\(3\, moles\) of metal complex with formula \(\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{3}\) gives \(3\, moles\) of silver chloride on treatment with excess of silver nitrate. The secondary valency of \(Co\) in the complex is \(.....\) (Round off to the nearest integer)

For the estimation of nitrogen, \(1.4\, g\) of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in \(60\, mL\) of \(\frac{M}{10}\) sulphuric acid. The unreacted acid required \(20\, mL\) of \(\frac{M}{10}\) sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is .....\(\%\)

Match List - I with List - II.

List - I (Reaction)	List - II (Type of redox reaction)
(A) Li	(I) 589.2
(B) Na	(II) 455.5
(C) Rb	(III) 670.8
(D) Cs	(IV) 780.0

Choose the correct answer from the options given below :

\(  {C{H_3} - C{H_2} - \overset{\overset{\LARGE{OH}}{|}}{\underset{\large {Ph}}{\underset{|}{C}}} - C{H_3}} \) can not be prepared by

Galvanization is applying a coating of :

Millimoles of calcium hydroxyide required to produce \(100\,mL\) of the aqueous solution of \(pH \,12\) is \(x \times 10^{-1}\). The value of \(x\) is \(..............\). (Nearest integer).Assume complete dissociation.

The complex that shows Facial - Meridional isomerism is _______.

In the given figure an ammeter \(A\) consists of a \(240 \Omega\) coil connected in parallel to a \(10 \Omega\) shunt. The reading of the ammeter is _______ \(\mathrm{mA}\).

Identify the correct statements :
A. Effective capacitance of a series combination of capacitors is always smaller than the smallest capacitance of the capacitor in the combination.
B. When a dielectric medium is placed between the charged plates of a capacitor, displacement of charges cannot occur due to insulation property of dielectric.
C. Increasing of area of capacitor plate or decreasing of thickness of dielectric is an alternate method to increase the capacitance.
D. For a point charge, concentric spherical shells centered at the location of the charge are equipotential surfaces.
Choose the correct answer from the options given below.

\(2 NO +2 H _{2} \rightarrow N _{2}+2 H _{2} O\) The above reaction has been studied at \(800^{\circ} C\). The related data are given in the table below.

Reaction serial number	Initial pressure of \(H _{2}\) / \(kPa\)	Initial Pressure of \(NO /\) \(kPa\)	Initial rate \(\left(\frac{- dp }{ dt }\right) /( kPa / s )\)
\(1\)	\(65.6\)	\(40.0\)	\(0.135\)
\(2\)	\(65.6\)	\(20.1\)	\(0.033\)
\(3\)	\(38.6\)	\(65.6\)	\(0.214\)
\(4\)	\(19.2\)	\(65.6\)	\(0.106\)

 The order of the reaction with respect to \(NO\) is \(...........\) 

A thermodynamic system is taken through the cyclic process ABC as shown in the figure (P-V graph : A(2, 100), B(5, 300), C(5, 100). The total work done by the system during the cycle ABC is ___________ J.

Let the tangents at two points \(A\) and \(B\) on the circle \(x ^{2}+ y ^{2}-4 x +3=0\) meet at origin \(O (0,0)\). Then the area of the triangle of \(OAB\) is.

Let the focal chord of the parabola \(P: y^{2}=4 x\) along the line \(L: y=m x+c, m>0\) meet the parabola at the points \(M\) and \(N\). Let the line \(L\) be a tangent to the hyperbola \(H : x ^{2}- y ^{2}=4\). If \(O\) is the vertex of \(P\) and \(F\) is the focus of \(H\) on the positive \(x\)-axis, then the area of the quadrilateral \(OMFN\) is.