Fitting reaction is

Identify the correct statements about the following stoichiometric equation.
\(\mathrm{aP}_4+\mathrm{b}^{-} \mathrm{OH}+\mathrm{cH}_2 \mathrm{O} \longrightarrow \mathrm{dPH}_3+\mathrm{eH}_2 \mathrm{PO}_2^{-}\)
I. \(a+b+c=5\)
II. \(\quad b+c-e=3\)
III. The oxidation state of P in \(\mathrm{H}_2 \mathrm{PO}_2^{-}\)is +1 .

At \(298 \mathrm{~K}, \Delta_r \mathrm{G}^{\ominus}\) for the following reaction is \(165.469 \mathrm{~kJ} \mathrm{~mol}^{-1}\).
What is the equilibrium constant for this reaction? \(\left(R=8.3 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\right)\)
\(\frac{3}{2} \mathrm{O}_2(\mathrm{~g}) \longrightarrow \mathrm{O}_3(\mathrm{~g})\)

The number of \(s p^2, s p^3\) hybridised carbons in cumene, respectively are

The correct statement among the following, regarding defects in solids is
$1$) Frenkel defect is favored by small difference in the sizes of cation and anion.
$2$) Frenkel defect is a metal excess defect.
$3$) Trapping of electron in the lattice leads to formation of F-centres.
$4$) Schottky defect has no effect on the physical property of solids.

Which one of the following is an example of disproportionation reaction?

\(Assertion\) (A) Helium and beryllium have similar outer electronic configuration \(n s^2\).
\(Reason\) (R) Both are chemically inert

In which of the following molecule/ion, all the bonds are not equal?

For a reversible reaction \(\quad A \rightleftharpoons B\), which one of the following statements is wrong from the given energy profile diagram?

Using the standard electrode potentials given below identify the correct statements from the following.
\[
\begin{aligned}
\mathrm{Fe}^{2+}+2 e^{-} \longrightarrow \mathrm{Fe} ; E^{\circ} & =-0.44 \mathrm{~V} \\
\mathrm{Cu}^{2+}+2 e^{-} \longrightarrow \mathrm{Cu} ; E^{\circ} & =+0.34 \mathrm{~V} \\
\mathrm{Ag}^{+}+e^{-} \longrightarrow \mathrm{Ag} ; E^{\circ} & =+0.80 \mathrm{~V}
\end{aligned}
\]
(i) Copper can displace iron from \(\mathrm{FeSO}_4\) solution.
(ii) Iron can displace copper from \(\mathrm{CuSO}_4\) solution.
(iii) Silver can displace copper from \(\mathrm{CuSO}_4\) solution.
(iv) Iron can displace silver from \(\mathrm{AgNO}_3\) solution.

If the average number of accidents occuring at a particular junction on a highway in a week is 5, then the probability that atmost one accident occurs in a particular week is

When a stretched wire of fundamental frequency \(f\) is divided into three segments, the fundamental frequencies of these three segments are \(f_1, f_2\) and \(f_3\) respectively. Then the relation among \(\mathrm{f}_1, \mathrm{f}_2, \mathrm{f}_3\) and f is (Assume tension is constant)

The magnetised wire of moment \(M\) and length \(l\) is bent in the form of semicircle of radius \(r\). Then its magnetic moment is