\limits_{(II)}  \rightleftharpoons \) \(\mathop {\begin{array}{*{20}{c}}
  {OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\ 
  {C{H_3} - C = CH - C - C{H_3}} 
\end{array}}\limits_{(III)} \)

The name of complex ion, \([Fe(CN)_6]^{3-}\) is

The rate constant of the reaction \(A\rightarrow B\) is \(0.6 \times 10^{-3}\, mol\, L^{-1}\, s^{-1}.\) If the concentration of \(A\) is \(5\, M,\) then concentration of \(B\) after \(20\) minutes is ......... \(M.\)

Under isothermal condition, a gas at \(300 \;K\) expands from \(0. 1\;L\). to \(0.25\;L\). against a constant external pressure of \(2\;bar\). The work done by the gas is .... [Given that \(1 \;\mathrm{L} \text { bar }=100 \;\mathrm{J}\)]

Mass in grams of copper deposited by passing \(9.6487\) A current through a voltmeter containing copper sulphate solution for \(100\) seconds is (Given : Molar mass of \(\mathrm{Cu}: 63 \mathrm{~g} \mathrm{~mol}^{-1}, 1 \mathrm{~F}=96487 \mathrm{C}\) )

Which of the following compounds is used in cosmetic surgery?

If the distance between two consecutive base pairs is \(0.34\, nm\) and the total number of base pairs of a \(DNA\) double helix in a typical mammalian cell is \(6.6 \times 10^{9}\) \(bp,\) then the length of the \(DNA\) is approximately 

Select the correct events that occur during inspiration. \((a)\) Contraction of diaphragm \((b)\) Contraction of external inter-costal muscles \((c)\) Pulmonary volume decreases \((d)\) Intra pulmonary pressure increases

Which of the following \(rRNAs\) acts as structural \(RNA\) as well as ribozyme in bacteria?

Given below are two statements : One is labelled as Assertion (A) and other is labelled as Reason (R).
Assertion (A) : Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus.
Reason (R) : Presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells.
In light of the above statements, choose the most appropriate answer from the options given below:

The correct statement regarding the comparison of staggered and eclipsed conformations of ethane, is

When man eats fish which feeds onzooplanktons which have eaten small plants,the producer in this chain is